Thomson TSC 800 V2.1 User Manual

TSC 800

TRANSFER SWITCH CONTROLLER

INSTALLATION, OPERATING &

SERVICE MANUAL

Software Version 2.2

PM049 REV 10 08/09/25

9087A – 198th Street, Langley, BC Canada V1M 3B1  Telephone [phone]

Telefax [phone]  E-Mail: [e-mail]  www.thomsontechnology.com

9087A – 198th Street, Langley, BC Canada V1M 3B1  Telephone [phone]

Telefax [phone]  E-Mail: [e-mail]  www.thomsontechnology.com

TSC 800 TRANSFER SWITCH CONTROLLER

TABLE OF CONTENTS

1. INTRODUCTION 1

1.1. PRODUCT REVISION HISTORY 1

1.2. GENERAL DESCRIPTION 2

2. INSTALLATION 2

2.1. GENERAL INFORMATION 2

2.2. NOTES TO INSTALLER 3

2.3. AC VOLTAGE SENSING INPUT 3

2.4. AC CONTROL POWER INPUT 3

2.5. OUTPUTS 5

2.6. SYSTEM PHASING-HIGH LEG DELTA SYSTEMS 5

2.7. EXTERNAL PANEL CONTROL WIRING 8

2.8. REMOTE START CONTACT FIELD WIRING 8

2.9. COMMMUNICATION CABLE 9

2.10. DIELECTRIC TESTING 10

3. DESCRIPTION 10

3.1. LEXAN FACEPLATE 10

3.2. PRINTED CIRCUIT BOARD 12

3.2.1. POWER SUPPLY INPUT VOLTAGE SELECTION 12

3.2.2. TERMINAL BLOCKS 13

3.2.3. DIAGNOSTIC LEDs 13

3.2.4. COMMUNICATION PORT 14

3.2.5. CONTRAST ADJUSTMENT 14

4. REMOTE COMMUNICATION 14

5. TSC 800 DISPLAY MENUS 17

5.1. SYSTEM TIME MENU 18

5.2. ATS MODE MENU 18

5.3. TSC 800 PROGRAM MENU 22

5.4. SYSTEM OPERATION MENU 22

5.5. TIMER COUNTDOWN MENUS 24

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TSC 800 TRANSFER SWITCH CONTROLLER

5.6. UTILITY SUPPLY MENU 25

5.7. GENERATOR SUPPLY MENU 26

5.8. STATS MENU 27

6. OPERATING INSTRUCTIONS 28

6.1. AUTOMATIC SEQUENCE OF OPERATION 28

6.1.1. NORMAL SEQUENCE OF OPERATION (OPEN TRANSITION TRANSFER) 28

6.1.2. NORMAL SEQUENCE OF OPERATION (CLOSED TRANSITION TRANSFER) 29

6.1.3. TEST MODE SEQUENCE OF OPERATION 30

6.1.4. ABNORMAL SEQUENCE OF OPERATION 32

6.2. LCD DISPLAY OPERATION 32

6.4.1 OPERATOR INITIATED UTILITY POWER FAIL SIMULATION (LOAD TEST) 34

6.4.2 AUTOMATIC PLANT EXERCISE TEST 35

6.4.3 FOUR FUNCTION REMOTE TEST (FTS4 OPTION) 35

6.5 TRANSFER FAIL FAULT RESET 37

6.6 LAMP TEST 37

6.7 TIMER BYPASS 37

6.8 MANUAL UTILITY RE-TRANSFER 38

6.9 SERVICE ENTRANCE ATS MODE 38

6.10 PHASE BALANCE PROTECTION ALARM 38

7. PROGRAMMING INSTRUCTIONS 39

7.1. PASSWORDS 39

7.1.1. READ ONLY MODE 39

7.1.2. READ / WRITE MODE 39

7.1.3. MASTER READ / WRITE MODE 40

7.2. EXERCISE TIMER 41

7.2.1. SYSTEM TIME ROLLOVER 41

7.2.2. AUTO TEST START DAY/WEEK NUMBER 42

7.2.3. AUTO TEST START HOUR 42

7.2.4. AUTO TEST START MINUTE 42

7.2.5. AUTO TEST STOP DAY/WEEK NUMBER 42

7.2.6. AUTO TEST STOP HOUR 42

7.2.7. AUTO TEST STOP MINUTE 43

7.2.8. AUTO TEST MODE 43

7.3. SYSTEM CONFIGURATION 43

7.3.1. FIRMWARE VERSION 43

7.3.2. ATS MODE MENU PASSWORD (PW) 43

7.3.3. UTILITY FAIL CALLOUT 44

7.3.4. LOAD ON GENERATOR CALLOUT 44

7.3.5. TRANSFER FAIL CALLOUT 44

7.3.6. AUTO TEST CALLOUT 44

7.3.7. MAN TEST CALLOUT 45

7.3.8. SWITCH NOT IN AUTO CALLOUT 45

7.3.9. NODE ADDRESS 45

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TSC 800 TRANSFER SWITCH CONTROLLER

7.3.10. SYSTEM VOLTAGE 45

7.3.11. VOLTAGE SENSING RATIO 45

7.3.12. SYSTEM FREQUENCY 46

7.3.13. SYSTEM PHASES 46

7.3.14. LOAD SENSING PHASES 46

7.3.15. PHASE BALANCE 46

7.3.16. PHASE BALANCE DELAY 47

7.3.17. PHASE BALANCE RETRANSFER 47

7.4. VOLTAGE SENSING 47

7.4.1. UTILITY UNDER VOLTAGE SENSOR PICKUP 48

7.4.2. UTILITY UNDER VOLTAGE SENSOR DROPOUT 48

7.4.3. UTILITY UNDER VOLTAGE SENSOR TIME DELAY (DROPOUT) 48

7.4.4. UTILITY OVER VOLTAGE SENSOR PICKUP 48

7.4.5. UTILITY OVER VOLTAGE SENSOR DROPOUT 49

7.4.6. UTILITY OVER VOLTAGE SENSOR TIME DELAY (PICKUP) 49

7.4.7. UTILITY UNDER FREQUENCY SENSOR 49

7.4.8. UTILITY UNDER FREQUENCY SENSOR TIME DELAY (DROPOUT) 49

7.4.9. UTILITY OVER FREQUENCY SENSOR 49

7.4.10. UTILITY OVER FREQUENCY SENSOR TIME DELAY (PICKUP) 49

7.4.11. GENERATOR UNDER VOLTAGE SENSOR PICKUP 49

7.4.12. GENERATOR UNDER VOLTAGE SENSOR DROPOUT 50

7.4.13. GENERATOR UNDER VOLTAGE SENSOR TIME DELAY (DROPOUT) 50

7.4.14. GENERATOR OVER VOLTAGE SENSOR PICKUP 50

7.4.15. GENERATOR OVER VOLTAGE SENSOR DROPOUT 50

7.4.16. GENERATOR OVER VOLTAGE SENSOR TIME DELAY (PICKUP) 51

7.4.17. GENERATOR UNDER FREQUENCY SENSOR 51

7.4.18. GENERATOR UNDER FREQUENCY SENSOR TIME DELAY (DROPOUT) 51

7.4.19. GENERATOR OVER FREQUENCY SENSOR 51

7.4.20. GENERATOR OVER FREQUENCY SENSOR TIME DELAY (PICKUP) 51

7.5. GENERATOR CONTROL LOGIC 51

7.5.1. COMMIT TO TRANSFER LOGIC 51

7.5.2. GENERATOR START DELAY 52

7.5.3. GENERATOR WARMUP DELAY 52

7.5.4. GENERATOR COOLDOWN DELAY 52

7.5.5. PRE-TRANSFER DELAY (LDC) 52

7.5.6. POST-TRANSFER DELAY (LDC) 53

7.5.7. TRANSFER LOGIC 53

7.5.8. LOAD ON UTILITY PROGRAMMABLE OUTPUT 54

7.5.9. LOAD ON GENERATOR PROGRAMMABLE OUTPUT 55

7.5.10. MAXIMUM FIND NEUTRAL DELAY 55

7.5.11. NEUTRAL DELAY TIMER (NDT) 56

7.5.12. NEUTRAL DELAY BYPASS 57

7.5.13. MAXIMUM TRANSFER TIME 57

7.5.14. TRANSFER FAIL 57

7.5.15. MANUAL UTILITY TRANSFER RETURN 58

7.5.16. UTILITY RETURN DELAY 58

7.5.17. MAX SYNC TIME 59

7.5.18. MAX POWER SWITCHING DEVICE OPEN TIME 59

7.5.19. PROGRAMMABLE OUTPUT 59

7.6. VOLTAGE SENSING CALIBRATION 60

7.6.1. GENERAL 61

7.6.2. UTILITY VOLTAGE CALIBRATION 62

7.6.3. GENERATOR VOLTAGE CALIBRATION 65

7.6.4. LOAD VOLTAGE CALIBRATION 67

8. TSC 800 PROGRAMMING DATA SHEETS 70

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TSC 800 TRANSFER SWITCH CONTROLLER

9. TSC 800 TYPICAL CONNECTION DIAGRAM 75

10. TSC 800 SPECIFICATIONS 76

11. TROUBLESHOOTING 77

12. REPLACEMENT PARTS 81

13. PRODUCT RETURN POLICY 81

14. NOTES 82

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1. INTRODUCTION

1.1. PRODUCT REVISION HISTORY

The following information provides an historical summary of changes made to this product

since the original release.

Software Version

TSC 800 TRANSFER SWITCH CONTROLLER

2.2 08/08/01

2.1 06/03/27

2.0 04/12/14

1.7 02/04/01

1.6 98/12/15

1.5 N/A

1.4 98/06/15

1.3 98/01/19

Enabled Clock Time Save Feature

Enhanced Phase Balance Features

New Features (Refer to Section 1.2)

Revised Transfer Fail Features and functionality

Added Remote Communication

Unreleased version

Updated Transfer Fail operation

Updated default under/over frequency setpoints, transfer fail
programmability, minor logic revisions

1.2 97/10/10

1.1 97/01/30

1.0 96/06/30

Changed Transfer Switch fail timer to 30 seconds

Upgraded Frequency setting range

Original version

Operating & Service Manual Version

Rev 10 08/09/25

Changes for Version 2.2 TSC 800 Software. Added Information for
ICS ATS Neutral delay time

Rev 9 06/04/24

Minor manual revisions for Version 2.1 TSC 800 Software
Production Release

Rev 8 06/03/27

Enhanced phase balance features

Rev 7 04/12/16

Rev 6 02/04/15

Rev 5 00/07/31

Rev 4 00/03/01

Rev 3 99/02/12

Rev 2 98/12/01

New Features (Refer to Section 1.2)
Changes for Version 1.7 TSC 800 Software

Added Four Position Test Switch Information

General revisions

Added Multi-tap information.

Added Remote Communication features per version 1.6 TSC 800
Software

Rev 1 98/01/21

Rev 0 97/06/04

General Revisions for upgraded TSC 800 software

Original release

Contact Thomson Technology, to obtain applicable instruction manuals. Soft copy of most

current version is available at www.thomsontechnology.com.

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1

1.2. GENERAL DESCRIPTION

The TSC 800 controller utilizes microprocessor-based design technology, which provides high

accuracy for all voltage sensing and timing functions. The TSC 800 is factory configured to

control all the operational functions and display features of the automatic transfer switch. All

features of the TSC 800 are fully programmable from the front panel LCD display and are

security password protected. The LCD display screen prompts are in plain English, providing

a user-friendly operator interface with many display options available. The microprocessor

design provides many standard features, which were previously only available as add-on

optional features.

2. INSTALLATION

TSC 800 TRANSFER SWITCH CONTROLLER

CAUTION

contents subject to damage by

STATIC ELECTRICITY

This equipment contains static-sensitive parts. Please observe the following anti-static precautions at

all times when handling this equipment. Failure to observe these precautions may cause equipment

failure and/or damage.

• Discharge body static charge before handling the equipment (maintain exposed body contact

with a properly grounded surface while handling the equipment, a grounding wrist strap

can/should also be utilized).

• Do not touch any components on the printed circuit board with your hands or any other

conductive equipment.

Do not place the equipment on or near materials such as Styrofoam, plastic and vinyl. Place the

equipment on properly grounded surfaces and only use an anti-static bag for transporting the

equipment.

2.1. GENERAL INFORMATION

NOTE:

Installations should be done in accordance

with all applicable electrical regulation

codes as required.

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TSC 800 TRANSFER SWITCH CONTROLLER

The following installation guidelines are provided for general information only pertaining to

typical site installations. For specific site installation information, consult Thomson

Technology as required. NOTE: Factory installations of THOMSON TECHNOLOGY supplied

transfer switches that have been tested and proven may deviate from these

recommendations.

2.2. NOTES TO INSTALLER

If the transfer switch has programmable/multi-tap system voltage capability (refer to electrical

schematic), confirm the transfer switch has been configured for the system voltage.

WARNING

Failure to confirm and match transfer

switch voltage with the system voltage

could cause serious equipment damage.

If the transfer switch requires reconfiguring, the TSC 800 controller will also require

reprogramming.

CAUTION!!!

Qualified personnel must complete all installation and/or service work

performed only. Failure to do so may cause personal injury or death.

2.3. AC VOLTAGE SENSING INPUT

The TSC 800 can accept direct AC voltage sensing inputs on the generator and utility supplies

from 120-600VAC (nominal). NOTE: Direct input voltage sensing can only be used when the

system utilizes a 3 phase, 4 wire distribution system which has the neutral conductor solidly

grounded. For 3 phase, 3 wire systems (i.e. no neutral) or high voltage systems, potential

transformers must be used (this is also the case where only 1 of the 2 supplies are 3 ph 3 w).

Refer to FIGURES 1-4 for voltage sensing connections.

2.4. AC CONTROL POWER INPUT

The TSC 800 is factory supplied for either 115VAC or 230VAC (nominal) control power input

voltage. Independent AC control power is required from both utility and generator supplies.

AC control power is utilized for internal TSC 800 control circuits and external control device

loads. The TSC 800 requires approximately 12VA AC power for internal control circuits. The

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TSC 800 TRANSFER SWITCH CONTROLLER

maximum external load is limited by output contact ratings (i.e. 10A resistive, 120/250VAC).

Total AC control power requirements for each supply must be determined by adding both

internal and external load requirements.

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TSC 800 TRANSFER SWITCH CONTROLLER

2.5. OUTPUTS

The TSC 800 provides the following types of output circuits:

Engine Start Contact Isolated Form C contact (10A, 250VAC Resistive)

Programmable Output Contact Isolated Form C contact (10A, 250VAC Resistive)

Transfer to Utility Output 250VAC1, 10A (Resistive) powered output contact

Transfer to Generator output 250VAC1, 10A (Resistive) powered output contact

Pre/post-transfer to utility 250VAC1, 3A (Resistive) powered output contact

Pre/post-transfer to generator 250VAC1, 3A (Resistive) powered output contact

Load on utility 250VAC1, 3A (Resistive) powered output contact

Load on generator 250VAC1, 3A (Resistive) powered output contact

1

NOTE: Output voltage is dependent upon AC control power input voltage (i.e. 120VAC or 230VAC

nominal).

Interposing relays are required between the TSC 800 outputs and the end device if loads

exceed the output current rating.

Transient suppression devices are required for all inductive devices sharing wiring or if

physically located near the transfer switch controller.

For AC operated relays or solenoids, use a suitably rated metal oxide varistor (MOV) or

capacitor/resistor suppressor. MOV selection should typically be equal to or slightly greater

than 1.3 times the nominal RMS voltage being applied to the inductive device.

NOTE: Selecting an MOV of too low a value can/will result in a sustained short circuit and

ultimately result in equipment failure.

