Cooper Lighting S260-75-1 User Manual

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Page 1

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . .2

Hazard Statement Definitions . . . . . . . . . . . . . . . .2

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . .2

Product Information . . . . . . . . . . . . . . . . . . . . . . .3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Acceptance and Initial Inspection . . . . . . . . . . . . .3

Handling and Storage . . . . . . . . . . . . . . . . . . . . . .3

ANSI Standards . . . . . . . . . . . . . . . . . . . . . . . . . .3

Quality Standards . . . . . . . . . . . . . . . . . . . . . . . . .3

Description of Operation . . . . . . . . . . . . . . . . . . . .4

Time Delay Selection . . . . . . . . . . . . . . . . . . . . . .4

Pre-Installation Check . . . . . . . . . . . . . . . . . . . . . .5

Pre-lnstallation . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Installation Instructions . . . . . . . . . . . . . . . . . . . .6

Initial Programming . . . . . . . . . . . . . . . . . . . . . . .6

Mounting the Control . . . . . . . . . . . . . . . . . . . . . .6

Grounding the Control . . . . . . . . . . . . . . . . . . . . .6

Before Placing the Control and Switchgear

in Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Equipment Required . . . . . . . . . . . . . . . . . . . . . . .6

Customer Connections . . . . . . . . . . . . . . . . . . . . .8

Interconnecting Cables . . . . . . . . . . . . . . . . . . . . .13

Operating Instructions . . . . . . . . . . . . . . . . . . . . .16

Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . .16

Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . .17

Theory of Operation—Basic S Control . . . . . . . . .17

Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . .17

Automatic Transfer, Preferred to Alternate . . . . . .18

Return Transfer, Parallel Transition . . . . . . . . . . . .18

Return Transfer, Non-Parallel Transition . . . . . . . .18

No Preference Mode . . . . . . . . . . . . . . . . . . . . . .19

Preferred Source II Mode . . . . . . . . . . . . . . . . . . .19

Control Mode Switch, S5 . . . . . . . . . . . . . . . . . . .19

Manual Control . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Indicating Lamps . . . . . . . . . . . . . . . . . . . . . . . . .19

Remove the Control from Service . . . . . . . . . . . . .20

Troubleshooting—Basic S Control . . . . . . . . . . . .20

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . .20

Advanced Troubleshooting . . . . . . . . . . . . . . . . . .21

Fault Block Accessory . . . . . . . . . . . . . . . . . . . . .28

General Description . . . . . . . . . . . . . . . . . . . . . . .28

Accessory Settings . . . . . . . . . . . . . . . . . . . . . . . .28

Operating Instructions . . . . . . . . . . . . . . . . . . . . .29

Theory of Operation—Fault Block Accessory . . . .29

Overcurrent Sensing . . . . . . . . . . . . . . . . . . . . . .29

Phase Fault Operation . . . . . . . . . . . . . . . . . . . . .29

Ground Fault Operation . . . . . . . . . . . . . . . . . . . .32

Reset Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Inrush Restraint Feature . . . . . . . . . . . . . . . . . . . .32

Testing Fault Block Operation . . . . . . . . . . . . . . . .33

Returning the Control to Service . . . . . . . . . . . . . .35

Wiring Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . .40

Front Panel—Replacement Parts List . . . . . . . . . .41

Back Panel—Replacement Parts List . . . . . . . . . .42

Fault Block Accessory—Replacement Parts List . .43

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Oil- and Vacuum-Break Switches

Service Information

Contents

S260-75-1

Printed in USA

October 2002 • Supersedes 1/90

Figure 1. Kyle®Type S automatic load-transfer control.

020076KM

Page 2

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

The instructions in this manual are not intended as a substitute for proper training or adequate experience in the safe operation of the equipment described. Only competent technicians who are familiar with this equipment should install, operate, and service it.

A competent technician has these qualifications:

• Is thoroughly familiar with these instructions.

• Is trained in industry-accepted high- and low-voltage safe operating practices and procedures.

• Is trained and authorized to energize, de-energize, clear, and ground power distribution equipment.

• Is trained in the care and use of protective equipment such as flash clothing, safety glasses, face shield, hard hat, rubber gloves, hotstick, etc.

Following is important safety information. For safe installation and operation of this equipment, be sure to read and understand all cautions and warnings.

Safety Instructions

Following are general caution and warning statements that apply to this equipment. Additional statements, related to specific tasks and procedures, are located throughout the manual.

SAFETY INFORMATION

WARNING: This equipment is not intended to

protect human life. Follow all locally approved procedures and safety practices when installing or operating this equipment. Failure to comply can result in death, severe personal injury, and equipment damage.

G102.1

DANGER: Hazardous voltage. Contact with

hazardous voltage will cause death or severe personal injury. Follow all locally approved safety procedures when working around high and low voltage lines and equipment. G103.3

WARNING: Before installing, operating, main-

taining, or testing this equipment, carefully read and understand the contents of this manual. Improper operation, handling or maintenance can result in death, severe personal injury, and equipment damage. G101.0

WARNING: Power distribution equipment must

be properly selected for the intended application. It must be installed and serviced by competent personnel who have been trained and understand proper safety procedures. These instructions are written for such personnel and are not a substitute for adequate training and experience in safety procedures. Failure to properly select, install, or maintain power distribution equipment can result in death, severe personal injury, and equipment damage.

G122.2

SAFETY FOR LIFE

Cooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We actively promote safe practices in the use and maintenance of our products through our service literature, instructional training programs, and the continuous efforts of all Cooper Power Systems employees involved in product design, manufacture, marketing, and service.

We strongly urge that you always follow all locally approved safety procedures and safety instructions when working around high voltage lines and equipment and support our “Safety For Life” mission.

This manual may contain four types of hazard statements:

DANGER: Indicates an imminently hazardous situation which, if not avoided, will

result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in

death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in

minor or moderate injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in equipment damage only.

Hazard Statement Definitions

SAFETY

FOR LIFE

SAFETY

FOR LIFE

Page 3

Introduction

Service Information S260-75-1 provides installation, operation, and maintenance instructions for the Kyle

Type S automatic load-transfer control.

Read This Manual First

Read and understand the contents of this manual and follow all locally approved procedures and safety practices before installing or operating this equipment.

Additional Information

These instructions cannot cover all details or variations in the equipment, procedures, or process described, nor to provide directions for meeting every possible contingency during installation, operation, or maintenance. For additional information, contact your Cooper Power Systems representative.

Acceptance and Initial Inspection

Each Type S control is completely assembled, tested, and inspected at the factory. It is carefully calibrated, adjusted, and in good condition when accepted by the carrier for shipment.

Upon receipt, inspect the carton for signs of damage. Unpack the control and inspect it thoroughly for damage incurred during shipment. If damage is discovered, file a claim with the carrier immediately.

Handling and Storage

Use care during handling and storage of the control. If the control is to be stored for any length of time prior to installation, provide a clean, dry storage area to minimize the possibility of mechanical damage.

ANSI Standards

Kyle reclosers are designed and tested in accordance with ANSI standards C37.60 and C37.85 and ANSI guideline C37.61.

Quality Standards

The Quality System at the Cooper Power Systems, Kyle Distribution Switchgear plant is

ISO 9001 certified.

ISO 9001 CAN/CSA ISO 9001 BS EN ISO 9001 ANSI/ASQC Q9001

S260-75-1

PRODUCT INFORMATION

SAFETY

FOR LIFE

Page 4

Description of Operation

The Type S control is designed for use primarily with Kyle Type VR, VLR, VR V, TSC, and C three-phase, load-break switches in automatic load-transfer schemes. In a typical scheme, service to a critical load is normally supplied from a preferred source. It is automatically switched to an alternate, standby source if the preferred source voltage is lost for any reason for a preset period of time. Upon restoration of the preferred source voltage, the load is automatically switched back to the preferred source, again after a predetermined time delay.

Typical Automatic Load-transfer Sequence using the Type S Control

• The load is transferred to the alternate source after a preset time delay, when the preferred source voltage is lost and normal voltage is present on the alternate source. Either Source I or Source II can be selected as the preferred source by a setting on the SOURCE PREFERENCE Switch, S4.

• The load is transferred back to the preferred source— after another preset time delay—when normal voltage is restored to the preferred source. The return transfer (from Source II to Source I) can be either non-parallel (alternate-source switch opens before preferred-source switch closes) or parallel (preferredsource switch closes before alternate-source switch opens). With parallel return the second interruption is eliminated; however, both sources must be in synchronism. The return transfer mode is selected by a setting on the SOURCE PREFERENCE switch, S4.

Variations in the Operation of the Type S Control

•No-Preference Operation. When either source is acceptable for continuous critical load supply. Upon loss of Source I voltage—and after a preset time delay—the load is automatically transferred to Source II, provided normal voltage is present on Source II. However, the load is not transferred back to Source I when voltage is restored, but remains on Source II until such time as Source II voltage is lost. Then an automatic nonparallel transfer to Source I is performed. (Accomplished by setting SOURCE PREFERENCE switch, S4, to NO PREF position.)

•Hold on Alternate Source. When placed to the HOLD ON ALTERNA TE position, the S control will not automatically return to the preferred feeder. If the preferred feeder is energized, the S control can be manually transferred to the preferred feeder by momentarily moving S3 to the NORMAL position.

•Manual Operation of the S control. The Source I and Source II high-voltage switches can be opened and closed independently to effect manual transfer from one source to the other. (Accomplished by setting OPERA TION SELECT OR switch, S3, to MANUALand operating MANUAL OPER. SOURCE I (S1) and MANUAL OPER. SOURCE II (S2) switches as required.)

In addition, a factory-installed fault block accessory will Block Transfer if loss of voltage is due to a fault on the load side of the high-voltage switches. When preferred source voltage is lost (due to the opening of the backup protective device)—and after the preset time delay—the preferred source switch will open and the fault block accessory will disable the S control to prevent closing either high-voltage switch into the fault. The S control must be manually reset before service to the load can be restored. The fault block option is a factory-installed accessory. The accessory is activated by over-current signals supplied by load-sensing current transformers built into special factory-modified Type VR, VLR, VRV, TSC, and CS high-voltage switches. It is also compatible with the PST-6 switchgear. The PST-9 switchgear does not require fault block.

Time Delay Selection

The time delay setting for preferred to alternate source transfer must be long enough to allow discrimination between permanent loss of voltage and temporary loss of voltage due to transient effects or reclosing intervals of backup protective reclosers or breakers. The time-delay required to override reclosing intervals is difficult to determine since voltage may be subnormal during the retarded timing operations of the backup device due to the presence of the fault. It is recommended that the time delay before transfer from preferred to alternate source is set to exceed the maximum cumulative time to lockout of the backup protective device. This approach assures that the transfer switch will not interrupt the current of a fault occurring on the load side of the switch.

The time delay for return from alternate to preferred source upon restoration of preferred source voltage should be set for an interval long enough to assure that service on the preferred source has been permanently restored.

When the control is programmed to operate in the “nopreference” mode, there are no preferred or alternate sources. Time delay intervals for transfer from Source I to Source II are governed by the left-hand Preferred to Alternate timer and for transfer from Source II to Source I by the right-hand Alternate to Preferred Timer. Settings of the two timers may be different because of difference in backup protection on the two sources.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

IMPORTANT: If Control Mode Switch S3 is placed in

the “AUTO” position, the S-control will place the highvoltage transfer switches into the configuration that is currently selected by the Source Preference Switch S4. This may result in an unintended transfer. Make sure the desired state of the high-voltage transfer switches match the setting of S4 before returning S3 to the “AUTO” position.

Page 5

Pre-Installation

The Type S automatic load-transfer control is programmed to customer’s specifications and thoroughly tested before shipment from the factory. Perform the following pre-installation test setup and procedure to verify the operation of the standard S control.

Note: This procedure does not test complete control opera-

tion. This can be done only on a complete installation basis with the S control operating the high-voltage transfer switches.

Test Set–up

1. Connect a 120 Vac, 60 Hz power supply to terminals Z and G2 of TB2 being absolutely certain that the grounded side of the power supply is connected to G2.

2. Jumper terminal Z to Y to X to C to B to A.

3. When the 120 Vac power supply is turned on, all six

phases are energized.

4. To simulate loss of voltage on any phase of either source, simply unscrew the appropriate fuse “FU” in the control.

Test Procedure

1. Check the indicating lamps by depressing the LAMP TEST switch (S6). All lamps on the front panel of the control (including fault block accessory if installed) should light with equal brilliance.

2. With phase Y and/or phase B energized, terminals 11 and 21 of TB1 will always show 120 Vac to ground (G1or G2).

3. With OPERATIONS SELECTOR switch (S3) set to MANUAL, terminal 13 of TB1 will respond to the operation of MANUAL OPER. SOURCE I switch (S1) showing 120 Vac to ground when S1 is in the open position and 10 Vac, or less, when S1 is in the OFF and CLOSE positions. Terminal 23 of TB1 will show similar voltages to ground in response to the operation of MANUAL OPER.

4. When MANUAL OPER. SOURCE I switch (S1) is in the CLOSE position there should be 120 Vac

between terminal 15 of TB1 and ground. Similarly, when MANUAL OPER. SOURCE II switch (S2) is in the CLOSE position there should be 120 Vac between terminal 25 of TB1 and ground.