2.6. SYSTEM PHASING-HIGH LEG DELTA SYSTEMS

When the transfer switch is connected to 3 phase 4 wire delta systems and no multi tap

power supply transformers supplied with the ATS, the “High” leg, must be connected to

Phase B of the Utility and/or Generator supply inputs to the ATS (Phase B, colored Orange

per “NEC 384-3(e)” identified as the leg with highest potential with reference to ground). This

will ensure the ATS control power that is internally connected between phase A and neutral is

maintained at 120VAC. Refer to figure below for further details.

WARNING

Failure to match correct system phasing

will result in serious damage to the

TSC 800 controller.

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TSC 800 TRANSFER SWITCH CONTROLLER

Auto matic Tra nsfer

Switch (Utility Supply)

A

(Re d)

PH A

(U A)

PH B

(U B)

B

(O ra ng e)

(High Le g)

240V 240 V

120V 12 0V

208V

N

(W hite )

PH C

(U C )

Neural

(N )

C

(Ye llow)

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TSC 800 TRANSFER SWITCH CONTROLLER

TSC 800

TB1-1

TB1-2

TB1-3

TB3-1

TB3-5

TB2-18

1

120

GRD

GRD

BA C N

VOLTAGE INPUTS

600VAC L-L, 347VAC L-N
480VAC L-L, 277VAC L-N
380VAC L-L, 220VAC L-N
208VAC L-L, 120VAC L-N

PT REQUIRED FOR TRANSFER SWITCH M ECHANISM POWER

1

(MUST BE SIZED TO SUIT POWER REQUIREMENTS).

FIG:1

3Ø, 4W 208/380/480/600VAC DIRECT SENSING

NOTE:

UTILITY VOLTAGE SENSING AND
CONTROL POWER SHOWN ONLY.

GRD

TSC 800

TB1-1

TB1-2

TB1-3

TB1-10

TB3-1

TB3-5

TB2-18

NO CONNECTION

GRD

L2L1 N

VOLTAGE INPUTS

240VAC L-L, 120VAC L-N

FIG:2

1Ø, 3W 120/240VAC DIRECT SENSING

NOTE:

UTILITY VOLTAGE SENSING SHOWN ONLY.

GRD

TSC 800

TB1-1

TB1-2

TB1-3

TB3-1

TB3-5

TB2-18

120

120

120

120

GRD

GRD

GRD

1

BA C N

SECONDARY PT VOLTAGE

208VAC L-L, 120VAC L-N
120VAC L-L, 69VAC L-N

PT REQUIRED FOR TRANSFER SWITCH M ECHANISM POWER

1

(MUST BE SIZED TO SUIT POWER REQUIREMENTS).

FIG:3

3Ø, 4W WYE PT's

NOTE:

UTILITY VOLTAGE SENSING SHOWN ONLY.

GRD

TSC 800

TB1-1

TB1-2

TB1-3

TB3-1

TB3-5

TB2-18

120

120

GRD

1

120

GRD

GRD

BA C

SECONDARY PT VOLTAGE

120VAC L-L [NO NEUTRAL]

NOTE

: ØB IS GROUNDED

PT REQUIRED FOR TRANSFER SWITCH M ECHANISM POWER

1

(MUST BE SIZED TO SUIT POWER REQUIREMENTS).

FIG:4

3Ø, 3W DELTA PT's

NOTE:

UTILITY VOLTAGE SENSING SHOWN ONLY.

REVISED

G:\ENGINEER\PRODUCTS\TSC800\852619.VSD

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97/06/27 09:12 AM

TSC 800 TRANSFER SWITCH CONTROLLER

2.7. EXTERNAL PANEL CONTROL WIRING

As a minimum, all control wiring shall conform to the local regulatory authority on electrical

installations. Specific wire sizes listed below are for typical circuits of distances up to 500ft

(150m)1, are as follows:

Utility or Generator Voltage Sensing #14 AWG (2.5mm2)

Transfer output signals #14 AWG (2.5mm2)

Remote Start Contact for Engine Controls #14 AWG (2.5mm2)

NOTE: For long control wire runs or noisy electrical environments the control wires

should be twisted & shielded with a suitable drain wire. The shielded cable drain wire

must be grounded at one end only. The drain wire grounding location may vary as

micro-processor controllers generally exist at both ends (engine generator set &

transfer switch) and one may be more susceptible depending on the level of induced

noise. The most susceptible controller will requiring the shield ground point as close

as possible to the controller. Wire runs from 500ft to 1000ft should be twisted and

shielded and increased to #12 AWG where total loop resistance is greater than 5

ohms.

1

For distances exceeding 1000ft. (300m) consult Thomson Technology

2.8. REMOTE START CONTACT FIELD WIRING

Field wiring of a remote start contact from a transfer switch to a control panel should conform

to the following guidelines to avoid possible controller malfunction and/or damage.

2.8.1. Remote start contact wires (2 #14 AWG (2.5mm2)) should be run in a separate

conduit (ferromagnetic type) and in all cases separated from any AC wiring.

2.8.2. Avoid wiring near AC power cables to prevent pick-up of induced voltages.

2.8.3. An interposing relay may be required if field-wiring distance is excessively long

(i.e. greater than 1000 feet (300m)) and/or if a remote contact has a resistance

of greater than 5.0 ohms. In extremely noisy environments, the wire run

lengths indicated may not provide reliable operation and can only be corrected

by the use of an interposing relay. The interposing relay is generally installed

at the engine controls and utilizes DC power. It is strongly suggested that the

ground return wire of the interposing relay be used for the interface to the TSC

800 remote start contact, this will ensure integrity of the DC power supply to the

engine generator set controls in the event of a shorted or grounded wire remote

start interface wire.

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TSC 800 TRANSFER SWITCH CONTROLLER

2.8.4. The remote start contact provided is voltage free (i.e. dry contact). Exposing

the remote start contact to voltage or current levels in excess of its rating will

damage the transfer controller.

2.9. COMMMUNICATION CABLE

Communication cable wiring from the controller’s communication port must be suitably routed

to protect it from sources of electrical interference. Guidelines for protection against possible

electrical interference are as follows:

• Use high quality, 8 conductor shielded cable only with drain wire grounded at the

controller end only.

• Route the communication cable at least 3 M (10’) away from sources of electrical

noise such as variable speed motor drives, high voltage power conductors, UPS

systems, transformers, rectifiers etc.

• Use separate, dedicated conduit runs for all communication cables. Do not tightly

bundle communication cables together in the conduit. Conduit should be

ferromagnetic type near sources of possible electrical interference. The entire

length of conduit should be grounded to building earth ground.

• When communication cables must cross over low or high voltage AC power

conductors, the communication cables must cross at right angles and not in

parallel with the conductors.

For additional information on protection against electrical interference, contact

THOMSON TECHNOLOGY factory.

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TSC 800 TRANSFER SWITCH CONTROLLER

2.10. DIELECTRIC TESTING

Do not perform any high voltage dielectric testing on the transfer switch with the TSC 800

controller connected into the circuit, as serious damage will occur to the controller. All AC

control fuses or control circuit isolation plugs connected to the TSC 800 must be

removed/disconnected if high voltage dielectric testing is performed on the transfer switch.

3. DESCRIPTION

The TSC 800 controller consists of two parts; a Lexan faceplate, which is mounted externally on the

transfer switch door, and a printed circuit board (PCB), which is mounted inside the transfer switch

door.

3.1. LEXAN FACEPLATE

The Lexan faceplate is shown as in FIGURE 7. The Lexan pushbuttons are connected to the

main PCB via plug-in ribbon cable. The main features of the Lexan faceplate are described

as follows with reference to FIGURE 7.

1

AUTOMATIC TRANSFER CONTROLLER

2

3

6

UTILITY

SUPPLY

MODEL TSC 800

LAMP TEST

EXIT DECREMENT INCREMENT ENTER

LOAD

54

7

GENERATOR

SUPPLY

FULL FILENAME

DRAWING1

DATE

02/04/04 11:58AM

FIGURE# 7

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TSC 800 TRANSFER SWITCH CONTROLLER

 LCD viewing window. The LCD display is mounted on the main PCB which is visible

from the lexan faceplate.

 EXIT pushbutton. The EXIT function is used to scroll backwards through the status

menus or programming prompts to the previous item. The EXIT function is used to

“exit” the programming menu by holding this button down for approximately 2 seconds

while in the programming mode.

 DECREMENT pushbutton. The DECREMENT function is used to change a

programming value while in the programming mode. When this pushbutton is held

down, the displayed value will be “decremented” to a lower value as desired. NOTE:

The longer the pushbutton is held down, the faster the value will be decremented.

 INCREMENT pushbutton. The INCREMENT function is used to change a

programming value while in the programming mode. When this pushbutton is held

down, the displayed value will be “incremented” to a higher value as desired. NOTE:

The longer the pushbutton is held down, the faster the value will be incremented.

 ENTER pushbutton. The ENTER function is used to scroll forwards through the status

menus or programming prompts to the next item. The ENTER function is used to

“enter” and accept new programming or operating mode changes after a new value

has been selected (NOTE: Pressing the Exit button instead of the Enter button will

reject the newly selected value and retain the original value). NOTE: In the

programming mode, the longer the ENTER pushbutton is held down, the faster the

next menu prompt will appear.

 Load on Utility supply LED light viewing window

 Load on Generator supply LED light viewing window

NOTE: A lamp test feature is provided to test all LED lights as well as the LCD display.

To activate the lamp test feature, simultaneously push the INCREMENT and

DECREMENT pushbuttons. All LEDs and LCD display pixels should illuminate for

approximately 2 seconds then return to their original status. The Lamp Test feature is

also used to clear active fault conditions and return the controller to normal operation.

NOTE: An active Timer Bypass feature is provided to allow a manual initiated bypass.

To activate the feature, simultaneously push the DECREMENT and ENTER

pushbuttons. The previously bypassed timer will operate normally during its next

cycle. Refer to Timer Bypass section for related timers.

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TSC 800 TRANSFER SWITCH CONTROLLER

4 3 2 1

HD2

WATCHDOG

ENGINE START

TRANSFER
TO UTILITY

TRANSFER
TO GENERATOR

UTILIT Y SUPPLY

TRANSFORMER

CONTRAST

GENERATOR SUPPLY

TRANSFORMER

HD1

TB3

TB2

1

2

3

4

1

12

1

1

J7

COMM

RJ45

Connector

TB1

5

4

3

2

1

G;\ENGINEER\PRODUCTS\TSC800\852613b.VSD

FIGURE # 8

3.2. PRINTED CIRCUIT BOARD

18

9

8

7

6

10

The printed circuit board (PCB) is shown in FIGURE 8. The PCB contains the following user

interface items:

3.2.1. POWER SUPPLY INPUT VOLTAGE SELECTION

The controller power supply input voltage level selection is made via two connector

plugs, which are located on the PCB and are identified as HD1 and HD2. Voltage

selection plug assemblies are unique for each power supply input level voltage

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TSC 800 TRANSFER SWITCH CONTROLLER

arrangement and must match the intended voltage level. Controller failure may result

if incorrectly configured.

The TSC 800 is factory configured for a specific power supply voltage input as

designated by voltage header plugs labeled as follows:

115V - designates a 115V power supply input voltage

230V - designates a 230V power supply input voltage

3.2.2. TERMINAL BLOCKS

Three terminal blocks are located on the PCB as follows:

TB1 High voltage sensing terminal block (120-600VAC)

WARNING

Voltage sensing circuits are capable of lethal voltages while

energized. Standard safety procedures should be followed and

be performed by qualified personnel only. Failure to do so may

cause personnel injury and/or death.

TB2 Transfer control terminal block for output contacts and low voltage inputs

TB3 Transfer control terminal block for 115/230v input and output circuits

3.2.3. DIAGNOSTIC LEDs

The TSC 800 controller provides four diagnostic LED lights that are mounted on the

rear of the printed circuit board as per FIGURE 8. Their functions are described as

follows:

WATCHDOG This LED flashes on and off at irregular intervals that

indicate that the microprocessor is functioning

normally.

ENGINE START This LED is illuminated whenever the TSC 800 is

initiating an Engine Start (except when there is no

power to the TSC 800 controller).

TRANSFER TO UTILITY This LED is illuminated whenever the TSC 800 is

initiating a Transfer to Utility signal.

TRANSFER TO GEN This LED is illuminated whenever the TSC 800 is

initiating a Transfer to Generator signal.

NOTE: All LEDs will be illuminated whenever a lamp test function is performed.

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TSC 800 TRANSFER SWITCH CONTROLLER

3.2.4. COMMUNICATION PORT

A communication port is provided to interconnect to a remote communication system

for remote monitoring and control of the transfer switch. Refer to Section 4 for

additional information.

3.2.5. CONTRAST ADJUSTMENT

A contrast adjustment potentiometer is located on the PCB and is factory set for

ambient temperatures of 15° to 30° Celsius. For different ambient temperatures,

consult the factory for adjustment procedures.

4. REMOTE COMMUNICATION

The TSC 800 transfer switch controller is available with a remote communication feature. The remote

communication feature allows a TSC 800 controller to be monitored and controlled from a remote

location via serial communication link to a personal computer (PC). PC’s may be connected locally

via serial communication cable to the TSC 800 or remotely via modem and telephone systems.

Remote communication can be via customer-supplied equipment or with an external communication

interface module (CIM) as manufactured by Thomson Technology.

NOTE:

The CIM module may be located in the engine control panel

provided the maximum distance between the CIM and TSC 800

controller is not exceeded as per the following information.

Refer to the installation section of this manual for further

information.

The CIM module utilizes an internal modem and contains ModbusTM protocol to interface with different

remote monitoring software programs. Refer to separate literature for detailed information on the

CIM module.

The TSC 800 communication port utilizes a RS422 data transmission signal that is directly

interconnected to the CIM module via an 8 conductor, shielded cable with plug-in RJ45 connectors.

Refer to FIGURES 9 & 10 for detailed information on direct connected or remote connected PC

applications with CIM module.

TM

Trademarks belong to their respective parties.

NOTE: Both phone and serial communications ports cannot be connected at the same time. Doing

so will result in no communication and/or possible CIM failure.

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TSC 800 TRANSFER SWITCH CONTROLLER

CIM

Communication

Interface Module

+-

Phone

no connection

Port 2A

G

GRD

Port 3B

GRD

TSC 800
Transfer

Controller

RS 232 Signal

15M (50ft)**

maximum

cable length

null modem

connector

Personal

Computer

DC Power

8-35Vdc

**Communication cable wiring must be suitably routed to
protect it from sources of electrical interference. Refer to
installation section for further information.

8 conductor

Shielded Cable c/w

RJ45 connectors

305M
(1000ft)**
maximum

cable length

G:\ENGINEER\PRODUCTS\TSC800\852621.VSD

FIGURE #9 TSC 800 WITH CIM MODULE & DIRECT CONNECTED PC (RS232)

CIM

Communication

Interface Module

+-

Phone

Port 2A

no connection

G

GRD

Port 3B

DC Power

8-35Vdc

TSC 800

Transfer

Controller

GRD

8 conductor

Shielded Cable c/w

RJ45 connectors

305M (1000ft)**

maximum

cable length

**Communication cable wiring must be suitably routed to

Modem

Personal

Computer

protect it from sources of electrical interference. Refer to
installation section for further information.

G:\ENGINEER\PRODUCTS\TSC800\852622.VSD

FIGURE #10 TSC 800 WITH CIM MODULE & REMOTE CONNECTED PC

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TSC 800 TRANSFER SWITCH CONTROLLER

The TSC 800 RS422 communication port allows multiple TSC 800 controllers to be directly

interconnected together to form a single network system. Up to 10 TSC 800 controllers may be

interconnected to a single CIM module.

NOTE:

TSC 800 controllers and MEC 20 engine-generator controllers

may be interconnected together via the same communication

network provided the maximum number of controllers and

interconnection distances are not exceeded. For additional

information, refer to associated product instruction manuals.