5. To check the response of the latching relay to automatic operation, proceed as follows:

A. Set OPERATION SELECT OR switch (S3) to AUTO. B. Select the desired source preference and return

mode with switch S4.

C. After waiting for a time in excess of the maximum

transfer delay timer setting (to make sure the control is at rest), simulate a “lost” phase by unscrewing one of the preferred source fuses. Listen for relay clatter to recognize breaking the circuit.

D. As soon as phase voltage is lost, the PREFERRED

TO ALTERNATE TIMER will start to run. Verify the LED timer is illuminated during operation.

E. When timing is complete, the latching relay (R1)

will operate. Its position can be checked by the presence of 120 V ac at test terminals T-1 or T -2 on the front panel. 120 Vac between T-2 and T-3 (ground) means the latching relay has moved to that position which would connect the load to Source II if HV switches were connected to the control. 120 Vac at T-1 means the load would be connected to Source I.

F. Replace the removed fuse to restore preferred

source power, observe operation of the ALTERNATE TO PREFERRED TIMER, and check the status of the latching relay (R1) when timing is completed.

Note: SOURCE PREFERENCE switch S4 cannot be

in NO PREF position for this test.

G. Other modes of transfer can be checked by pro-

gramming the control for the desired sequence, simulating loss of source voltage, observing resultant control operation, and checking the final position of the latching relay (R1).

6. Timer settings can be verified with a watch while performing the checks in preceding Step 5.

7. Switch I and Switch II position indicating lamps will not operate during this preinstallation check since the high-voltage transfer switches are not connected to the control.

Their operation can be verified by connecting a 100 ohm, 1 watt, resistor from TB1 terminals to ground as follows:

SWITCH I OPEN lamp—terminal 15 to ground SWITCH I CLOSED lamp—terminal 24 to ground SWITCH II OPEN lamp—terminal 25 to ground SWITCH II CLOSED lamp—terminal 14 to ground

S260-75-1

PRE-INSTALLATION CHECK

WARNING: This equipment is not intended to

protect human life. Follow all locally approved procedures and safety practices when installing or operating this equipment. Failure to comply can result in death, several personal injury and equipment damage.

G102.1

WARNING: Hazardous voltage. Never rely on

the open position of the operating handle or the

contact position indicator; it does not ensure that the line is deenergized. Follow all locally approved safety practices. Failure to comply can result in contact with high voltage, which will cause death or severe personal injury. G123.1

SAFETY

FOR LIFE

Page 6

Atypical automatic transfer scheme is illustrated in Figure 2.

Initial Programming

The control must be programmed with all necessary operating settings prior to operation with energized switchgear. For the desired settings refer to the Operating Instructions section in this manual.

Mounting the Control

Mount the S control in a convenient, accessible location. Maximum distances between the high-voltage transfer switches and potential sensing transformers and the control depends upon the size of the control cable wire and the length of various cable combinations. (See the Interconnecting Cables section in this manual.) Keep in mind that the longer the cable lengths, the greater the susceptibility to surge damage. Therefore, for optimum reliability and economy, locate the switches and transformers as near as possible to the control.

Mounting dimensions are provided in Figure 3.

• For pole-mounted installation, a hole and keyway in the control mounting bracket accommodates a 5/8” bolt.

• For substation installation, the control is factory installed. Leveling is not required.

Grounding the Control

The control cabinet must be grounded. Agrounding connector on the underside of the cabinet will accommodate No. 14 solid through No. 4 stranded conductors.

For efffective surge protection all control and power conductors for the S control must be routed parallel to a corresponding ground path. For example, the AC power supply for the control should be parallel to and equal in length to the transformer ground path. The control cable should be parallel to and routed close to the switchgear ground path.

Before Placing the Control and Switchgear into Service

Prior to placing the control and switchgear into service, the following installation procedures must be properly completed and verified:

1. Control properly mounted for the installation.

2. Equipment installed according to all locally approved

standards and practices.

3. Control and switchgear properly grounded in accordance with guidelines in this manual.

4. AC power connected to the control.

5. All control programming entered and verified by

appropriate personnel.

Equipment Required

The following equipment is required for a load-transfer installation:

Type S Load-Transfer Control

The control, with or without the fault block accessory, is housed in a cabinet whose outline and mounting dimensions are shown in Figure 3. The control cabinet can be mounted on a pole or substation structure. Leveling is not required. Both the cabinet door and the hinged front panel are equipped with hold-open latches to prevent them from swinging in the open position.

Motor Operated Switches

The three-phase, load break switches require a special wiring accessory for operation with the Type S control. In addition, if fault block is provided, the switches must be equipped with 1000:1 ratio current transformers also available as a factory-installed switch accessory . See the switch installation manual for overall and mounting dimensions and for wiring diagrams.

Potential Transformers

Three-phase voltage sensing is required for control operation. Transformer connections and voltages for various distribution system connections are shown in Figure 5. The voltage sensing relays of the T ype S control drop out on a decreasing voltage at 75 volts (min) and pick up on an increasing voltage at 97 volts (max). The control requires 120 Vac, 60 Hz, 500 VA (min) to operate the transformer switches. Quiescent power dissipation at 120 Vac is 18 watts.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

INSTALLATION INSTRUCTIONS

WARNING: Hazardous voltage. Solidly ground

all equipment. Failure to comply can result in

death, severe personal injury , and equipment damage.

T223.2

CAUTION: Equipment misoperation. Do not

energize this equipment until all control settings have been properly programmed and verified. Refer to the Control Programming and Operation section of this manual for programming procedures. Failure to comply can result in misoperation (unintended operation), equipment damage, and personal injury. G118.1

Page 7

S260-75-1

Figure 2. Typical Type S control load-transfer scheme.

Figure 3. Outline and mounting dimensions.

Direction of

Transfer

First Switch Transition (Source to

Switch Reaction Time* Time** Source) Type of Transition

VR, VLR, VRV (standard) 2.5 to 3.5 cycles 10 sec (approx) I to II No paralleling of sources VR, VLR, VRV (standard) 2.5 to 3.5 cycles 10 sec (approx) II to I No paralleling of sources VR, VLR, VRV (standard) 10 sec (approx) 1.0 to 1.5 cycles II to I Paralleling of sources on return to preferred source

VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles I to II No paralleling of sources VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles II to I No paralleling of sources VR, VLR, VRV (quick close) 4.0 to 5.5 cycles 1.0 to 1.5 cycles II to I Paralleling of sources on return to preferred source

TSC 7 to 8 sec 7 to 8 sec I to II No paralleling of sources TSC 7 to 8 sec 7 to 8 sec II to I No paralleling of sources TSC 7 to 8 sec 7 to 8 sec II to I Paralleling of sources on return to preferred source

PST-6, PST-9 2.0 to 3.0 cycles 5.0 to 6.0 cycles I to II No paralleling of sources PST-6, PST-9 2.0 to 3.0 cycles 5.0 to 6.0 cycles II to I No paralleling of sources PST-6, PST-9 5.0 to 6.0 cycles 2.0 to 3.0 cycles II to I Paralleling of sources on return to preferred source

TABLE 1 Reaction and Transition Times of Cooper Power Systems Motor-Operated Switches

* Time from expiration of time delay to first opening (or closing) of high-voltage switch. Add approximately one cycle to the

values shown to allow for Type S control relay operating time.

** Time-load tap is disconnected or paralleled depending on type of transition used.

SAFETY

FOR LIFE

LOAD

SOURCE I

POTENTIAL SENSING TRANSFORMERS

H.V. SWITCH I

TYPE S CONTROL

H.V. SWITCH II

12 13/16"

22 5/32"

5/8" HOLE PROVIDED FOR CUSTOMER LOCK

POTENTIAL SENSING TRANSFORMERS

16"

SOURCE II

MTG HOLES (2) FOR 5/8" MAX BOLT DIA

1 1/2"

20 1/8" MTG DIM

17 7/8"

GROUNDING

1 3/16"

11"

13 1/2"

2 1/2" 2 1/2"

STD CONTROL

CONTROL WITH FAULT BLOCK

1 1/2"

2 1/2" 2 1/2"

TERMINAL LUG (14 TO 4 STRANDED)

1 5/8" DIA HOLES

5 1/4"

Page 8

Customer Connections

Connection Diagram

Diagrams for interconnecting the load-transfer control with the high-voltage switches and potential transformers are shown in Figures 5 through 8. The diagrams show

the internal wiring between the terminal blocks and the input and output receptacles on the control (available as an accessory) and the external wiring between the control, transfer switches, and potential transformers. If the control is not equipped with the plugs and receptacles accessory, the cables are wired directly to the terminal blocks in the control. For the physical location of terminal blocks, refer to Figure 27.

Note: Internally wired receptacles and mating plugs for the

switch operators and current sensing transformers on the switch end of the cables are provided as standard with the switches.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 4. Phase voltage at the three-phase sensing Type S load-transfer control.

CAUTION: Equipment Damage. Do not drill connection holes into the top of the cabinet. Connection holes in the top of the cabinet will allow moisture to seep into the control and damage the components or cause control misoperation. Failure to comply will void the control’s factory warranty.

T249.0

LOAD

H.V.

SOURCE

Phase Voltage at the Three-Phase Sensing Type S Load Transfer Control as Related to System and Sensing Transformer Connections

FEEDER

SWITCH

S CONT

H.V. SWITCH

* Assuming no feedback from the load ** Bank operates open wye-delta; requires two primary phases open for sensing † Voltage may vary from 87 to 58% depending on load

Page 9

S260-75-1

Figure 5. Connection diagram for Type S load-transfer control (with fault block accessory) operating a Type VR,VLR, or VRV three-phase switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

SAFETY

FOR LIFE

SOURCE II

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

SOURCE I AND SOURCE II MUST

PRESENT THE SAME PHASE

ROTATION TO THE LOAD.

TYPE VR, VLR, OR VRV

SWITCH WITH KA217VR

WIRING ACCESSORY

LOAD TAP

TYPE VR, VLR, OR VRV

SWITCH WITH KA217VR

WIRING ACCESSORY

2 1

AUX.

SW "a"

CONTACT

(STAGE1)

D C B

ABC

SEE INSERT

RECEPTACLES AND PLUGS

FURNISHED WITH KA217VR

WIRING ACCESSORY

FOR INTERNAL

CONNECTIONS

"SW"

GRN

21 25

2324 26

G2 G1

16 13 14 15 11

S CONTROL

TRANSFER SWITCH OPERATORS

A A

WHT

GRN

A A

B B

"SW"

E D

D C

B A

AUX. SW "a"

CONTACT (STAGE1)

2 1

F E

C B A

H G F E

ABC

SEE INSERT FOR

INTERNAL

CONNECTIONS

C C

RED

WHT

B B

D D

BLK

BLK C C

E E

BLU

ORG

F F

BLU

F F

SELECTOR

SWITCH

MOTOR

TRIP OPEN COIL

FACTORY-WIRED RECEPTACLE

AND PLUG ACCESSORY KCN55SB

(IF ACCESSORY IS NOT SPECIFIED

WIRE SWITCH CONTROL DIRECTLY

TO TB1, PT'S TO TB2 AND CT'S TO TB5.)

"CT"

BLK

RED

GRN

IZ 27 IY IX

IN IN

IB IA

FAULT BLOCK ACCESSORY

BLK

RED

GRN

C C

D D

YEL

D D

E E

BLU

ORG

BLU

ORG

E E

POTENTIAL SENSING

"CT"

"PT" J J

TRANSFORMERS

K K

Z Y X

G C B A

WHT

GRN

A A

B B

BLK

RED

BLK

RED

B B

C C

WHT

K K

J J

"PT"

QUICK

COIL

MOTOR

SELECTOR SWITCH

NOTE: FOR SINGLE-PHASE SENSING

JUMPER TERMINAL A TO B TO C AND

TERMINAL X TO Y TO Z ON TB2

F E

3 2

INTERNAL CONNECTION DIAGRAM:

STANDARD SWITCH OPERATOR

F E

3 2

C B

1 0

TRIP

OPEN

COIL

SOURCE I

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

INTERNAL CONNECTION DIAGRAM:

QUICK CLOSE SWITCH OPERATOR

Page 10

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 6. Connection diagram for Type S load-transfer control (with fault block accessory) operating the Type TSC three-phase switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

SOURCE I AND SOURCE II MUST

PRESENT THE SAME PHASE

ROTATION TO THE LOAD.

SOURCE II

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

TYPE TSC SWITCH

WITH KA5TSC1 CT ACCESSORY

LOAD TAP

TYPE TSC SWITCH

WITH KA5TSC1 CT ACCESSORY

b1 a1

RECEPTACLE AND PLUG

FURNISHED WITH KA5TSC1

WIRING ACCESSORY

OPEN

"SW"

A A

TB1

GRN

21 25

24 23 26

G2 G1

16 13

S CONTROL

TRANSFER SWITCH OPERATORS

GRN

OPEN

F E D

ABC

H G

E D

F E D

C B A

H G F E D

"SW"

b1 a1

RED

WHT

BLK

RED

C C

ORG

BLK

D D

E E

BLU

ORG

E E

F F

BLU

F F

FACTORY-WIRED RECEPTACLE

AND PLUG ACCESSORY KCN55SB

(IF ACCESSORY IS NOT SPECIFIED,

WIRE SWITCH CONTROLS DIRECTLY

TO TB1, PT'S TO TB2, AND CT'S TO TB5.)