Each TSC 800 controller is programmed with a unique communication node address number for the

remote communication system to reference. The network system may be connected to a local PC or

to a remote PC via telephone system and CIM module. Refer to FIGURE #11 for a typical TSC 800

network system with CIM module.

Communication

Interface Module

Phone

Port 2A

no connection

THS

Modem

**Communication cable wiring must be
suitably routed to protect it from sources of
electrical interference. Refer to installation
section for further information.

Personal

Computer

CIM

+-

G

GRD

Port 3B

DC Power

8-35Vdc

8 conductor

Shielded Cable c/w

RJ45 connectors

GRD

305M

(1000ft)**

maximum

cable length

GRD

GRD

TSC 800
Transfer

Controller

#1

TSC 800
Transfer

Controller

#2

TSC 800
Transfer

Controller

#3

To additional TSC 800 controllers

(maximum 10 total per network)

G:\ENGINEER\PRODUCTS\TSC800\852623.VSD

FIGURE #11 NETWORKED TSC 800 INTERCONNECTION DIAGRAM

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TSC 800 TRANSFER SWITCH CONTROLLER

5. TSC 800 DISPLAY MENUS

The TSC 800 contains a Liquid Crystal Display (LCD) that is visible on the front faceplate. The LCD

has pre-programmed display menus which are automatically displayed in an auto-Scrolling mode or

they may be selected manually by pressing the ENTER or EXIT pushbuttons in succession until the

desired menu is displayed. The display menu types and order in which they are programmed are as

follows:

NOTE:

The following display menus are provided in TSC 800 Software

version 2.0 (or higher).

SYSTEM TIME

STATS MENU

ATS MODE MENU



PROGRAM MENU

SYSTEM STATUS TIMER COUNTDOWN

UTILITY SUPPLY MENU

GEN SUPPLY MENU



NOTE: ATS MODE MENU access may be inhibited. Refer to programming instruction

for further details.

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TSC 800 TRANSFER SWITCH CONTROLLER

5.1. SYSTEM TIME MENU

The system time menu is used to show current system time and week number. The TSC 800

controller uses its internal time clock to reference when an automatic exercising operation (if

pre-programmed) is to occur. To change the system time, refer to the “time clock adjustment”

section of this manual. Should control power be lost to the TSC 800 controller for longer than

1-5 minutes, the time clock setting will be saved at the last time value. When the controller is

re-energized, the time setting will indicate the approximate time when the controller lost power

and then will resume keeping system Time. To re-adjust the system time clock, refer to

section 6.3.

NOTE:

The following system Time menu is provided in TSC 800

Software version 2.0 (or higher).

LCD DISPLAY

System Time



Mon



Displays the day of the week (e.g. Monday)



Displays the week number (e.g. 1-4)



Displays the current time in hours (24-hour clock): hour: min: seconds



1

12:24:31



5.2. ATS MODE MENU

The ATS Mode Menu provides manually selectable operating modes which includes

On/Offload testing features (comparable features also available via external inputs utilizing an

optional FTS4 selector switch). The Internal and External ATS Mode inputs operate in a

parallel fashion; the Mode of Operation will be determined by the highest priority selected by

either format. The priority levels are as follows (highest to lowest priority):

1) Off (Controller out of Service, no control logic applied)

2) Onload Test

3) Offload Test

4) Auto

A utility power failure will over ride all but “Off”. In the event of a generator failure and the

utility supply is available and considered normal, the ATS will return to the utility supply except

when “Off” selected.

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE:

The following test menu is provided in TSC 800 Software

version 2.0 (or higher).

The ATS Mode sub-menus are organized as follows:

ATS Mode Menu No

Yes Auto (Automatic Operation & Programmed Test Mode)

Offload Test Continuous Test

Onload Test

Off (Controller Disabled) Timed Test: Selectable

15 - 240 Min.

Automatic Return to “Auto Mode”

LCD DISPLAY

ATS Mode Menu



No



Displays two messages that may be toggled between YES or NO by pressing the

INCREMENT or DECREMENT pushbuttons. Their functions are described as follows:

No Status message only, a change is required to gain access.

Yes The required variable to be entered to gain access and proceed. If the

password protect feature is enabled a prompt will appear requiring a

level 2 or greater security code be entered to allow a read-write access.

Entering a level 1 password will only permit a read only access.

The following ATS Mode Menu options are provided:

Auto This is the Default Selection and is required to enable all automatic

features of the controller. In this mode the TSC 800 Controller will

automatically transfer the load to the appropriate source based on

availability (the Utility supply is considered the preferred source). The

TSC 800 will provide automatic timed testing if enabled in programming.

Manual testing is disabled when the Auto ATS mode is selected (NOTE:

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TSC 800 TRANSFER SWITCH CONTROLLER

the external mode inputs input will over ride ATS Mode Menu selected

Auto mode).

Offload Test When the Offload Test prompt is selected and entered, the generator

will immediately start and operate offload and will not permit a load

transfer. The test menu will display Continuous Test, to select a timed

test use the INCREMENT or DECREMENT pushbutton to scroll and

select a test duration time, press enter to accept the time (selectable in

15 minutes increments from 15 – 240 min.). The generator will remain

running until a different mode is selected and entered or the timed test

duration expires (selecting Auto will immediately terminate the test). On

expiry of the timed test the operating mode automatically reverts to

Auto.

NOTE: If the Utility supply fails during this test mode, the load will

automatically transfer to the generator if within acceptable limits.

Onload Test When the Onload Test prompt is selected and entered, the generator

will immediately start and transfer on load. The test menu will display

Continuous Test, to select a timed test use the INCREMENT or

DECREMENT pushbutton to scroll and select a test duration time, press

enter to accept the time (selectable in 15 minutes increments from 15 –

240 min.). The generator will remain running until a different mode is

selected and entered or the timed test duration expires (selecting Auto

will terminate the test after the Utility Return Timer has expired). On

expiry of the timed test the operating mode automatically reverts to

Auto.

NOTE: Should the Generator fail during the onload test and the Utility

supply is available and within acceptable limits the load will be

transferred on expiry of the generator under voltage delays.

Off The TSC 800 Controller is considered out of Service. The transfer

mechanism logic outputs are dropped out and disabled. The transfer

switch will remain in its last position and the remote start removed if

previously enabled. Manual and auto test features are disabled. This

selection takes precedence over all other modes.

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE: When this mode is selected the local generator controls should

also be placed in OFF. Failing to do can result in cyclical engine

starting. On loss of Utility supply in this state (loss of control power to

the TSC 800) the engine start contact will drop out after approximately 4

minutes resulting in generator starting and stopping (the cycle will

repeat approximately every 4 minutes after the control power is

removed).

NOTE: On return to normal service the Engine Start output is inhibited

(held up) for approximately 8 – 10 seconds. Requesting another mode

of operation during this time, which requires the engine start contact to

close, will be ignored.

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TSC 800 TRANSFER SWITCH CONTROLLER

5.3. TSC 800 PROGRAM MENU

The programming menu is used to access the TSC 800’s programmable functions such as

time delays, voltage/frequency setpoints, calibration and time clock adjustments.

Access to the programming sub-menus can only be obtained with a security password

number. The sub menus are organized as follows:

Programming Menu No

Yes Password

LCD DISPLAY

Program Menu



No



Displays two messages that may be toggled between YES or NO by pressing the

INCREMENT or DECREMENT pushbuttons. Their functions are described as follows:

NO Status message only, a change is required to gain access.

YES The required variable to be entered to gain access and proceed. The password

protection prompt will appear requiring a level 2 or greater security code be

entered to provide a read-write access. Entering a level 1 password will permit

a read only access.

5.4. SYSTEM OPERATION MENU

The system operation menu provides the operator with information as to current status of both

the utility and generator supplies.

NOTE:

The system operation menu screen may be momentarily

replaced with a time delay countdown screen when a

transfer sequence is initiated. The display will

automatically return to the previous menu following expiry

of the timing sequence.

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TSC 800 TRANSFER SWITCH CONTROLLER

The system operation sub-menus are organized as follows:

Utility Normal

Failed
Return Delay

Gen ATS In OFF
In Auto
Starting
Failed
Running
Normal
Cooling
Auto Offload Test

Manual Offload Test
Auto Onload Test
Manual Onload Test
Commit To Transfer

LCD DISPLAY

Util Normal

Gen Onload Test



Displays utility supply status conditions. There are three status conditions:





Normal Load is on the utility supply and the utility’s voltage and

frequency is normal.

Failed Utility supply voltage and/or frequency are outside the

nominal programmed limits (e.g. failed condition).

Return Delay Load is on the generator supply and the utility supply is

ready to transfer. This is a temporary condition due to either

a test mode being selected or during a utility return time

delay.



Displays generator supply status conditions. There are twelve status conditions as

follows:

ATS In Off The ATS Mode has been set to OFF via the Internal or

External switch input. The Controller will display the

message “Controller Out of Service”.

In Auto The ATS Mode via the Internal ATS Mode Menu has been

set to Auto.

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TSC 800 TRANSFER SWITCH CONTROLLER

Starting Engine start signal has been initiated, and the TSC 800

sensors are waiting for generator voltage to build up.

Failed Generator is signaled to operate; however its voltage

and/or frequency is outside the nominal programmed limits

(e.g. failed condition).

Running The generator is running (within programmed limits) but

not requested to transfer on load by the controller.

Normal The generator is running due to a failed utility supply.

Cooling The generator is running (within programmed limits) during

the programmed cooldown delay.

Auto Offload Test The generator is running off load due to a

programmed exercise timer mode.

Manual Offload Test The generator is running off load due to manually

initiated off load test mode via the front-panel

pushbuttons or external inputs.

Auto Onload Test The generator is running on load due to a

programmed exercise timer mode.

Manual Onload Test The generator is running on load due to manually

initiated on load test mode via the front-panel

pushbuttons or external inputs.

Commit To Transfer When enabled, the generator will be committed to

transferring onload if the loss of utility is detected

and the engine start issued. The generator will

remain onload for the duration of the power failure

and the transfer return time. If the generator fails

to start within 5 minutes the commit to transfer

request is cancelled.

5.5. TIMER COUNTDOWN MENUS

Timer countdown menus are automatically displayed when a specific time delay function

occurs during a transfer sequence. When a time delay begins, the LCD display will indicate

the time delay function name (e.g. Gen Start Delay) and the current time remaining in the

countdown sequence. When the timing function is complete, the LCD display will

automatically change to either the next timing sequence countdown display or return to auto

scrolling the system status screens.

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TSC 800 TRANSFER SWITCH CONTROLLER

LCD DISPLAY

Gen Start

Delay



Displays specific time delay function currently in operation



Displays current time in seconds that are left in the specific timing sequence.

45 Sec





NOTE:

During a timer countdown sequence, scrolling to

a different display screen is possible by pressing

either the ENTER or EXIT pushbuttons.

The following timer countdown screens are provided and displayed in seconds of time

remaining:

Gen Start Delay Gen Warm up Delay

Gen Cooling Delay Utility Return Delay

PreTransfer Delay PostTransfer Delay

Finding Neutral Neutral Delay

PSD Max Open Time Transferring

Syncing (Close Transition Feature Only)

5.6. UTILITY SUPPLY MENU

The utility supply menu allows the operator to view the utility supply voltage and frequency

values.

LCD DISPLAY

600





Util 60.0Hz



600

600



Displays utility supply frequency in hertz (Hz). The frequency is displayed with a



resolution of 1/10 of a hertz.



Displays utility supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases A to B

• 1-phase system: LINE TO LINE VOLTAGE--Phases L1 to L2



Displays utility supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases B to C

• 1-phase system: LINE TO NEUTRAL VOLTAGE--Phases L1 to N

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TSC 800 TRANSFER SWITCH CONTROLLER



Displays utility supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases C to A

• 1-phase system: LINE TO NEUTRAL VOLTAGE--Phases L2 to N

5.7. GENERATOR SUPPLY MENU

The generator supply menu allows the operator to view the generator supply voltage and

frequency values.

LCD DISPLAY

600





Gen 60.0Hz



600

600



Displays generator supply frequency in hertz (Hz). The frequency is displayed with a



resolution of 1/10 of a hertz.



Displays generator supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases A to B

• 1-phase system: LINE TO LINE VOLTAGE--Phases L1 to L2



Displays generator supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases B to C

• 1-phase system: LINE TO NEUTRAL VOLTAGE--Phases L1 to N



Displays generator supply voltage as follows:

• 3-phase system: LINE TO LINE VOLTAGE--Phases C to A

• 1-phase system: LINE TO NEUTRAL VOLTAGE--Phases L2 to N

NOTE: The load bus voltages are viewable only in the Programming Menu. When

selected as 3-phase load sensing it will be displayed as listed above for 3-phase

systems. When selected as 1-phase, only the L1 to L2 voltage will be displayed as a

line-to-line value. 3-phase load sensing can only be selected if all 3 phases of the load

bus are wired to the TSC 800 controller. Most transfer switches manufactured prior to

December 2004 will not have the C phase load bus wiring installed and must be set for

1-phase load sensing.

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TSC 800 TRANSFER SWITCH CONTROLLER

5.8. STATS MENU

The STATS menu displays the recorded data logging for the following events:

NOTE:

The following stats menu is provided in TSC 800 Software

version 2.0 (or higher).

o Total Number of Transfers

o Total Number of Transfers due to source failure

o Number of Hours Controller is energized

o Number of Hours Load is on Utility

o Number of Hours Load is on Generator

The TSC 800 data logging has the maximum number of events memory as follows:

o The limit for the Total Transfers and SRC Fail Transfers is 10,000.

o The limit for the Total Hours, Load On SRC1 Hours, and Load On SRC2 Hours

is 160,000 hours.

LCD DISPLAY

Total Transfers



20



Displays the recorded data

NOTE: Zeroing of the Statistic Records can be accessed by entering the Program Menu with

a master password number. Consult THOMSON TECHNOLOGY factory for master password

number if required.

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TSC 800 TRANSFER SWITCH CONTROLLER

6. OPERATING INSTRUCTIONS

To operate the TSC 800 controller and associated transfer switch using the front faceplate

pushbuttons, refer to the following detailed operating instruction sub-section descriptions.

6.1. AUTOMATIC SEQUENCE OF OPERATION

6.1.1. NORMAL SEQUENCE OF OPERATION (OPEN TRANSITION
TRANSFER)

Under normal operating conditions, the transfer switch operates automatically during a

failure and restoration of utility power and does not require operator intervention.

NOTE:

Refer to sections 6.5 & 6.10 which may require operator

intervention

When utility supply voltage drops below a preset nominal value (70 – 99% of rated

adjustable) on any phase, an engine start delay circuit will be initiated. Following

expiry of the engine start delay period (0 - 60 sec. adjustable) an engine start signal

(contact closure) will be given.

Once the engine starts, the transfer switch controller will monitor the generators

voltage and frequency levels. Once the generator voltage and frequency rises above

preset values (70 – 99% nominal adjustable) a warm up time delay will be initiated.

Once the warm up timer (0 - 3000 Sec adjustable) expires the transfer to utility supply

signal will be removed (i.e. contact opening) and the transfer to generator supply

signal (contact closure) will be given to the transfer switch mechanism. The load will

then transfer from the utility supply (i.e. opening the utility power switching device) to

the generator supply (closing the generator power switching device) to complete a

break-before-make open transition transfer sequence.