"PT"

ORG

E E

F F

BLU

G G

POTENTIAL SENSING

TRANSFORMERS

BLK

YEL

RED

GRN

28 27

IZ IY IX IN IN IC IB IA

FAULT BLOCK ACCESSORY

BLK

YEL

RED

GRN

"CT"

NOTE: FOR SINGLE-PHASE SENSING

K K

JUMPER TERMINAL A TO B TO C AND

WHT

TB2

1 G2

G C

WHT

"PT"

TERMINAL X TO Y TO Z ON TB2

A A

RED

GRN

B B

BLK

RED

B B

D D

WHT

D D

SOURCE I

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

Page 11

S260-75-1

Figure 7. Connection diagram for Type S load-transfer control operating the Type PST-6 switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

SAFETY

FOR LIFE

SOURCE I AND SOURCE II MUST

PRESENT THE SAME PHASE

ROTATION TO THE LOAD.

TYPE CI SWITCH

SOURCE II

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

COIL

LS4

(NC)

R M

LS1

SEE INSERT

FOR INTERNAL

CONNECTIONS

LS3

LS2

LS3

(NC)

(NO)

(NC)

LS4

LS2

(NO)

(NC)

TRIP

COIL

KJH

GFEDCBA

GFEDCB

10 9

GFEDCBA

4 3 2 1

INTERNAL CONNECTION DIAGRAM:

C-INTERRUPTER # 2

LOAD TAP

TYPE CI SWITCH

BCDEF

"SW"

TB5

22 21 20 191817161514131211

GFEDCBA

GFEDCB

10 9

7654321

S CONTROL

TRANSFER SWITCH OPERATORS

TB6

20 191817161514131211

10 9

7654321

BCDEF

GHJ GHJ

"PT"

EEFGH

TB2

Z Y X

2G1CBA

POTENTIAL SENSING TRANSFORMERS

RST

TUV

"PT"

AABCD

COIL

LS4

(NC)

R M

LS1

LS3

LS2

LS3

(NC)

(NO)

(NC)

LS4

LS2

(NO)

(NC)

TRIP

COIL

TSRPNML

7 65

4 3 2 1

INTERNAL CONNECTION DIAGRAM:

C-INTERRUPTER # 1

SEE INSERT FOR

INTERNAL

CONNECTIONS

MNPRS

"SW"

V U

TSRPNML

TSRPNM

NOTE: FOR SINGLE-PHASE SENSING

JUMPER TERMINAL A TO B TO C AND

TERMINAL X TO Y TO Z ON TB2

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

KEY:

NC = NORMALLY

CLOSED

NO = NORMALLY

OPEN

M = MOTOR

R = RESISTOR

SOURCE I

Page 12

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 8. Connection diagram for Type S load-transfer control operating the Type PST-9 switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)

SOURCE II

SOURCE I AND SOURCE II MUST

PRESENT THE SAME PHASE

ROTATION TO THE LOAD.

TYPE CI SWITCH

POTENTIAL

SEE INSERT

FOR INTERNAL

CONNECTIONS

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

MLKJHG

LKJHG

LS4

LS1

LS3

LS2

LS3

(NC)

(NO)

(NC)

R M

LS4

LS2

(NC)

TRIP

COIL

(NO)

COIL

10 9

LKJHG

4 3 2 1

INTERNAL CONNECTION DIAGRAM:

C-INTERRUPTER # 2

TPG2

LOAD TAP

TPG1

TYPE CI SWITCH

SEE INSERT FOR

INTERNAL

CONNECTIONS

TB1

21252423

G1 1613

14 15 11

S CONTROL

TRANSFER SWITCH OPERATORS

FEDCBA

FEDCB

"SW"

HJKLM

HJK

BCDEF

"PT"

TB2

Z Y X

2G1CBA

EEFGH

POTENTIAL SENSING TRANSFORMERS

"PT"

AABCD

COIL

LS4

(NC)

R M

LS1

LS3

LS2

LS3

(NC)

(NO)

(NC)

LS4

LS2

(NO)

(NC)

TRIP

COIL

10 9

FEDCBA

7 65

4 3 2 1

INTERNAL CONNECTION DIAGRAM:

C-INTERRUPTER # 1

NOTE: FOR SINGLE-PHASE SENSING

JUMPER TERMINAL A TO B TO C AND

TERMINAL X TO Y TO Z ON TB2

SOURCE I

KEY:

NC = NORMALLY

CLOSED

NO = NORMALLY

OPEN

M = MOTOR

POTENTIAL

SENSING

TRANSFORMERS

500 VA MIN

120 VAC, 60 HZ

SECONDARIES

R = RESISTOR

Page 13

Interconnecting Cables

Interconnecting cable conductor size is dependent upon the distance between the control, switches, and potential transformers. Maximum lengths of various cable combinations for No. 18 through No. 12 AWG conductors are shown in Table 2. The longest combination for the particular installation will determine the minimum conductor size. All cables are to be the same conductor size.

Note: If the control is equipped with the fault block accesso-

ry, see Table 3 for additional cable length limitations.

On the switch end, the cables are wired to connector plugs provided as standard with the switches. On the S control end, the cables are wired either directly to terminal blocks in the control or to connector plugs provided with the Plugs and Receptacles accessory. Figure 9 shows the location of the accessory plugs and receptacles in the bottom of the control cabinet. See the appropriate switch installation manual for the location of the plugs and receptacles on the switch.

Switch Cable

A conductor cable is required between the S control and each high-voltage switch to operate the switches. This cable is wired to a socket plug at the switch end and to either a plug or TB1 at the control end. Pin identification, and cable OD and maximum conductor size accommodated by the plugs are shown in Figures 10 and 11.

Potential Transformer Cable

A four-conductor cable is required between the S control and the potential transformers to transmit source voltage intelligence and to supply operating power for the control. This cable is wired to a five-pin socket plug or TB2 at the control end. Pin socket identification, cable OD, and maximum conductor size accommodated by the plugs are shown in Figure 12.

Note: Connectors are not supplied for the transformer end of

the cable.

S260-75-1

Maximum Length of

Cable Wire Control Cable Combinations (ft.)

Size VR, VLR, or VRV Switches TSC Switch

(AWG) A+B+D or C+B+D A+B or A+D

or C+B or C+D

18 1450 1250 16 2300 2000 14 3700 3200 12 5900 5050

TABLE 2 Maximum Control Cable Lengths

Figure 9. Plugs and receptacles accessory.

Figure 10. Switch cable plug for VR,VLR,VRV, and TSC.