The generator will continue to supply the load until the utility supply has returned and

the retransfer sequence is completed as follows: When the utility supply voltage is

restored to above the present values (70 - 99% of rated adjustable) on all phases, a

utility return delay circuit will be initiated. Following expiry of the utility return timer (0 –

50.0 min. adjustable), the transfer to generator supply signal will be removed (contact

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TSC 800 TRANSFER SWITCH CONTROLLER

opening), the transfer to utility supply signal (contact closure) will be given to the

transfer switch mechanism. The load will then be transferred from the generator

supply back to the utility supply. During the utility re-transfer sequence a neutral

position delay circuit can be employed which will cause the transfer mechanism to

pause in the “neutral position (i.e. with both transfer power switching devices open) for

the duration of the neutral delay timer (0 -120 seconds adjustable) setting, once the

time delay expires, the re-transfer sequence will be completed. The Neutral Delay

Bypass feature can also be enabled to detect when all load phases voltages have

dropped below 20% of the nominal system voltage, which will cancel any remaining

Neutral Delay time and complete the transfer.

An engine cooldown timer circuit will be initiated once the load is transferred from the

generator supply and determined to have made position by ensuring the load bus is

energized and the Utility position indication confirmed. Following expiry of the

cooldown delay period (0 – 50.0 min. adjustable) the engine start signal will be

removed (remote start contact opened) to initiate stopping of the generator set.

6.1.2. NORMAL SEQUENCE OF OPERATION (CLOSED TRANSITION
TRANSFER)

For transfer switches equipped with the closed transition transfer option, the TSC 800

is configured to provide additional logic for this application. When the TSC 800

controller receives an input signal for Closed Transition Transfer Mode (contact closing

on TB2-12) the TSC 800 is configured to operate as follows:

Under normal closed transition operating conditions, the transfer switch operates

automatically during a failure and restoration of utility power and does not require

operator intervention.

When utility supply voltage drops below a preset nominal value (70 - 99% of nominal,

adjustable) on any phase, an engine start delay circuit will be initiated. Following

expiry of the engine start delay period (0 - 60 sec. adjustable) an engine start signal

(contact closure) will be given.

Once the engine starts, the transfer switch controller will monitor the generator voltage

and frequency levels. When the generator voltage and frequency rises above preset

values (70 - 99% of nominal, adjustable) a warm up time delay will be initiated. When

the warm up timer (0 – 3000 Sec. adjustable) expires the transfer to utility supply

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TSC 800 TRANSFER SWITCH CONTROLLER

signal will be removed (logic contact(s) opening) and the transfer to generator supply

signal (logic contact(s) closure) will be given to the transfer switch Power Switching

Devices. The load will then transfer from the utility supply (i.e. opening the utility

power switching device) to the generator supply (closing the generator power switching

device) to complete a break-before-make open transition transfer sequence.

The generator will continue to supply the load until the utility supply has returned and

the retransfer sequence is completed as follows: When the utility supply voltage is

restored to above the present values (70 - 99% of rated adjustable) on all phases, a

re-transfer sequence will be initiated once the Utility Return timer expires. The utility

will close its power-switching device when it is in synchronism with the generator

supply via external logic device. If the transfer switch is supplied with a “Momentary”

Closed Transition transfer control option, the generator power switching device will

immediately trip open approximately 50-100 milliseconds after the utility power

switching device closes to complete the “make-before-break” re-transfer sequence. If

the transfer switch is supplied with a “Soft-Load” Closed Transition transfer control

option, the generator power switching device will remain closed for approximately 5-10

seconds to allow a soft-load power transfer sequence to be completed as controlled by

an external device. The generator power switching device will then trip open to

complete the “make-before-break” re-transfer sequence.

An engine cooldown timer circuit will be initiated once the load is transferred from the

generator supply and determined to have made position by ensuring the load bus is

energized and the utility position indication confirmed. Following expiry of the

cooldown delay period (0.0 – 50.0 min. adjustable) the engine start signal will be

removed (remote start contact opened) to initiate stopping of the generator set.

6.1.3. TEST MODE SEQUENCE OF OPERATION

6.1.3.1. TEST CONDITION (OPEN TRANSITION TRANSFER)

When an operator selects a test mode it shall signal a simulated utility power fail signal

to the transfer switch controller. The transfer switch shall operate as per a normal

utility power fail condition. The neutral delay circuit logic will be active during transfer

to and from the generator supply (i.e. when both sources of power are available). (For

definitions and added features refer to Section 7.5.12.)

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TSC 800 TRANSFER SWITCH CONTROLLER

The transfer switch shall remain on generator supply until the test mode is terminated.

It will then re-transfer back to the utility supply and continue to operate the generator

set for its cooldown period then stop.

6.1.3.2. TEST CONDITION (CLOSED TRANSITION TRANSFER)

When a load test is initiated in the closed transition transfer mode, the generator will

start and following its warm up delay, the generator will close its power-switching

device when it is in synchronism with the utility supply via external logic device. If the

transfer switch is supplied with a “Momentary” Closed Transition transfer control

option, the utility power switching device will immediately trip open approximately 50-

100 milliseconds after the generator power switching device closes to complete the

“make-before-break” transfer sequence. If the transfer switch is supplied with a “Soft-

Load” Closed Transition transfer control option, the utility power switching device will

remain closed for approximately 5-10 seconds to allow a soft-load power transfer

sequence to be completed as controlled by an external device. The utility power

switching device will then trip open to complete the “make-before-break” transfer

sequence..

The generator will continue to supply the load until the test mode has been removed

and the re-transfer sequence is completed as follows: The utility power-switching

device will close when it is in synchronism with the generator supply via external logic

device.. If the transfer switch is supplied with a “Momentary” Closed Transition transfer

control option, the generator power switching device will immediately trip open

approximately 50-100 milliseconds after the utility power switching device closes to

complete the “make-before-break” re-transfer sequence. If the transfer switch is

supplied with a “Soft-Load” Closed Transition transfer control option, the generator

power switching device will remain closed for approximately 5-10 seconds to allow a

soft-load power transfer sequence to be completed as controlled by an external device.

The generator power switching device will then trip open to complete the “make-

before-break” re-transfer sequence.

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TSC 800 TRANSFER SWITCH CONTROLLER

6.1.4. ABNORMAL SEQUENCE OF OPERATION

6.1.4.1. GENERATOR FAILURE ON LOAD

Should the generator set fail while on load, the transfer switch shall re-transfer

the load back to the utility supply if within nominal limits. The utility return timer

will be bypassed in this condition.

NOTE:

This operating condition applies to a normal utility failure as well

as any test condition.

6.1.4.2. TRANSFER SWITCH FAIL ALARM LOGIC

The TSC 800 controller contains logic to detect a transfer mechanism failure.

Should a failure be detected, a forced transfer to the alternate supply will be

initiated if the TSC 800 is programmed for force transfer. Refer to the
programming Section 7.5.14 for further information in Force Transfer operation.

6.1.4.3. SERVICE ENTRANCE ATS

For Service Entrance Rated transfer switch applications, the transfer switch

control logic will include external wiring to signal the transfer switch mechanism

to move to the “Service Disconnected” position when Service Disconnect

Operation is required. In this mode the TSC 800’s transfer control outputs and

Transfer Fail feature is disabled. On return to Service the TCS 800 will display

“Resuming Normal Operation” and the Power-Switching Device will be closed

to the utility supply. Should the utility supply be out of limits the generator will

be issued a start command and the load transfer to the generator supply once

its warm-up time has expired. The ATS returns to Auto control and will return

to the utility supply as previously describe for the appropriate ATS design type.

NOTE: On return to Normal Service the Engine Start output is inhibited (held

up) for approximately 8 – 10 seconds. Requesting another mode of operation

requiring the engine start contact to close will be ignored until this timer expires.

6.2. LCD DISPLAY OPERATION

The TSC 800 LCD display will operate in the following modes:

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE:

The following LCD operation is provided in TSC 800 Software

version 2.0 (or higher).

 SLEEP Mode: The LCD display will automatically turn off and go in to a “sleep” mode

to preserve operating life time. The sleep mode will be activated if a faceplate key

press is not activated within a 16 minute time period. Pressing any faceplate key will

automatically reactivate the LCD display.

 AUTO SCROLLING Mode: The LCD will automatically scroll through a series of

display menu screens at a rate of 1 screen every 3 seconds. Pressing any faceplate

key while the display is on the desired menu screen will automatically stop the

scrolling feature. The auto-scrolling feature will be re-activated 120 seconds later if no

key presses are made. To view other menus once the auto scrolling has been de-

activated, press the ENTER or EXIT pushbuttons to scroll to the next available menu.

NOTE that the menu list will automatically loop back to the first menu item when the

end of the list is reached.

 BACK LIGHT Mode: The LCD incorporates a back light feature. When any keypad is

pressed the back light will illuminate for 120 seconds.

 AUTO EXIT PROGRAMMING Mode: The LCD display will automatically exit the

programming menu and return to auto scrolling mode if no keypad is depressed within

5 minutes.

6.3 TIME CLOCK ADJUSTMENT

To adjust the TSC 800 controller’s internal time clock, follow the detailed procedure below.

NOTE: Normal utility or generator control power to the controller must be available to permit

adjustment.

• Using the ENTER or EXIT pushbutton, scroll to the Program Menu.

• Using the INCREMENT pushbutton, select the Yes message and press the

ENTER pushbutton.

• Press the ENTER pushbutton when the Password message is displayed.

• Using the INCREMENT pushbutton, select the current Day of the week message

and week number (1-4) and press the ENTER pushbutton.

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE:

Week Number is programmable only if the System Time Clock

Rollover period is set longer than 7 days. Refer to Programming

section for further details.

• Using the INCREMENT pushbutton, select the current Hour of the day (e.g. 24

hour clock) and press the ENTER pushbutton.

• Using the INCREMENT pushbutton, select the current Minute of the day (e.g. 60

minute) and press the ENTER pushbutton.

• Press the EXIT pushbutton and hold for 2 seconds to exit the time clock

adjustment mode (Automatic exit if no keypad depressed within 5 minutes).

6.4 TEST MODES

6.4.1 OPERATOR INITIATED UTILITY POWER FAIL SIMULATION (LOAD

TEST)

To perform a testing operation on the transfer switch using the front faceplate

pushbuttons, follow the procedure listed below.

To Initiate the Load Test Mode:

• Using the ENTER pushbutton, scroll to the ATS Mode Menu.

• Using the INCREMENT pushbutton, select the Yes message and press the

ENTER pushbutton.

• Using the INCREMENT pushbutton, select the Onload or Offload test option

as required.

• Press the ENTER pushbutton.

• Continuous Test will be displayed (no time out). Using the INCREMENT

pushbutton, a timed test can be selected if the desired, duration of Test

Mode Time Out is selectable in 15-minute increments from 15 – 240

minutes.

• Press the ENTER pushbutton.

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TSC 800 TRANSFER SWITCH CONTROLLER

To Exit the Test Mode:

• Using the ENTER pushbutton, scroll to the ATS Mode Menu.

• Using the INCREMENT pushbutton, select the Yes message and press the

ENTER pushbutton.

• Using the INCREMENT pushbutton, select Auto.

• Press the ENTER pushbutton. After the Utility Return Timer has expired the

transfer of the load from the generator to the utility supply will be initiated.

6.4.2 AUTOMATIC PLANT EXERCISE TEST

To initiate an automatic plant exercise test mode, the TSC 800 must be pre-

programmed for the desired start/stop times, frequency of the test and type of test (i.e.

Onload, Offload).

Refer to the Programming section for details on programming.

Once the plant exercise timer is programmed, the engine will immediately start at the

selected time and transfer on load (if Onload is selected) once nominal voltage and

frequency levels have been obtained. The engine will remain operating until the stop

time is reached, then the load will re-transfer back to the utility supply after the utility

return timer has expired. The generator will repeat the test sequence as programmed.

6.4.3 FOUR FUNCTION REMOTE TEST (FTS4 OPTION)

The function of the Four Position Test Switch Input is to allow operators to select

various operating scenarios for test or maintenance purposes, in addition to the use of

the faceplate mounted pushbuttons.

NOTE: When an external FTS4 switch is used, the TSC 800 operation will be based

on the highest priority of either the internal ATS Mode or the external FTS4 inputs to

the controller.

Mode Priority: 1 Off, 2 Onload Test, 3 Offload Test & 4 Auto

Off: Disables the engine start output from the transfer switch

(FTS4 only). TSC 800 will display “Controller Out of

Service”. All transfer logic outputs are dropped out

(disabled). The transfer switch will not provide automatic

control in the event of a power failure. Engine start output on

the controller is dropped out. (Place generator controls in

OFF if continuous running of the generator is not desired.)

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE: Moving FTS4 out of OFF will display “Resuming

Normal Operation” and the ATS will source the

appropriate supply.

NOTE: On return to Normal Service the Engine Start output

is inhibited (held up) for approximately 8 – 10 seconds.

Requesting another mode of operation during this time,

which requires the engine start contact to close, will be

ignored.

Auto: All automatic functions are enabled.

Engine Start: (Offload Test) An engine start signal will be initiated and will

remain on until the FTS4 is placed in another position. The

engine will start if the engine’s auto start controller is in the

”Auto” mode. If the primary source fails in this mode, and the

secondary source is within parameters, the TSC 800 will

initiate a transfer to the secondary source.

Test: (Onload Test) A primary source failure is simulated and an

engine start signal will be initiated. When the secondary

source is within normal limits, the TSC 800 will initiate a

transfer to the secondary source. The system will remain in

this state until the FTS4 is placed in another position or the

secondary supply fails. Upon a secondary supply failure, if

the primary supply is available, the TSC 800 will initiate a

transfer to the primary supply. The Utility Return time

sequence will be initiated when the Onload Test mode is

terminated. Once transfer is complete to the primary source

the engine cooldown time sequence will be initiated, on

expiry, the generator set will stop if no cooldown is included

in its design/programming.

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TSC 800 TRANSFER SWITCH CONTROLLER

6.5 TRANSFER FAIL FAULT RESET

To reset a Transfer Fail condition (i.e. When the LCD Display indicates the applicable fault

condition and the “Press Lamp Test” alarm message), press and hold the DECREMENT &

INCREMENT keys simultaneously.

Once the alarm condition is reset, the load will automatically retransfer back to the original

source if within normal limits.

NOTE:

Refer to section 7.5.14 for further details.

6.6 LAMP TEST

To initiate a Lamp Test, press and hold the DECREMENT & INCREMENT keys

simultaneously until all LEDs & LCD segments illuminate.

6.7 TIMER BYPASS

The following automatic sequencing time delays can be temporarily bypassed when the time

function is active as shown on the TSC 800 LCD display:

NOTE:

Timer Bypass feature is provided in TSC 800 Software version

2.0 (or higher).

 Utility Return Timer

 Cooldown Timer

 Warm up Timer

This feature is typically used when testing to avoid waiting for the complete duration of the

time period.

To activate the bypass function, simultaneously press the DECREMENT and the ENTER keys

during the timer operation.

NOTE: The Time delay functions will return to the normal time settings on the subsequent

automatic operating sequence.

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TSC 800 TRANSFER SWITCH CONTROLLER

6.8 MANUAL UTILITY RE-TRANSFER

If the TSC 800 is programmed to provide a Manual Utility Re-transfer Sequence, an operator

must initiate the re-transfer sequence when the utility supply has returned to normal following

a utility power failure and TSC 800 LCD message “ Util Return” – “Press Lamp Test “.

NOTE:

Manual Re-transfer feature is provided in TSC 800 Software

version 2.0 (or higher). Programmed Utility Return Delay Time

is not included to ensure stable utility supply prior to retransfer.

6.9 SERVICE ENTRANCE ATS MODE

For transfer switches equipped with the Service Entrance Mode option, the TSC 800 is

configured to provide additional logic for the application. When the TSC 800 controller

receives an input signal for Service Entrance Mode (contact closing on TB2-15) the TSC 800

will post an alarm message on the LCD display “ Service Disconnecting” when sourcing

neutral position and when both Load on Generator and Utility inputs are de-energized and the

load bus is de-energized will display “Service Disconnected”. The control logic required to

move the ATS mechanism to the neutral position is controlled by external logic and not by the

TSC 800. When in “Service Disconnect” mode all transfer logic outputs are de-energized.

When “Service Disconnect” mode is removed the controller will display “Returning to Service”

and move to the appropriate source depending on availability within programmed limits.

NOTE: On return to Normal Service the Engine Start output is inhibited (held up) for

approximately 8 – 10 seconds. Requesting another mode of operation during this time, which

requires the engine start contact to close, will be ignored.

NOTE:

Service entrance feature is provided in TSC 800 Software version 2.0

(or higher).

6.10 PHASE BALANCE PROTECTION ALARM

When the TSC 800 is programmed with Phase Balance protection enabled, should a transfer

occur due to an out of limit phase balance condition, an alarm message will be shown on the

TSC 800 LCD display “UTIL (or GEN) UNBALANCED”. The Phase Balance feature may be

user programmed to provide two different re-transfer operating sequences (i.e. AUTO or

MANUAL RETRANSFER).

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TSC 800 TRANSFER SWITCH CONTROLLER

When the “AUTO” retransfer mode is selected, the load will be automatically re-transferred

back to the original source and does not require operator intervention.

When the “MANUAL” retransfer mode is selected, a re-transfer back to the original source will

not occur until the LAMP TEST function is activated and alarm is reset by operator

intervention.

For further details on Phase Balance programming refer to section 7.3.17.

NOTE: When in the MANUAL RETRANSFER mode, if the alternate source fails, the alarm

lockout will not be bypassed inhibiting the load to re-transfer back to the original source even

if within limits. The reason the re-transfer is inhibited is phase unbalance is generally only

detected when load is applied to the source and the condition will appear to clear when the

load is removed, as such allowing a re-transfer to the failed source previously determined to

have a phase balance fault will only result in multiple unnecessary transfers of the load

between sources. Retransfer is set to lockout and requires operator intervention.

Phase balance feature is provided in TSC 800 Software version

2.0 (or higher).

7. PROGRAMMING INSTRUCTIONS

7.1. PASSWORDS

Access to the programmable parameters of the TSC 800 Transfer Controller is via a security

password number. Three levels of security passwords are provided as described below:

7.1.1. READ ONLY MODE

User can view the programmable parameters only and cannot change any values.

The Factory default number for the read-only mode is one (1).

NOTE:

7.1.2. READ / WRITE MODE

User can view and modify any programming parameter as required. The Factory

default number for the read/write mode is two (2).

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TSC 800 TRANSFER SWITCH CONTROLLER

7.1.3. MASTER READ / WRITE MODE

User can view/modify any programming parameter as well as view/modify the security

password level numbers. Consult THOMSON TECHNOLOGY factory for master

password number if required.

To enter the programming mode, follow the procedure as shown:

Program Menu

Yes

Select the Program Menu by scrolling through the display screens using the ENTER or

EXIT pushbuttons. When displayed, use the INCREMENT pushbutton to select the

YES prompt and push the ENTER button.

Password

0

Use the INCREMENT or DECREMENT pushbuttons to ramp the displayed number up

or down to the desired password access number. Press the ENTER pushbutton when

the correct number is displayed.

NOTE:

If an invalid number is entered, programming access will be

limited to time clock adjustment only. To exit the programming

mode, press the EXIT pushbutton and hold for two seconds

until the display scrolls rapidly.

When the programming mode is accessed, the programming parameters will be

displayed in the same order as the Programming Data Sheet provided with the

transfer switch. To skip over parameters that do not require changes, push and hold

the ENTER pushbutton until the desired function is displayed. The EXIT pushbutton

may be used to scroll backwards through the programming parameter loop, but only

one keystroke at a time, maintaining it longer than 2 seconds will exit the program

menu.

To change a programmed parameter, use the INCREMENT or DECREMENT

pushbuttons to scroll through the available options or to adjust a value up or down to

the desired number. When the desired option or number is displayed, press the
ENTER pushbutton to accept the new value. Pressing the EXIT pushbutton after a

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TSC 800 TRANSFER SWITCH CONTROLLER

new value is applied will result in the new value being overwritten with the original

value.

If the programming mode is terminated before the last change

had been entered, the programming parameter will remain

unchanged.

To exit the programming mode, press the EXIT pushbutton and hold for two seconds

until the display scrolls rapidly.

7.2. EXERCISE TIMER

The following exercise timer feature is provided in TSC 800

Software version 2.0 (or higher).

NOTE:

NOTE:

The TSC 800 controller has a built-in programmable exercise timer, which allows up to a 4

week (28 day), exercise time period. The timer is fully programmable for, day of week, time of

day, duration of the test and type of test mode (i.e. On Load or Off Load). The exercise timer

utilizes the TSC 800’s internal time clock for referencing all timing functions. The time clock

has a 10-minute power reserve feature to retain correct time settings during short duration

utility power failures. When AC power is removed from the controller, the last time clock

setting will be maintained and will not revert to default setting when the power reserve supply

is fully drained. On re- power-up, the last time setting will be displayed. NOTE: During any On

Load exercise test mode, the transfer switch will automatically re-transfer back to the utility

supply if the generator set fails. To program the exercise timer prompts refer to the following

descriptions:

7.2.1. SYSTEM TIME ROLLOVER

Select the number of days (7, 14, 21, 28) in which the system time clock will rollover

for desired operation of the exercise timer. (Example - If a weekly test schedule is

required at the same time; a 7-day period may be selected, this will have the test

repeat each week at the same time and interval. If the generator set is to be exercised

once a month, a 28-day system rollover should be selected.) The week and day of

week can be selected from any one of the 4 weeks in the list, the test will then repeat

at this selected time and interval.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.2.2. AUTO TEST START DAY/WEEK NUMBER

Select the day of the week (e.g. Monday, Tuesday, etc.) and week number (e.g. 1-4)

that the generator set is to be started to begin its exercise period.

NOTE:

Week Number is programmable only if the System Time Clock

Rollover period is set longer than 7 days.

7.2.3. AUTO TEST START HOUR

Select the hour of the day (e.g. 0-23 hour) that the generator set is to be started to

begin its exercise period.

7.2.4. AUTO TEST START MINUTE

Select the minute of the day (e.g. 0-59 minutes) that the generator set is to be started

to begin its exercise period.

7.2.5. AUTO TEST STOP DAY/WEEK NUMBER

Select the day of the week (e.g. Monday, Tuesday, etc.) and week number (e.g. 1-4)

that the generator set is to be stopped following its exercise period.

NOTE:

Week Number is programmable only if the System Time Clock

Rollover period is set longer than 7 days. Ensure Auto Test

Stop Day/Week/Timer occurs after the Auto Test Start

Day/Week/Timer setting (Generally of the same day/week)

otherwise the generator may operate for an extended period of

time.

7.2.6. AUTO TEST STOP HOUR

Select the hour of the day (e.g. 0-23 hour) that the generator set is to be stopped

following its exercise period.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.2.7. AUTO TEST STOP MINUTE

Select the minute of the day (e.g. 0 to 59 minutes) that the generator set is to be

stopped following its exercise period.

7.2.8. AUTO TEST MODE

Select type of test mode desired. Three test modes are available as follows:

Auto: The exercise test mode is de-activated

Off Load: The generator set will be started during the exercise period but no

transfer will occur.

NOTE: The generator will transfer on load if the utility supply fails during the

test period.

On Load: The generator will be started and will transfer on load.

NOTE: During the On-Load exercise test mode, the transfer switch will

automatically re-transfer back to the utility supply if the generator set fails.

7.3. SYSTEM CONFIGURATION

The TSC 800 controller provides a flexible control system to allow specific operation for a wide

range of power distribution types. To program the system configuration, refer to the following

descriptions:

7.3.1. FIRMWARE VERSION

“Display Only” - The Controller’s current firmware version number and date of release.

7.3.2. ATS MODE MENU PASSWORD (PW)

NOTE:

The following features is provided in TSC 800 Software version 2.0 (or

higher). Viewable only in Master Read / Write Mode.

Allows setting of Password Protection restricting access to the ATS Mode Menu as

follows:

ENABLED: Access to initiating/changing any test or operation mode requires a user-

entered password. The password required will be the same as a level 2

(e.g. read/write password level or higher).

DISABLED: The ATS Mode Menu may be entered and changes made/initiated

without the use of a security password.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.3.3. UTILITY FAIL CALLOUT

NOTE:

The following features are viewable only in Master Read / Write Mode in

TSC 800 Software version 2.0 (or higher).

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when a Utility (Source 1) power failure is

detected. The callout signal will be reset when the Utility (Source 1)

power returns to normal condition.

DISABLED: The controller will not initiate a callout when a Utility (Source 1) power

failure is detected.

7.3.4. LOAD ON GENERATOR CALLOUT

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when the load is connected to the generator

supply. The callout signal will be reset when the load transfers back to

the utility supply.

DISABLED: The controller will not initiate a callout when the load transfers to the

generator supply.

7.3.5. TRANSFER FAIL CALLOUT

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when the transfer switch fails to operate. The

callout signal will only reset when the “Fail to Transfer” alarm is manually

reset via local pushbuttons or with the remote communication software.

DISABLED: The controller will not initiate a callout when a “Fail to Transfer “ alarm

condition occurs.

7.3.6. AUTO TEST CALLOUT

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

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TSC 800 TRANSFER SWITCH CONTROLLER

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when a automated test is initiated at the

controller via the TSC 800 exercise time clock. The callout signal will

reset when the Auto Test condition is terminated.

DISABLED: The controller will not initiate a callout an Auto Test condition is initiated.

7.3.7. MAN TEST CALLOUT

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when a manual test is initiated at the controller

via the TSC 800 pushbuttons or external control switch. The callout

signal will reset when the Manual Test condition is terminated.

DISABLED: The controller will not initiate a callout a Manual Test condition is initiated.

7.3.8. SWITCH NOT IN AUTO CALLOUT

When the remote communication option is enabled, this programming prompt will

appear. This feature may be enabled or disabled by programming selection.

ENABLED: The controller will initiate a callout signal via the communication port to a

remote connected device when the TSC 800 controllers’ operating mode

is “Not In Auto” as locally selected via the four position external control

switch. The callout signal will reset when the control switch is returned to

the Auto position.

DISABLED: The controller will not initiate a callout if the TSC 800 controller is not in

the Auto mode of operation.

7.3.9. NODE ADDRESS

Set to unique controller address (1-255) for use with network connected TSC 800

controllers.

NOTE: This programming feature is only active when the remote communication

option is enabled. Default setting for single TSC 800 applications is 1.

7.3.10. SYSTEM VOLTAGE

Set to nominal system voltage as expressed in “phase to phase” voltage. (e.g. A

347/600 volt system would be entered as “600”.) The programmable range of values

is 120V-15,000V.

7.3.11. VOLTAGE SENSING RATIO

For direct voltage sensing wiring connections from 208 to 600 volts, enter a ratio of

“1.0:1”. When potential transformers are utilized for voltage sensing, enter the

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TSC 800 TRANSFER SWITCH CONTROLLER

transformer ratio. (e.g. When using a 600:120 transformer, enter a ratio of “5.0:1”).

The ratio is programmable in tenths to allow minor correction factors to be used for

non-standard potential transformer ratios.

7.3.12. SYSTEM FREQUENCY

Set to nominal system frequency of either 50Hz or 60Hz.

7.3.13. SYSTEM PHASES

Set to match the power distribution system used on the automatic transfer switch (i.e.

either single phase or 3 phase system).

7.3.14. LOAD SENSING PHASES

NOTE:

The following feature is provided in TSC 800 Software version 2.0 (or

higher).

Set to match the desired method of load bus voltage sensing required for the

application (i.e. either single (1) phase or 3 phase system).

7.3.15. PHASE BALANCE

NOTE:

The following feature is provided in TSC 800 Software version 2.0 (or

higher).

Set to the desired phase balance protection for the utility and generator supply on 3

phase systems. The setting is entered on a percentage basis with a range of 3-30%. If

the monitored supply voltage exceeds the programmed setpoint on any one phase, a

transfer to the alternate source will be initiated following the phase balance time delay

setting. To disable this feature set the percentage to 30%.

NOTE:

The Phase Balance feature and program setting is only enabled when 3

phase sensing is selected.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.3.16. PHASE BALANCE DELAY

Set to the desired time delay for the phase balance protection feature. The

range of settings is 0 to 30 seconds.

NOTE:

THE PHASE BALANCE FEATURE AND PROGRAM

SETTING IS ONLY ENABLED WHEN 3 PHASE

SENSING IS SELECTED.

7.3.17. PHASE BALANCE RETRANSFER

NOTE:

The following feature is provided in TSC 800 Software version 2.1 (or

higher).

When the phase balance feature is enabled, this programming prompt will affect

operation of the retransfer sequence following an abnormal phase balance condition.

Two retransfer modes of operation are selectable as follows:

AUTO: The controller will automatically initiate a retransfer sequence once the

original sources phase balance condition returns within nominal limits as

programmed.

NOTE:

The AUTO mode is the factory default setting for this feature.

MAN: The controller will not automatically initiate a retransfer sequence following a

phase balance alarm condition. To initiate a re-transfer sequence, an operator

must manually reset the phase balance alarm condition by pressing the LAMP

TEST function on the controller faceplate (i.e. press and hold the DECREMENT

& INCREMENT keys simultaneously until the condition is reset.

7.4. VOLTAGE SENSING

The TSC 800 controller provides 3-phase over voltage and under voltage sensing on

both utility and generator supplies. Each sensor is individually programmable for pickup

and dropout voltage setpoints (i.e. adjustable hysteresis) in addition to transient time delay

settings. The TSC 800 controller also provides under and over frequency sensing on both

utility and generator supplies. Each sensor is individually programmable for pickup and

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TSC 800 TRANSFER SWITCH CONTROLLER

dropout frequency setpoints (i.e. adjustable hysteresis) in addition to transient time delay

settings. To program the frequency sensing features, refer to the following descriptions:

To program the voltage and frequency sensing features, refer to the following descriptions:

7.4.1. UTILITY UNDER VOLTAGE SENSOR PICKUP

Set to the desired utility under voltage setpoint at which the internal voltage sensor

picks up (i.e. the sensor energizes to a normal state when all phases of the utility

phase voltages are above the setpoint). The setting is entered based on a phase-to-

phase voltage value within a range of 70% to 99% of nominal system voltage. NOTE:

The difference between the pickup and dropout setting is considered the dead band or

hysteresis value.

7.4.2. UTILITY UNDER VOLTAGE SENSOR DROPOUT

Set to the desired utility under voltage setpoint at which the internal voltage sensor

drops out (i.e. the sensor de-energizes to an abnormal state when any one of the utility

phase voltages is below the setpoint). The setting is entered based on a phase-to-

phase voltage value within a range of 70% to 99% of nominal system voltage. NOTE:

The difference between the pickup and dropout setting is considered the dead band or

hysteresis value.

7.4.3. UTILITY UNDER VOLTAGE SENSOR TIME DELAY (DROPOUT)

Select the desired utility under voltage time delay setting. The setting is entered in

seconds within a range of 0 to 10 seconds. If no delay is required, set this time delay

to zero.

Note: The utility Under Voltage time delay function is enabled if utility voltage drops

below the setpoint on one or more phases and the voltage remains between the

setpoint and 50% of nominal voltage. Should the utility voltage drop below 50% of

nominal value on all phases, the programmed time delay will automatically be reduced

to zero seconds. If a time delay feature is required under any condition, the utility

Under Voltage time delay should be set to zero and Generator Start Delay function

should be set to the desired time period.. Refer to section 7.5.2 for further details.