Figure 12. PT cable plug.

020079KM

Note: The control cable lengths are not applicable for the C

switch and the PST switch.

Figure 11. Switch cable plugs for PST-6 and PST-9.

SAFETY

FOR LIFE

LOAD

HV SW 1

S CONTROL

HV SW 2

KEYWAY

PIN F

VIEW A-A MAX. WIRE SIZE – NO.16 AWG

PST-6 8, 7, & 19 PIN RECEPTACLES PST-9 8 & 19 PIN RECEPTACLES

8 PIN 7 PIN 19 PIN

VIEW A-A

PIN INSERT CONNECTIONS INTO CONTROL

PIN F

KEYWAY

PIN INSERT CONNECTIONS INTO CONTROL

RUBBER GROMMET ACCOMMODATES 1/2" TO 5/8" DIA. CABLE

KEYWAY

MAX. WIRE SIZE – NO.12 AWG

SOCKET INSERT – CONNECTS INTO CONTROL

SOCKET E

RUBBER GROMMET ACCOMMODATES 3/8" TO 1/2" DIA. CABLE

Page 14

Fault Block Shielded Cable

Table 3 shows the maximum distance between the control and the high-voltage switches for a range of conductor sizes and fault-block settings. The table is based on conductor voltage drop and saturation of the current sensing transformers in the switch. Lower actuating levels and lower multipliers could allow longer lines. However, the limitation on switch control cable lengths, Table 2, preclude their use.

Shielded cable is required between the transfer switches and the S control for operating the fault block accessory.

The shield must be grounded to the equipment housing at both the switch and control ends. Shield connections are made at connector plug pin or socket as shown in Figure 13. This pin mates with the receptacle pin or socket which is grounded in the switch and in the control as shown in Figures 6 and 8.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

TABLE 3 Fault Block Cable Limitations

Max. Distance in Feet

Phase Between Switch and

Actuating Con- S Control

Current ductor

Level Size For X 8 For X 6 For X 4

(Amps) (AWG) Multi- Multi- Multi-

plier plier plier

640 18 600 1000 1800 640 16 950 1600 2900 640 14 1500 2550 4600 640 12 2400 4000 7300

448 18 1100 1700 – 448 16 1800 2700 – 448 14 2800 4300 – 448 12 4500 6850 –

320 18 1800 –– 320 16 2900 –– 320 14 4600 –– 320 12 7300 ––

Figure 13. Fault block cable plug.

IMPORTANT: Only shielded cable is to be used on fault

block accessory and is mandatory to validate the Cooper Power Systems warranty . Use of a non-shielded cable could result in misoperation.

KEYWAY

PIN G

KEYWAY

SOCKET A

SOLDER #16 AWG JUMPER WIRE FROM SHIELD TO PIN G TO COMPLETE SHIELD CONNECTION

RUBBER GROMMET ACCOMMODATES .50 TO .56 DIA. CABLE

SWITCH END

CONTROL END

STRIP JACKET TO EXPOSE SHIELDING

Page 15

S260-75-1

Figure 14. Type S control front panel.

020076KM

Index No.

Figure 2 Description Purpose and Use

1 SOURCE PREFERENCE AND RETURN MODE Selects either Source I (PREF I) or Source II (PREF II) as the

Switch (S4) (See Note A) preferred source, or no preference (NO PREF). Also selected

parallel (P) or non-parallel (NP) return mode. 2 SOURCE I ENERGIZED lamp Indicates all three phases of Source I are energized. 3 OPERATION SELECTOR Switch (S3) Programs control for either AUTOmatic or MANUALoperation. 4 PREFERRED TO ALTERNATE TIMER Determines time delay before transfer to alternate source when

preferred source voltage is lost. 5 SWITCH I OPEN and CLOSED lamps Indicates status of Source I high voltage switch. 6 LAMP TEST switch (S6) Tests all indicating lamps on front panel. 7 LATCH RELAY STATUS TEST terminals Provides electrical access to both sides of latch relay to

(T1—T2—T3) determine if control is in Source I or Source II mode. 8 SWITCH II OPEN and CLOSED lamps Indicates status of Source II high voltage switch. 9 ALTERNATE TO PREFERRED TIMER Determines the time delay before transfer to preferred source

when preferred source voltage is restored.

10 MANUAL OPER. SOURCE I and MANUALOPER. Provides means to OPEN and CLOSE Source I and Source II

SOURCE II switches (S1 and S2) transfer switch upon manual command, when S3 is in MANUAL

position.

11 SOURCE II ENERGIZED lamp Indicates all three phases of Source II are energized.

12 CONTROL MODE switch (S5) Blocks automatic return transfer to preferred sources (HOLD ON

ALTERNATE); also enables control to be operated without

operating the high voltage transfer switches (TEST). 13 FAULT-BLOCK OPERATED lamp Indicates fault-block has operated (part of fault-block accessory). 14 RESET switch (S7) Resets the control after a fault block operation (part of fault-block

accessory). S3 must be in MANUAL position. 15 Fuses Voltage input of all three phases of both Source I and Source II

are fused for 10A-125 vac; white button shows on front of fuse if

fuse blows.

TABLE 4 Description and Use of Operating Controls and Indicators

Note A — Tab provided to lock switch knob in set position; stop screw prevents inadvertent selection of parallel return transfer mode.

SAFETY

FOR LIFE

Page 16

Before energizing the installation, an understanding of the functions of the operating controls and indicating lights is essential. (See Table 4 and Figure 14).

Initial Operation

To place the automatic transfer scheme into service, proceed as follows:

1. The switches on the front panel should be positioned as follows:

A. S1 (MANUAL OPER. SOURCEI) — OFF B. S2 (MANUAL OPER. SOURCE II) — OFF C. S3 (OPERATlON SELECTOR) — MANUAL D. S4 (SOURCE PREFERENCE AND RETURN

MODE) — set to the desired mode of operation.

E. S5 (CONTROL MODE) — NORMAL

2. Set the PREFERRED TO ALTERNATE TIMER and

ALTERNATE TO PREFERRED TIMER as required. (See Time Delay section in this manual.)

3. Check that all installation connections are complete as shown in the appropriate connection diagram Figures 5 through 8.

4. Make sure both high-voltage transfer switches are open.

5. With all six fuses in place, energize both power

sources to the control.

A. SOURCE I ENERGIZED lamp should be on. B. SOURCE II ENERGIZED lamp should be on. C. SWITCH I OPEN lamp should be on. D. SWITCH II OPEN lamp should be on.

6. Depending upon which source is the preferred

source, momentarily operate either S1 or S2 to the CLOSE position. The appropriate switch will close to energize the load and its status indicating lights will transfer from OPEN to CLOSED.

7. Place the OPERATION SELECTOR SWITCH (S3) to AUTO. The S control is in service. No further operation will occur until the preferred source voltage is lost.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

CAUTION: Equipment misoperation. Source I and Source II high voltage switches can be paralleled in the manual operation mode even if SOURCE PREFERENCE switch, S4, is set for NP (non-parallel operation). Make sure both sources are in synchronism if a manual parallel operation is to be performed. Failure to comply can result in misoperation (unintended operation) and equipment damage. T304.0

OPERATING INSTRUCTIONS

WARNING: Hazardous voltage. Never rely on

the open position of the operating handle or the contact position indicator; it does not ensure that the line is deenergized. Follow all locally approved safety practices. Failure to comply can result in contact with high voltage, which wil cause death or severe personal injury. G123.1

DANGER: Hazardous voltage. Contact with haz-

ardous voltage will cause death or severe personal injury. Follow all locally approved safety procedures when working around high and low voltage lines and equipment. G103.3

Page 17

Timer Settings

The two digital timers are identical. One timer controls the time required to transfer from the preferred source to the alternate source, the other timer controls the time to transfer from the alternate source to the preferred source.

The two digital timers feature the following informational indicators and adjustment controls:

Digital Time Display

LED displays the time count. The timer counts up until it reaches the time delay setting of the thumbwheel switch.

Time Range Selector

The time range selector switch can be set to six different positions with a flat screwdriver. Each position indicates a time range. See chart below. The time range selector is preset to the time range of 0.1 to 99.9 seconds.

Thumbwheel Time Setting

Set the desired time delay setting by rotating the thumbwheel switch. For example, if the thumbwheel time setting is 345 the timer will time out in 34.5 seconds based off the time range selector setting of 0.1 to 99.9 seconds.

Note: The thumb-wheel time setting, which does not turn

infinitely, should not be turned beyond the limit.

Out Indicator

The out indicator briefly lights to signal completion of a timing interval and confirm that the timer has operated.

Normal Operation

The control will react to ongoing line voltage conditions and operate automatically as programmed. If equipped with the fault block accessory, transfer to the alternate source may be prevented when loss of voltage is due to a load-side fault. See Fault Block Operating Instructions section for procedure to restore service.

THEORY OF OPERATION —BASIC S CONTROL

Refer to Figures 16 and 17 for the following sections:

Voltage Sensing

The S control will transfer the load to an alternate source when one or more phases of the preferred source is lost, provided normal voltage is present on all three phases of the alternate source. To perform this function, the control requires three-phase, low-voltage (120 Vac) input from both the preferred and alternate sources of power. Input from Source I is connected to terminals A, B, C and G1 of TB2, and input from Source II is connected to terminals X, Y, Z and G2.

Each of the three input phase leads for both Source I and Source II is shunted to ground by a capacitor–varistor combination to provide surge protection to the control. On the preferred source side of the voltage sensing circuitry, the input lines then pass through 10 Amp fuses to the voltage sensing relays: R2 (Phase A), R9 (Phase B) and R10 (Phase C). R9 and R10 are connected directly to the input while N.O. contacts of R9 and R10 are in series with the R2 coil. Thus, R2 can be energized only if all three incoming phase voltages are above a predetermined value (approximately 97 volts). A similar arrangement is used for the alternate source sensing relays. R6 can be energized only if R7 and R8 are energized. The transfer bus across the top of the schematic diagram), which provides the operating power for the control is normally energized from Phase Y. If R7 drops out, due to loss of Phase Y, R11 will be energized from Phase B (through N.C. contact of R7) to re-energize the transfer bus. The contacts of R7 and R11 are so connected that the transfer bus can never be simultaneously energized from both B and Y phases.

S260-75-1

IMPORTANT: Put control in manual mode prior to changing timer setting. There is no fault current protection when in manual mode. Failure to comply can cause unintended operation.

3.45

Figure 15. Digital Timer and Time Ranges.

IMPORTANT: Thumb-wheel time setting must be

securely turned. Incomplete setting may cause timer malfunction and control misoperation.

SAFETY

FOR LIFE

OUT Indicator

Digital Time

Display

9.99 99.9 999 99.9 999 99.9 Indication

Time

Range

OUT

3.45

0.01 to

9.99

sec

0.1 to

99.9 sec

to 999 sec

0.1 to

99.9 min

Thumb-Wheel Time Setting

Decimal Point Indicator

Time Range Selector

M H

999

min

0.1 to

99.9

hours

Page 18

Automatic Transfer, Preferred to Alternate

The following assumptions are made:

• OPERATION SELECTOR switch (S3) is in AUTO.

• SOURCE PREFERENCE and RETURN MODE

switch (S4) is in PREF l-P (Terminal 2 of each deck connected).

• CONTROL MODE switch (S5) is in NORMAL.

• S control is in a quiescent state.

• Source I high-voltage transfer switch (SW-I) is closed

and Source II high voltage transfer switch (SW-II) is open.

Note: The actuators of both high-voltage transfer switch-

es are shown in the switch open position on the schematic diagram. Following each opening operation, the motor recharges the actuator springs and the cutout switch returns to the position shown in the schematic. However, when the high voltage transfer switch is closed, the selector switch of the actuator mechanism is opposite to that shown in the schematic.

If one or more phases of the preferred source (Source I) are lost, R2 will drop out and the SOURCE I ENERGIZED lamp (L1) will go out. N.C. contacts 1-7 of R2 close completing the circuit to the PREFERRED TO ALTERNATE TlMER (TM1) through 4-7 of R6 (which is energized), 7-4 of R1, and deck J of S4. When TM1 times out, its 5-6 contacts close to energize the coil of R1 in the reset direction causing R1 to transfer. Diodes in the circuit of this single-coil magnetically held relay determine whether “latching” or “resetting” occurs.

The transfer of R1 energizes the trip coil of Source I highvoltage transfer switch (SW-I) as follows:

Transfer bus voltage passes through terminals 5-1 of S3, contact 9-3 of energized R1, and terminals 4-3 of S5. It is then impressed on N.C. contact 7-2 of R4 and passes through deck B of S4 to output terminal 13 of TB-1. Terminal 13 is connected to the internal selector switch in the actuator of SW-I (which is closed when SW-I is closed), through the trip coil to ground (terminal G).

After SW-I has opened, the selector transfers to connect terminal 3 to terminal 4, which energizes terminal 16 of TB1. In turn contacts 2-6 of S3, deck C of S4, and terminal 25 of TB-1 are energized to operate the close coil of SW-II and close the switch.

SW-I will now remain open and SW-II closed until Source I voltage is restored.