7.4.4. UTILITY OVER VOLTAGE SENSOR PICKUP

Set to the desired utility over voltage setpoint at which the internal voltage sensor picks

up (i.e. the sensor energizes to an abnormal state when any one phase of the utility

voltage is above the setpoint). The setting is entered based on a phase-to-phase

voltage value within a range of 101% to 200% of nominal system voltage. NOTE: The

difference between the pickup and dropout setting is considered the dead band or

hysteresis value.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.4.5. UTILITY OVER VOLTAGE SENSOR DROPOUT

Set to the desired utility over voltage setpoint at which the internal voltage sensor

drops out (i.e. the sensor de-energizes to a normal state when all phases of the utility

voltage are below the setpoint). The setting is entered based on a phase-to-phase

voltage value within a range of 101% to 200% of nominal system voltage. NOTE: The

difference between the pickup and dropout setting is considered the dead band or

hysteresis value.

7.4.6. UTILITY OVER VOLTAGE SENSOR TIME DELAY (PICKUP)

Select the desired utility over voltage time delay setting. The setting is entered in

seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay to

zero.

7.4.7. UTILITY UNDER FREQUENCY SENSOR

Set to the desired utility under frequency setpoint at which the internal frequency

sensor drops out (i.e. the sensor de-energizes to an abnormal state when the utility

frequency is below the setpoint). The setting is entered in a frequency value within a

range of 25.0 to 49.9Hz (for 50 Hz Systems) and 30.0 to 59.9Hz (for 60Hz Systems).

7.4.8. UTILITY UNDER FREQUENCY SENSOR TIME DELAY (DROPOUT)

Select the desired utility under frequency time delay setting. The setting is entered in

seconds within a range of 0 to 10 seconds. If no delay is required, set this feature to

zero.

7.4.9. UTILITY OVER FREQUENCY SENSOR

Set to the desired utility over frequency setpoint at which the internal frequency sensor

picks up (i.e. the sensor energizes to an abnormal state when the utility frequency is

above the setpoint). The setting is entered in a frequency value within a range of 50.1

to 100.0Hz (for 50 Hz Systems) and 60.1 to 120.0Hz (for 60Hz Systems).

7.4.10. UTILITY OVER FREQUENCY SENSOR TIME DELAY (PICKUP)

Select the desired utility over frequency time delay setting. The setting is entered in

seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay to

zero.

7.4.11. GENERATOR UNDER VOLTAGE SENSOR PICKUP

Set to the desired generator under voltage setpoint at which the internal voltage

sensor picks up (i.e. the sensor energizes to a normal state when all phases of the

generator voltage are above the setpoint). The setting is entered based on a phase-

to-phase voltage value within a range of 70% to 99% of nominal system voltage.

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TSC 800 TRANSFER SWITCH CONTROLLER

NOTE: The difference between the pickup and dropout setting is considered the dead

band or hysteresis value.

Note: The generator Under Voltage time delay function is enabled if generator voltage

drops below the setpoint on one or more phases and the voltage remains between the

setpoint and 50% of nominal voltage. Should the generator voltage drop below 50% of

nominal value on all phases, the programmed time delay will automatically be reduced

to zero seconds. This feature reduces total transfer time back to the utility supply

should the generator set shutdown or loose total voltage output for any reason.

7.4.12. GENERATOR UNDER VOLTAGE SENSOR DROPOUT

Set to the desired generator under voltage setpoint at which the internal voltage

sensor drops out (i.e. the sensor de-energizes to an abnormal state when any one

phase of the generator voltage is below the setpoint). The setting is entered based on

a phase-to-phase voltage value within a range of 70% to 99% of nominal system

voltage. NOTE: The difference between the pickup and dropout setting is considered

the dead band or hysteresis value.

7.4.13. GENERATOR UNDER VOLTAGE SENSOR TIME DELAY

(DROPOUT)

Select the desired generator under voltage time delay setting. The setting is entered in

seconds within a range of 0 to 10 seconds. If no delay is required, set this time delay

to zero.

7.4.14. GENERATOR OVER VOLTAGE SENSOR PICKUP

Set to the desired generator over voltage setpoint at which the internal voltage sensor

picks up (i.e. the sensor energizes to an abnormal state when any one phase of the

generator voltage is above the setpoint). The setting is entered based on a phase-to-

phase voltage value within a range of 101% to 200% of nominal system voltage.

NOTE: The difference between the pick up and drop out setting is considered the dead

band or hysteresis value.

7.4.15. GENERATOR OVER VOLTAGE SENSOR DROPOUT

Set to the desired generator over voltage setpoint at which the internal voltage sensor

drops out (i.e. the sensor de-energizes to a normal state when all phases of the

generator voltage are below the setpoint). The setting is entered based on a phase-to-

phase voltage value within a range of 101% to 200% of nominal system voltage.

NOTE: The difference between the pickup and dropout setting is considered the dead

band or hysteresis value.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.4.16. GENERATOR OVER VOLTAGE SENSOR TIME DELAY (PICKUP)

Select the desired generator over voltage time delay setting. The setting is entered in

seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay to

zero.

7.4.17. GENERATOR UNDER FREQUENCY SENSOR

Set to the desired generator under frequency setpoint at which the internal frequency

sensor drops out (i.e. the sensor de-energizes to an abnormal state when the

generator frequency is below the setpoint). The setting is entered in a frequency value

within a range of 25.0 to 49.9Hz (for 50 Hz Systems) and 30.0 to 59.9Hz (for 60Hz

Systems).

7.4.18. GENERATOR UNDER FREQUENCY SENSOR TIME DELAY

(DROPOUT)

Select the desired generator under frequency time delay setting. The setting is

entered in seconds within a range of 0 to 10 seconds. If no delay is required, set this

time delay to zero.

7.4.19. GENERATOR OVER FREQUENCY SENSOR

Set to the desired generator over frequency setpoint at which the internal frequency

sensor picks up (i.e. the sensor energizes to an abnormal state when the generator

frequency is above the setpoint). The setting is entered in a frequency value within a

range of 50.1 to 100.0Hz (for 50 Hz Systems) and 60.1 to 120.0Hz (for 60Hz

Systems).

7.4.20. GENERATOR OVER FREQUENCY SENSOR TIME DELAY (PICKUP)

Select the desired generator over frequency time delay setting. The setting is entered

in seconds within a range of 0 to 5 seconds. If no delay is required, set this time delay

to zero.

7.5. GENERATOR CONTROL LOGIC

The TSC 800 provides control and delay logic specific to the operation of the generator, these

are:

7.5.1. COMMIT TO TRANSFER LOGIC

The TSC 800 transfer switch controller contains a “COMMIT TO TRANSFER” logic

selection feature. This feature is user programmable and allows 2 different functional

settings which are described below:

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TSC 800 TRANSFER SWITCH CONTROLLER

DISABLED: The transfer switch will not commit to transfer after the engine

start delay has expired.“

ENABLED: The transfer switch will commit to transfer after the engine start

delay has expired.“ Selecting the “ENABLED” mode will prevent numerous

engine starting and stopping sequences if the utility supply is continuously

fluctuating beyond the pre-set limits. The feature is automatically cancelled

after 5 minutes should the generator fails to start or can be manually cancelled

by placing the ATS Menu Mode in “OFF” and then back to Auto.

7.5.2. GENERATOR START DELAY

The generator (i.e. engine) start signal will be initiated following expiry of the start

delay timer. Select desired generator start delay time in seconds. The range of

setting is 0 to 60 seconds. If no delay is required, set this time delay to zero. NOTE:

The output relay is normally energized when the utility power is within limits and de-

energizes to start the generator.

7.5.3. GENERATOR WARMUP DELAY

A transfer to the generator supply will be initiated when the voltage and frequency are

within limits and upon expiry of the warm-up delay timer. Select desired generator

warm-up delay time in seconds. The range of settings is 0 to 3000 seconds. If no

delay is required, set this time delay to zero.

7.5.4. GENERATOR COOLDOWN DELAY

The generator (i.e. engine) cooldown period will be initiated once the load has

transferred from the generator supply. The engine start signal will be maintained until

expiry of the cooldown delay timer. Select desired generator cooldown delay time in

minutes. The range of settings is 0.0 to 50.0 minutes. If no delay is required, set this

time delay to zero. Cooldown time is posted in 1-second decrements when active.

7.5.5. PRE-TRANSFER DELAY (LDC)

The pre-transfer delay period will be initiated upon an impending transfer in either

direction from a powered-to-powered source. The pre-transfer output relay will

momentarily energize (as per the pre-transfer time setting) prior to a load transfer and

will stay energized until the post-transfer delay time commences. Select desired pre-

delay time in seconds. The range of settings is 0 to 300 seconds. If no delay is

required, set this time delay to zero.

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7.5.6. POST-TRANSFER DELAY (LDC)

The post-transfer delay period will be initiated expiry of the pre-transfer delay

(overlapping) in either direction. The post-transfer output relays will energize (as per

the post-transfer time setting) after the load transfer and will stay energized until the

post-transfer delay time period expires. Select desired post-delay time in seconds.

The range of settings is 0 to 300 seconds. If no delay is required, set this time delay to

zero.

7.5.7. TRANSFER LOGIC

NOTE: This feature is user selectable in TSC 800 software version 1.3 (or

greater). The TSC 800 transfer controller software contains a user selectable function

for type of transfer logic required for specific applications. This feature will be factory

set for specific type of application and transfer mechanism used and therefore should

not require resetting.

Selectable operating logic is as follows:

MAINTAINED: The TSC 800 transfer output signals will stay in the

‘MAINTAINED” energized state upon a source failure and will only de-energize

when the alternate source becomes available. NOTE: the transfer output

signal will de-energize upon a total loss of source voltage.

DROPOUT: The TSC 800 transfer output signals will “DROPOUT” (or de-

energize) when the connected source goes out of normal voltage or frequency

limits. The transfer output signal will only re-energize when the connected

source returns to normal limits.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.5.8. LOAD ON UTILITY PROGRAMMABLE OUTPUT

NOTE:

The following Programmable output features are provided in

TSC 800 Software version 2.0 (or higher).

The TSC 800 transfer controller output on terminal TB3-2 may be programmed for

different control functions. The powered output is supplied from the Utility supply and

must be used accordingly. The following programmable functions are available:

NOTE: Only one function may be programmed.

LOAD ON UTILITY Output energizes when the utility transfer

power-switching device is closed.

UTILITY NORMAL Output energizes when the utility supply is

energized and is within nominal voltage and

frequency limits.

DELAYED TRANSFER Output will energize “X” seconds following a

Transfer to Utility logic signal. The time period

is programmable 0-30 seconds.

NOTE:

The delayed transfer output time

delay function will be bypassed

should the original connected

source loose voltage.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.5.9. LOAD ON GENERATOR PROGRAMMABLE OUTPUT

NOTE:

The following Programmable output features are provided in

TSC 800 Software version 2.0 (or higher).

The TSC 800 transfer controller output on terminal TB3-7 may be programmed for

different control functions. The powered output is supplied from the Generator supply

and must be used accordingly. The following programmable functions are available:

NOTE: Only one function may be programmed.

LOAD ON GENERATOR Output energizes when the generator transfer

power-switching device is closed.

GENERATOR NORMAL Output energizes when the generator supply is

energized and is within nominal voltage and

frequency limits.

DELAYED TRANSFER Output will energize “X” seconds following a

Transfer to generator logic signal. The time

period is programmable 0-30 seconds.

NOTE:

The delayed transfer output time

delay function will be bypassed

should the original connected

source loose voltage.

7.5.10. MAXIMUM FIND NEUTRAL DELAY

The TSC 800 transfer control logic includes an adjustable time delay feature to

compensate for the maximum time that a transfer switch mechanism takes to operate

when load-sensing voltage is used to detect the neutral position. This time delay is set

to a time value, which is greater than the typical time that the transfer mechanism

typically takes to operate from one supply position to the neutral position. When the

TSC 800 controller is supplied from the factory with a Thomson Technology transfer

mechanism the Maximum Find Neutral Delay will be factory set for correct operation.

NOTE: When the TSC 800 controller is supplied loose without a transfer mechanism,

the Maximum Find Neutral Delay function must be user set for correct operation with

the applicable transfer mechanism. For applications using ICS type transfer switches

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TSC 800 TRANSFER SWITCH CONTROLLER

or electrically held contactors, the Maximum Find Neutral Delay function must be set

for 0.0 seconds for correct operation.

WARNING

For ICS Type transfer switches, the

Maximum Find Neutral Delay setting will

be factory defaulted to 0.0 Seconds and

must not be changed. Changing the

Maximum Find Neutral Delay setting to

another value will cause equipment

malfunction.

7.5.11. NEUTRAL DELAY TIMER (NDT)

This neutral delay timer setting is used for MCS style transfer switch models only. For

ICS type transfer switches, neutral delay is set in Programming Menus “Load on Gen”

and “Load on Utility Programmable Outputs”-DELAYED TRANSFER. Refer to sections

7.5.8 and 7.5.9 for programming information. The neutral delay time period will be

initiated once both of the supply power-switching devices are open during a transfer

sequence. Select desired neutral delay time in seconds. The range of settings is 0 to

60 seconds. If no delay is required, set this time delay to zero.

WARNING

ICS Type transfer switches do not utilize

this Neutral Delay Timer Function. The

NDT setting will be factory defaulted to

0.0 Seconds and must not be changed.

Changing the NDT setting to another

value will cause equipment malfunction.

For changing neutral time settings on

ICS type transfer switches, refer to

section 7.5.8 & section 7.5.9.

NOTES:

1. The NDT time delay period may be reduced if the neutral

delay bypass is enabled. Refer to section 7.5.12 for further

information.

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TSC 800 TRANSFER SWITCH CONTROLLER

2. The neutral delay may be bypassed should the operating

power fail for longer than the timer setting.

7.5.12. NEUTRAL DELAY BYPASS

The TSC 800 transfer switch controller contains a “NEUTRAL DELAY BYPASS” logic,

which allows a shorter neutral delay period during transfer if the load bus voltage falls

to safe levels before the transfer sequence is completed. This feature is user

programmable and allows 2 different functional settings which are described below:

DISABLED: The transfer switch neutral delay period will operate as per the

Neutral Delay Timer setting.

ENABLED: The transfer switch neutral delay period will be bypassed if the

load bus voltage falls to safe levels before the transfer sequence is completed.

7.5.13. MAXIMUM TRANSFER TIME

The TSC 800 transfer control logic includes an adjustable time delay feature to detect

when a transfer switch mechanism fails to operate. This time delay is set to a time

value which is greater than the typical time that the transfer mechanism typically takes

to operate from one supply position to the opposite supply position. This feature is

factory set to match the specific transfer switch mechanism as supplied with the unit.

7.5.14. TRANSFER FAIL

The TSC 800 transfer switch controller contains a “TRANSFER SWITCH FAIL”

detection feature. This feature is user programmable and allows 3 different functional

settings which are described below:

DISABLED: The “TRANSFER SWITCH FAIL” feature is disabled in this mode.

The TSC 800 controller will not verify that the transfer mechanism has operated

correctly.

HALT TRANSFER: The TSC 800 controller will verify that the transfer switch

mechanism has correctly transferred or is in the correct position. If the TSC

800 controller senses an abnormal condition (i.e. load voltage and transfer

switch position contacts are not at the normal levels or states) the controller will

activate an alarm message to the LCD display. Note: “The transferring output

signals from the controller will be de-activated and the engine start contact will

remain in its last state (before the alarm was activated)”. The controller has an

internal 30-second timer to provide an alarm bypass to enable correct operating

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TSC 800 TRANSFER SWITCH CONTROLLER

sequences. To reset the alarm condition, the “lamp test” function must be

activated.

FORCE TRANSFER: The TSC 800 controller will verify that the transfer switch

mechanism has correctly transferred or is in the correct position. If the TSC

800 controller senses an abnormal condition (i.e. fail to transfer when initiated,

load voltage failure due to a tripped transfer power-switching device or transfer

switch limit switch failure) the controller will activate an alarm message to the

LCD display. The transferring output signals from the controller will be enabled

and will force a transfer to the alternate source if available and within nominal

limits. Note: “The transfer switch will remain on the alternate source indefinitely

until the “Transfer Fail” alarm condition is manually reset on the TSC 800

controller”. The controller has an internal 30-second timer to provide an alarm

bypass to enable correct operating sequences. To reset the alarm condition,

the “lamp test” function must be activated.

NOTE: The Thomson Technology factory default setting for the TSC 800 “Transfer

Switch Fail” function is FORCE TRANSFER.

7.5.15. MANUAL UTILITY TRANSFER RETURN

The TSC 800 transfer switch controller contains a “MANUAL UTILITY TRANSFER

RETURN” feature, which allows an operator initiated re-transfer sequence to occur

when utility power has returned following a power failure. This feature is user

programmable and allows 2 different functional settings which are described below:

DISABLED: The transfer switch will automatically re-transfer back to the utility

supply if within nominal pre-programmed limits and following expiry of the Utility

Return Timer.

ENABLED: The transfer switch will remain on the generator supply until

system operators manually initiate the re-transfer sequence. Press Lamp Test

to initiate the transfer sequence. NOTE: The transfer switch will automatically

re-transfer back to the utility supply if the generator supply fails.

7.5.16. UTILITY RETURN DELAY

The utility return delay period will be initiated once the utility supply has returned within

limits following a utility power failure condition. Select desired utility return delay time

in minutes. The range of settings is 0.0 to 50.0 minutes. If no delay is required, set

this time delay to zero. NOTE: The utility return delay will be bypassed should the

generator fail during the time delay period.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.5.17. MAX SYNC TIME

The TSC 800 transfer control logic includes an adjustable time delay for maximum

synchronizing time for Closed Transition type automatic transfer Switches. If the

selected time expires before the transfer switch sources are synchronized, the

Transfer Fail logic will be initiated. Select desired time in minutes. The range of

settings is 1 to 10 minutes (displays in 1 second decrements when timer active). This

feature is only operative when the TSC 800 Closed Transition Input (TB2-12) is

activated.

7.5.18. MAX POWER SWITCHING DEVICE OPEN TIME

The TSC 800 transfer control logic includes an adjustable time delay for maximum

allowable time both source power-switching devices can remain closed (in parallel)

before opening on a Closed Transition type automatic transfer Switch (detects for a

“fail to separate” condition). If the selected time expires before the transfer switch

power-switching device opens (sources being separated from), the Transfer Fail logic

will be initiated. Select desired time in seconds. The range of settings is 1 to 999

seconds. This feature is only active when the TSC 800 Closed Transition Input (TB2-

12) is activated.

7.5.19. PROGRAMMABLE OUTPUT

The TSC 800 transfer controller includes a standard programmable output relay signal.

The output relay energizes when one of the following conditions occurs. NOTE: Only

one function may be programmed.

LOAD ON UTIL Output energizes when the utility transfer

power-switching device is closed and load

voltage is present.

LOAD ON GEN Output energizes when the generator transfer

power-switching device is closed and load

voltage is present.

LOAD SHED Output energizes when generator is on load and

frequency drops below under frequency setpoint

for longer than the time delay setting.

FAIL TO TRANSFER Output relay energizes when the transfer switch

mechanism fails to operate for the given time

delay period. NOTE: This output feature is only

activated when the “TRANSFER SWITCH FAIL”

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TSC 800 TRANSFER SWITCH CONTROLLER

feature is set to either “Halt” or “Force” transfer

settings.

NOTE:

The following Programmable output features are provided in

TSC 800 Software version 2.0 (or higher).

UTIL NORMAL Output relay energizes when the utility supply is

energized and is within programmed voltage,

frequency and phase balance limits on all

phases.

GEN NORMAL Output relay energizes when the generator

supply is energized and is within programmed

voltage, frequency and phase balance limits on

all phases.

ATS NOT IN AUTO Output relay energizes when the TSC 800

operating mode is not in the AUTO operating

mode. This condition will occur when the

external switch (e.g. FTS4) or internal Test

Modes is programmed in any other mode other

than Auto.

2nd ENGINE START Output relay de-energizes when the TSC 800

signal an engine start operation due to a failed

Utility supply or activated Test mode.

UTIL and GEN NORMAL Output relay energizes when the generator

supply and utility supply are both energized and

are within programmed voltage, frequency and

phase balance limits on all phases.

7.6. VOLTAGE SENSING CALIBRATION

The TSC 800 software program provides voltage-sensing calibration for the utility, generator

and load sensors. All voltage-sensing circuits are factory calibrated to specific voltage levels

prior to shipment of the transfer switch. Recalibration in the field is rare and in most cases

only the Span Calibration needs minor adjustment. Zero calibration should only be

undertaken by qualified personnel due to the nature of the requirements to achieve proper

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TSC 800 TRANSFER SWITCH CONTROLLER

zeroing, factory zero calibration should provide accurate readings with no adjustments

required. Zero calibration is only required on first time setup of new software where zero

correction factors are unknown. Using the original correction factors determined at the factory

as noted on the supplied Program Data Sheets can be reapplied as these values are

associated to sensing resistor error factors of the TSC 800 circuit board (not a software

offset).

Should field calibration of any voltage-sensing circuitry be required, the following procedure

may be used.

WARNING

Voltage sensing circuits are capable of lethal voltages while

energized. Standard safety procedures should be followed and

be performed by qualified personnel only. Failure to do so may

cause personnel injury and/or death.

7.6.1. GENERAL

7.6.1.1. To access the TSC 800’s software programming loop for

programming, the program menu must be selected, the Yes prompt entered

and the Read/Write Security Mode password number (or higher) must be

entered.

7.6.1.2. Once the programming loop has been accessed, scroll to the voltage

calibration screens as shown below.



Displays the selected supply’s phase voltages to be calibrated.



Displays the type of calibration function, either ZERO or SPAN.

UTIL AB

127



ZERO



600V







Displays the calibration correction factor number (0-255) used to obtain the

correct voltage reading. NOTE: To correctly calibrate any of the voltage

sensors, the ZERO function must be calibrated before the SPAN function. A

calibration correction factor number of 127 is typical of no correction offset

being applied, decreasing this value will apply a negative offset and

increasing this value will apply a positive offset.

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TSC 800 TRANSFER SWITCH CONTROLLER



Displays the actual voltage measurement, which will be the same value as

shown on the TSC 800 display menus for generator or utility supplies. This

voltage reading may be calibrated higher or lower by changing the correction

factor number and compared to a meter of known calibration to be within

0.5% or better and adjusted to match.

NOTE:

To accurately calibrate the TSC 800’s voltage

sensors, an external test voltage meter is

required, with an accuracy of 0.5% or better.

7.6.2. UTILITY VOLTAGE CALIBRATION

To adjust the utility supply voltage sensors, perform the following procedure:

7.6.2.1. ZERO CALIBRATION

7.6.2.1.1. Energize the generator supply to power up the controller and

de-energize the utility supply.

7.6.2.1.2. Scroll to the desired utility supply voltage phases with the

ZERO function selected. NOTE: The phases being calibrated for zero

must have a true zero reference to ground to allow proper calibration. A

zero voltage reference should be achieved as a result of a near 0 ohms

resistance through the source supply windings through to the neutral

star point connection which in turn is solidly bonded to the building

ground at one point in the system (where both the step down sensing

and power supply transformers are supplied with the transfer switch the

ground reference is provided by the these transformers and no further

actions are required). Where this ground reference path does not exist

a true zero voltage reference may not be achievable (upstream breaker

ahead of the TSC 800 open in respect to the building utility supply

transformer) as this leaves the sensing inputs to the TSC 800 floating.

In cases such as this the TSC 800 sensing inputs for the Utility supply

must temporarily be grounded to provide this true zero reference. It is

imperative, should this work be undertaken, it only is preformed by

qualified personnel and that the shorting leads be removed before re-

energizing the circuit. Failure to do so will result in catastrophic

equipment failure and possible personnel injury and/or death.

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7.6.2.1.3. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

voltage level. Adjust the correction factor number to obtain 0VAC on

the display.

7.6.2.1.4. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

7.6.2.1.5. Repeat the above procedure for Zero Calibration for all

remaining phases of the utility supply as required. Remove any

shorting leads for zeroing purposes before proceeding.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.6.2.2. SPAN CALIBRATION

7.6.2.2.1. Energize the utility supply voltage to the controller at nominal

level. The generator supply may be de-energized.

7.6.2.2.2. In the programming mode, scroll to the desired utility supply

voltage phases with the SPAN function selected (do not adjust the Zero

calibration function with voltage applied as this will result in non-linear

voltage readings).

7.6.2.2.3. Connect an external AC voltmeter of adequate voltage range

and accuracy to the TSC 800 controller terminal associated with the

voltage phases to be calibrated.

WARNING

Voltage sensing circuits are capable of lethal

voltages while energized. Standard safety

procedures should be followed and be performed

by qualified personnel only. Failure to do so may

cause personal injury and/or death.

7.6.2.2.4. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

voltage level on the TSC 800. Adjust the correction factor number to

obtain an identical voltage reading as measured with the external AC

voltmeter. To attain the highest degree of calibration accuracy for the

Span, adjust the correction factor to attain a TSC 800 voltage value of 1

volt above and 1 volt below the actual value, in each case note the

correction factor number required to attain these values, select the

correction number mid point between these two values and apply this

value.

7.6.2.2.5. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.6.2.2.6. Repeat the above procedures for all remaining phases of

the utility supply as required.

NOTE:

Once the span calibration setting has been done,

do not readjust any zero calibration points as this

will cause incorrect voltage readings.

7.6.3. GENERATOR VOLTAGE CALIBRATION

To adjust the generator supply voltage sensors, perform the following procedure:

7.6.3.1. ZERO CALIBRATION

7.6.3.1.1. Energize the utility supply to power up the controller and

de-energize the generator supply.

7.6.3.1.2. Scroll to the desired generator supply voltage phases with

the ZERO function selected. NOTE: The phases being calibrated for

zero must have a true zero reference to ground to allow proper

calibration. A zero voltage reference should be achieved as a result of

a near 0 ohms resistance through the source supply windings through

to the neutral star point connection which in turn is solidly bonded to the

building ground at one point in the system (where both the step down

sensing and power supply transformers are supplied with the transfer

switch the ground reference is provided by the these transformers and

no further actions are required). Where this ground reference path

does not exist a true zero voltage reference may not be achievable

(upstream breaker ahead of the TSC 800 is open with respect to the

generator set alternator windings), as this leaves the sensing inputs to

the TSC 800 floating. Simply closing the local generator breaker will

generally provide the zero voltage reference required. If this is not

possible the TSC 800 sensing inputs for the generator must be

temporarily grounded to provide this true zero reference. It is

imperative, should this work be undertaken, it only is preformed by

qualified personnel and that the shorting leads be removed before re-

energizing the circuit. Failure to do so will result in catastrophic

equipment failure and possible personnel injury and/or death.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.6.3.1.3. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

voltage level. Adjust the correction factor number to obtain 0VAC on

the display.

7.6.3.1.4. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

7.6.3.1.5. Repeat the above procedure for all remaining phases of

the generator supply as required.

7.6.3.2. SPAN CALIBRATION

7.6.3.2.1. Energize the utility supply voltage to the controller at nominal

level. The generator supply may be de-energized.

7.6.3.2.2. In the programming mode, scroll to the desired generator

supply voltage phases with the SPAN function selected.

7.6.3.2.3. Connect an external AC voltmeter of adequate voltage range

and accuracy to the TSC 800 controller terminal associated with the

voltage phases to be calibrated.

WARNING

Voltage sensing circuits are capable of lethal

voltages while energized. Standard safety

procedures should be followed and be performed

by qualified personnel only. Failure to do so may

cause personal injury and/or death.

7.6.3.2.4. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

voltage level on the TSC 800. Adjust the correction factor number to

obtain an identical voltage reading as measured with the external AC

voltmeter. To attain the highest degree of calibration accuracy for the

Span, adjust the correction factor to attain a TSC 800 voltage value of 1

volt above and 1 volt below the actual value, in each case note the

correction factor number required to attain these values, select the

correction number mid point between these two values and apply this

value.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.6.3.2.5. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

7.6.3.2.6. Repeat the above procedures for all remaining phases of the

generator supply as required.

NOTE:

Once the span calibration setting has been done,

do not readjust any zero calibration points as this

will cause incorrect voltage readings.

7.6.4. LOAD VOLTAGE CALIBRATION

To adjust the load voltage sensors, perform the following procedure:

7.6.4.1. ZERO CALIBRATION

7.6.4.1.1. Energize the utility supply but keep the transfer mechanism

in the neutral position (i.e. Load Bus De-energized.)

7.6.4.1.2. Scroll to the desired load supply voltage phases with the

ZERO function selected. NOTE: The phases being calibrated for zero

must have a true zero reference to ground to allow proper calibration. A

zero voltage reference will not likely be available if there are no

connected loads which result of a near 0 ohms resistance through to

ground (where step down sensing transformers are supplied with the

transfer switch the ground reference is provided by the these

transformers and no further actions are required). Where this ground

reference path does not exist a true zero may not be achievable, as the

load sensing inputs to the TSC 800 will be floating. If this ground path

does not exist the TSC 800 sensing inputs for the load bus must be

temporarily grounded to provide this true zero reference. It is

imperative, should this work be undertaken, it is only preformed by

qualified personnel and that the shorting leads be removed before re-

energizing the circuit. Failure to do so will result in catastrophic

equipment failure and possible personnel injury and/or death.

7.6.4.1.3. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

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TSC 800 TRANSFER SWITCH CONTROLLER

voltage level. Adjust the correction factor number to obtain 0VAC on

the display.

7.6.4.1.4. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

7.6.4.1.5. Repeat the above procedure for all remaining phases of the

generator supply as required.

7.6.4.2. SPAN CALIBRATION SPAN CALIBRATION

7.6.4.2.1. Energize the utility supply voltage to the controller at nominal

level. The generator supply may be de-energized.

7.6.4.2.2. In the programming mode, scroll to the desired generator

supply voltage phases with the SPAN function selected.

7.6.4.2.3. Connect an external AC voltmeter of adequate voltage range

and accuracy to the TSC 800 controller terminal associated with the

voltage phases to be calibrated.

WARNING

Voltage sensing circuits are capable of lethal

voltages while energized. Standard safety

procedures should be followed and be performed

by qualified personnel only. Failure to do so may

cause personal injury and/or death.

7.6.4.2.4. Use the INCREMENT or DECREMENT pushbuttons to

adjust the correction factor number while observing the displayed

voltage level on the TSC 800. Adjust the correction factor number to

obtain an identical voltage reading as measured with the external AC

voltmeter. To attain the highest degree of calibration accuracy for the

Span, adjust the correction factor to attain a TSC 800 voltage value of 1

volt above and 1 volt below the actual value, in each case note the

correction factor number required to attain these values, select the

correction number mid point between these two values and apply this

value.

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TSC 800 TRANSFER SWITCH CONTROLLER

7.6.4.2.5. With the correct voltage displayed, press the ENTER

pushbutton to accept the correction factor number. Record the

correction factor number on the TSC 800 programming sheet for future

reference if required.

7.6.4.2.6. Repeat the above procedures for all remaining phases of

the generator supply as required.

7.6.4.2.7.

NOTE:

Once the span calibration setting has been done,

do not readjust any zero calibration points as this

will cause incorrect voltage readings.

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TSC 800 TRANSFER SWITCH CONTROLLER

8. TSC 800 PROGRAMMING DATA SHEETS

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TSC 800 TRANSFER SWITCH CONTROLLER

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TSC 800 TRANSFER SWITCH CONTROLLER

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TSC 800 TRANSFER SWITCH CONTROLLER

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TSC 800 TRANSFER SWITCH CONTROLLER

9. TSC 800 TYPICAL CONNECTION DIAGRAM

CO NNE C TIO N D IAG R AM

ENG INE S TAR T

EXT ERNA L

4 PO SITI ON

TES T SW ITC H

(OP TION AL)

TR ANSIT ION

UTI LITY SUPP LY SE NSIN G

120 -600 VAC

50/ 60Hz

3 PH ASE

1

GE NERA TOR SUPP LY

SEN SING

120 -600 VAC

50/ 60Hz

3 PH ASE

1

TES T

SER VICE

ENT RAN CE

OFF

CLO SED

AU TOM ATIC T R AN S FER CO N TR OLL ER

MO DEL T SC 80 0

2 x 1 6 CH ARAC TER

DIS PLAY

EXIT DECR EME NT IN CREM ENT ENTE R

TB2 -17

TB2 -16

TB2 -15

TB2 -14

TB2 -13

TB2 -12

A

B

C

A

B

C

A

TB1 -1

TB1 -2

TB1 -3

TB1 -4

TB1 -5

TB1 -6

TB1 -7

LAM P
TES T

V

REF

TB3 -11

TB3 -10

NO T E:

3 P HASE STAN DARD AT S CO NNE CT IONS
SH O W N ON LY.

SEE MAN UAL FOR ALTE RNAT E CO NNEC TION DIA GRAM S

TB3 -5

TB3 -1

TB3 -4

TB3 -6

TB3 -2

TB3 -3

TB3 -9

TB3 -8

TB3 -7

TB2 -3

TB2 -2

TB2 -1

N

L

LO AD ON UT ILITY SUPP LY

L

GEN ERA TOR CONT ROL POW ER

115 or 2 30VA C

LO AD ON GEN ERA TOR SUPP LY

TR ANSF ER T O GE NERA TOR

RAT ED 1 0A, 2 50VA C RES . MA X.

PRE -TRA NSFE R T O GE NERA TOR

RAT ED 3 A, 25 0VAC RES. MAX.

GEN ERA TOR NORM AL
PRO GRA MMAB LE O UTP UT

RAT ED 3 A, 25 0VAC RES. MAX.

ENG INE
ST ART
CON TAC T

RAT ED 10 A, 25 0VAC RES. MAX.

UT ILITY CON TRO L PO WER

115 or 2 30VA C

TR ANSF ER T O UT ILITY

RAT ED 1 0A, 2 50VA C RES . MAX .

PRE -TRA NSFE R T O UT ILITY

RAT ED 3 A, 25 0VAC RES. MAX.

UT ILITY NOR MAL
PRO GRA MMAB LE O UTP UT

RAT ED 3 A, 25 0VAC RES. MAX.

2

2

LOA D SE NSIN G

120 -600 VAC

50/6 0Hz

1 o r 3 PH ASE

SYS TEM GRO UND

DIM ENSIONS

FAC EPL ATE : 5.5 " x 5.5" [1 40mm x 1 40m m ]

PR IN TE D CI RC UI T BO AR D: 6. 30 "W x 1 2.0 0" H [16 0mm W x 30 5mm H]

FU LL FI LENA ME

B

C

GR D

DR AW ING 1

TB1 -8

TB1 -9

TB2 -18

TB2 -4

TB2 -5

TB2 -6

PRO GRA MMAB LE
OUT PUT

RAT ED 10 A, 25 0VAC RES. MAX.

UTI LITY AND GENE RATO R SU PPLI ES M UST

1

UTI LIZE A SO LIDLY GRO UND ED N EUTR AL
SYS TEM. REF ER TO INS TRUC TION MAN UAL FOR
ALT ERNA TE C ONN ECTI ONS

CO NTRO L PO WE R INP UT V OLTA GE M UST

2

MAT CH T SC 8 00 M ODEL TYP E

NOTE : Prog ramm able
outp ut not avail able
for c ustom er use on
Insu lated C ase AT S

REV ISED

04 -12 -1 5 1 1: 00 AM

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TSC 800 TRANSFER SWITCH CONTROLLER

10. TSC 800 SPECIFICATIONS

• POWER SUPPLY:

- 115 or 230VAC nominal (+10% -30%)

- 50/60Hz

- 100ma nominal (no external load connected)

• SOURCE VOLTAGE SENSING:

- Direct 120-600VAC nominal, single or three phase

- 50/60Hz

- +/- 0.5% accuracy of setting @ 25°C

• OPERATING TEMPERATURE:

- 15°C to +50°C

• OUTPUT CONTACTS (Form C, 10A,120/250VAC resistive)

- Engine start

- Programmable function (not available with dual source
system logic or insulated case transfer switches)

• OUTPUT SIGNALS (120/250VAC resistive load)

- Transfer to utility 10A

- Transfer to generator 10A

- Pre/post-transfer to utility 3A

- Pre/post-transfer to generator 3A

- Load on utility 3A

- Load on generator 3A

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TSC 800 TRANSFER SWITCH CONTROLLER

11. TROUBLESHOOTING

A number of problems can cause the TSC 800 controller not to function properly. Refer to the
following list of typical problems. Consult the factory for any detailed information or for any problems
not listed.

CAUTION!!!
Before opening the enclosure to perform any service task, it is imperative to isolate the
transfer switch from any possible source of power. Failure to do so may result in serious
personal injury or death due to electrical shock.

Service procedures must be undertaken by qualified personnel only!

Symptom Possible Causes

*

Will not re-transfer to utility source
upon restoration

- Utility voltage or frequency is outside the pre-programmed

- A loose control connection

- Faulty contactor auxiliary contact

- Defective utility contactor coil

- Defective TSC 800 controller (verify output signals with

- TSC 800 has “Transfer Fail” alarm activated (if programmed

- Bad limit or auxiliary switch N/C contact or loose wire

- TSC 800 programmed for manual retransfer. Press Lamp

- A phase unbalance condition was detected on the Utility

-

Will not transfer to generator
source upon failure of utility
source

- Warm up time delay function has not timed out yet (verify

- A loose control wire connection

- Faulty contactor auxiliary contact

- Defective generator contactor coil

- Defective TSC 800 controller (verify output signals with

- TSC 800 has “Transfer Fail” alarm activated (if programmed

- Bad limit or auxiliary switch N/C contact or loose wire

- A test mode has been activated (check TSC 800 status LCD
display)

limits (check utility source for adequate voltage & frequency)

circuit board mounted diagnostic LED’s)

as “Force Transfer). Determine cause of alarm and rectify
before TSC 800 is reset

termination between the controller and the limit switch

test to initiate retransfer to Utility Source.

supply while on load. The condition may not be readily
noticeable with no load on the source. Confirm voltage
unbalance condition by viewing alarm state on TSC 800
LCD. In this state the load is locked to the generator until
the TSC 800 is reset.

- Generator set not producing enough voltage/frequency or
local generator output circuit breaker open (outside
programmed limits of TSC 800)

TSC 800 timer setting, 0 -3000 seconds programmable)

circuit board mounted diagnostic LED’s) and AC voltage at
appropriate TSC 800 controller terminal

as “Force Transfer). Determine cause of alarm and rectify
before TSC 800 is reset

termination between the controller and the limit switch

- A phase unbalance condition was detected on the
Generator supply prior to or while on load. The condition
may not be readily noticeable with no load on the source. .

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TSC 800 TRANSFER SWITCH CONTROLLER

Symptom Possible Causes

Will not transfer to generator
source upon failure of utility
source (cont’d)

-

Transfer to generator source
without a power failure in the utility
source

- Defective TSC 800 controller (verify output signals with

- Loose or broken wire to the utility voltage sensing terminals

- Failed voltage sensing circuit on TSC 800, repair or replace

- Incorrect voltage calibration providing incorrect readings for

- A transfer fail condition on the Utility PSD or limit switch has

- A phase unbalance condition was detected on the Utility

*

Generator does not start up or stop
when it should

- Verify remote engine start interconnect wiring properly

- Engine Start relay on TSC 800 has failed or been damaged

- TSC 800 non-functional. Confirm the Watch Dog LED on

*

No time delay when there should
be

-

Power is not available at the ATS
load terminals but the utility or
generator power switching device
appears to be closed to a live
source

*

TSC 800 Display is Blank

- There is no power to the controller. Confirm power to the

Confirm voltage unbalance condition by viewing alarm state
on TSC 800 LCD. In this state the load is locked to the
utility source until the TSC 800 is reset

- Transfer switch motor brake assembly will not release.
Possible interference with field installed wiring. Only
possible on 100 through 250 Amp ATS’s with exposed
mechanical brake.

- A test mode has been activated (check TSC 800 status LCD
display, can be via internal or external test inputs)

circuit board mounted diagnostic LED’s)

on the TSC 800 controller

controller.

- Utility supply voltage is slightly above or below voltage
sensing set points. Compare TSC 800 program voltage set
points with actual utility voltage displayed on the controller

Utility Sensing and being interpreted as being out of limit.

occurred, review LCD for alarm condition, press lamp test to
reset.

supply while on load. The condition may not be readily
noticeable with no load on the source. Confirm voltage
unbalance condition by viewing alarm state on TSC 800
LCD. Press lamp test to reset.

- Verify remote engine control panel is set for automatic mode
and no shutdown faults present.

terminated (not open circuit).

due to excessive current.

rear of circuit board to be flashing (processor healthy) and
the Engine Start LED is on confirming the start request.

- Verify time delay function in the TSC 800 program setting as
per programming sheets as supplied with the transfer switch

- The power switching device's trip unit (service entrance style
only) has tripped on a fault on the system and TSC 800
“Transfer Fail” is programmed as “Disabled or Halt
Transfer”. Correct the fault, and manually reset the power­switching device in the transfer switch by moving it off and
then on again with the manual operating handle.

- Display in Sleep Mode. Press any keypad to re-energize the
display.

controller from available supplies. Possible external
controller Power Transformer failed (PT1 & 2 )or controller

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TSC 800 TRANSFER SWITCH CONTROLLER

phases drops below 20% of nominal system voltage).

Symptom Possible Causes

TSC 800 Display is Blank (cont’d)

- Isolation Plug is pulled. Confirm correct voltage

- Utility power is failed and generator running but its local

*

Transfer Switch Cycles between
sources

- TSC 800 generator under voltage and/or under frequency

*

Transfer Switch controller
indicates the mechanism has made
position but does not conduct to
the load bus and the PSD is not
tripped

*

Less than programmed Neutral
Delay Time (NDT) or none at all
administered during transfer
between powered sources.

- Transfer Switch incorporates a Bypass configuration

- High residual voltage from the connected loads (neutral

*

Engine runs for no apparent reason

mounted transformer or internal power supply failed (one or
both sources).

configuration and/or levels prior to installing the Isolation
Plug.

breaker is open.

- Limit Switch is not being fully actuated to break the motor
circuit during transfer. Limit switch adjustment incorrect
(Limit Switch Struck Late or not at all on 100A-1200A
molded case switch style ATS).

time delays set to short. Time delays are exceeded on load
application causing recycling to Utility supply (happens only
during an on load test and utility available).

- Limit switch adjusted to close to yoke arm causing the ATS
mechanism to stop before PSD closes (Limit Switch Struck
Early on 100A-1200A molded case switch style ATS).

- Neutral Delay Bypass feature enabled. Effectively cancels
NDT if not required (canceled if load bus voltage for all

Normal Operation.

(currently is bypassing the ATS mechanism) and the test
cable connected. No neutral positioning will be detected
and no NDT applied as a result (normal condition).

position can not be determined). Contact Thomson
Technology for possible corrective solutions.

- Verify the TSC 800 has not been set for a manual or auto off
load test operation. If yes, select “Auto” (“None” in firmware
versions 1.7 and earlier).

- Verify the TSC 800 engine start LED is lit on the rear of the

- Local Generator Engine controller has built in cool down

- Local generator controls are in Manual Run.

*

Oscillating/unstable voltage
readings displayed for one or more
sources when measured voltage
with an independent meter
confirms stable voltage

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controller. If not lit isolate one of the remote start wires to
confirm the start is from the TSC 800 (contact closes to
start, open wire should cause generator to stop). Engine
start relay coil on TSC 800 failed (drops to issue start,
energized to inhibit start).

function or test features separate from the TSC 800.

- System neutral conductor has not been solidly bonded to
ground for one or more of the sources or a 3-phase 3-wire
system has been applied to an ATS designed for a 3-phase
4-wire configuration. Isolation transformers will need to be
added to create the ground reference to correct the
problem. Contact Thomson Technology for corrective
solutions.

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TSC 800 TRANSFER SWITCH CONTROLLER

Symptom Possible Causes

Oscillating/unstable voltage
readings displayed for one or more
sources when measured voltage
with an independent meter
confirms stable voltage (cont’d)

*

TSC 800 Displays voltage values
well in excess of actual

TSC 800 Transfer Fail Displayed

- Defective TSC 800 controller. Contact Thomson Technology
for replacement.

-

The wrong voltage sensing ratio has been programmed

- Secondary power transformers used for sensing are
installed improperly. Polarities of PT’s were not observed
during installation/replacement. Contact the factory for
assistance.

- Defective TSC 800 controller. Contact Thomson Technology
for replacement.

Limit switch or auxiliary contact not closed to signal TSC
800 of ATS in correct position

Load bus voltage not sensed at the TSC 800 controller to
confirm load bus is energised

“Max Transfer Fail Time” or “Max Find Neutral Time” or set
too low

- Max Transfer Fail Time: Set for 15 seconds or greater on
MCS style ATS, or 3 seconds on ICS style ATS

- Max Find Neutral Time: Set for 6.0 seconds for MCS style
ATS or 0.0 seconds for ICS style ATS.

On ICS style ATS both NDT & Delayed Transfer Output
Timers have time applied.

-NDT: set to 0 seconds

- Delayed Transfer Output: set to required neutral delay time

On ICS style ATS both NDT & Delayed Transfer Outputs
timers set to 0 seconds.

- Delayed Transfer Output: must be set for minimum of 0.2
seconds

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12. REPLACEMENT PARTS

Replacement parts are available for the TSC 800 controller as follows:

TSC 800 Controller Board P/N 002661

TSC 800 115V Selector Plug P/N 002633 (2 required)

TSC 800 230V Selector Plug P/N 002634 (2 required)

TSC 800 Lexan Faceplate P/N 001599 (Standard 5.5”X5.5” Lexan)

TSC 800 Rear Cover P/N 001073

TSC 800 LCD P/N 000559

TSC 800 LCD connector P/N 000264

TSC 800 LCD Gasket P/N 001074

When ordering replacement parts please provide the following information:

1. Transfer Switch Model code (e.g. TS 873AA0200AS)

2. Transfer Switch Serial Number (e.g. W-022345)

The above information can be found on the transfer switch rating plate located on the outside of the

ATS door.

For other parts not listed, please contact Thomson Technology.

NOTE

There are no user serviceable/replaceable components located

on the TSC 800 printed circuit board. If the TSC 800 controller

is deemed to be defective it must be returned to the Thomson

Technology Factory for repair or replacement. Please refer to

Section 13 for further detailed on product return procedures

required.

13. PRODUCT RETURN POLICY

Thomson Technology uses a Return Material Authorization (RMA) process. Please complete the

Return Authorization Request Form (available on our web page) for return of goods, warranty

replacement/repair of defective parts, or credit consideration and fax to the appropriate department.

Returns only: Sales Fax [phone]

Warranty replacement/Warranty Repair: Service Fax [phone].

Upon receipt of your request, Thomson Technology will confirm with a copy of our Order

Acknowledgement via fax advising the RMA number which should be used to tag the defective

controller prior to shipment.

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14. NOTES

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