Return Transfer, Parallel Transition

When Source I power is restored on all three phases, R2 will pick up and Source I Energized lamp (L1) will light. Contact 9-6 of R2 closes to energize ALTERNATE TO PREFERRED TIMER (TM-2) through contact 8-2 of R1, and deck K of S4. After TM2 times out, its contacts 5-6 close to energize the coil of R1 through diode DL in the latching direction causing R1 to transfer.

The transfer of R1 energizes the close coil of SW-I as follows: Transfer bus voltage passes through terminals 5-1 of S3,

contacts 9-6 of latched R1, and terminals 5-6 of S5. It is then impressed on N.C. contact 7-2 of R5 and passes through deck Aof S4 to output terminal 15 of TB-1. This activates the close coil in SW-I. When SW-I closes, its auxiliary contact “a” closes to energize R5 (via TB1-24 and deck E of S4). Contact 7-5 of R5 closes to energize TB1-23 through deck D of S4. Voltage at TB1-23 will actuate the trip coil of SW-II to open the Source II highvoltage transfer switch.

Note: The Source I high-voltage switch (SW-I) closes before

the Source II high-voltage switch (SW-II) opens to effect a parallel return transition. SW-I will now remain closed and SW-II open until Source I voltage is lost or a change of control settings is made.

Return Transfer, Non-Parallel Transition

The following assumptions are made:

• SOURCE PREFERENCE and RETURN MODE switch (S4) is in PREF l-NP (Terminal 3 of each deck connected).

• Source I has lost one or more phases and the load has been transferred to Source II as previously described (SW-I open and SW-II closed).

• Control is in a quiescent state with latching relay R1 in the reset position (contacts 9-3 and 8-2 closed) and R2 is deenergized.

When Source I power is restored on all three phases, R2 will pick up, closing its contact 9-6, and energize the ALTERNATE TO PREFERRED TIMER (TM-2) through contact 8-2 of R1, and deck K of S4. After TM-2 times out, its 5-6 contact closes to energize the coiI of R1 through diode DL in the latching direction causing R1 to transfer, closing its 6-9 contact.

In this case, the trip coil of SW-II is immediately energized through the following circuit:

Terminals 5-1 of S3, N.C. contact 9-6 of R1, terminals 56 of S5, N.C. contact 7-2 of R5, and deck D of S4 to output terminal TB1-23 to activate the trip coil of SW-I I and open to Source II high-voltage transfer switch.

When SW-II opens, its selector switch transfers to impress the voltage at TB1-23 onto TB1-26 which, in turn, energizes TB1-15 through terminals 3-7 of S3 and deck A of S4. Voltage at TB-15 will actuate the quick-close coil of SW-I to close the Source I high-voltage switch.

Note: In this instance, the Source II high voltage switch (SW-

II) opens before the Source I high voltage switch closes, to effect a non-parallel return transition. SW-I will now remain closed and SW-II open until Source I voltage is lost or a change is made in the control settings.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Page 19

No Preference Mode

Assume the Source I high-voltage switch (SW-I) is closed and Source II high-voltage switch is open. With the SOURCE PREFERENCE and RETURN MODE switch (S4) in NO PREF-NP (Terminal 4 of S4 connected), loss of Source I voltage on one or more phases will open the Source I high-voltage switch (SW-I) as described in the Automatic Transfer, Preferred to Alternate section of this discussion.

Upon restoration of Source I voltage, R2 is re-energized. However, due to the positioning of decks G and H of S4, neither timer can be energized since both the N.C. contacts 1-7 of R2, and 9-3 of R6 are open (both relays are energized).

The S control is now in a quiescent state with SW-II closed and SW-I open. This condition will continue until either Source II is lost or a change is made in the control settings. If Source II is lost, delay in transfer to Source I will be timed by TM-2.

Preferred Source II Mode

With the SOURCE PREFERENCE and MODE switch (S4) in either PREF II-P (Terminal 6 of S4 connected), or PREF II-NP (Terminal 5 of S4 connected) the description of operation is similar to the “Automatic Transfer, Preferred to Alternate” and “Return Transfer, Parallel Transition” or “Return Transfer, Non-Paralleled Transition” as previously described except that Source II is the preferred source (controlled by SW-II) and Source I is the alternate source (controlled by SW-I).

Control Mode Switch, S5

If S5 is placed in the center-off TESTposition, there is no circuit to either the close or trip coils of either high-voltage transfer switch. This position of S5 is used to check sensing circuitry, timers, and the latching relay without affecting the status of the high-voltage switches.

If S5 is placed in the HOLD ON ALTERNATE position, return transfer will not occur after preferred source voltage is restored. Assume the S3 is in AUTO, S4 is in PREF l-P, and the S control is in the quiescent state with Source I high voltage (SWI) closed and Source II highvoltage switch (SW-II) open. Upon loss of Source I, R2 will again initiate a transfer of the latching relay R1 as previously described, followed by the opening of SW-I and the closing of SW-2. The S control is now in a quiescent state in which SW-2 will remain closed and SW-I will remain open even when Source I power is restored. When Source I is reenergized, R1 will transfer back to the latch position and close its contact 9-6. However, because deck L of S4 is open, power cannot be provided to the trip coil of SW-II or the close coil of SW-I.

Manual Control

When the OPERATION SELECTOR switch (S3) is placed in MANUAL, it connects the MANUAL OPER. SOURCE I switch (S1) and the MANUAL OPER. SOURCE II switch (S2) to the transfer bus. Power can then be supplied to either the close or trip coils of either SW-I or SW-II. Contacts 3-7 and 2-6 of S3 are opened in the MANUAL position so that opening of one high-voltage transfer switch does not cause automatic closing of the other. In the manual mode of operation, it is possible to have both high-voltage switches open, either switch closed, or both switches closed.

Indicating Lamps

The LAMP TEST switch (S6) is provided for checking the various incandescent indicators on the front panel of the S control. In the closed position, all the lamps will be energized through a diode network to check their condition.

In the open position, the diode network isolates the lamps from the test switch so that it has no effect on normal circuit operation.

S260-75-1

SAFETY

FOR LIFE

Page 20

General

This troubleshooting guide is intended to assist in localizing problems that may be encountered in the operation of the load-transfer scheme. After the problem area has been localized, general troubleshooting and circuit tracing techniques can be used to pinpoint the cause. A fundamental understanding of the basic operation is essential in carrying out these troubleshooting procedures. (See Theory of Operation section.)

Schematic diagrams, Figures 16 and 17, are used as references throughout this guide. The physical location of the various circuit components and terminals are identified in Figure 27.

Remove the Control from Service

The following warning only applies to controls equipped with the Fault Block Accessory:

1. De-energize Source I and Source II voltage.

2. Disconnect cables from the control.

Basic Troubleshooting

A quick check of the basic transfer operation while the control is in service can be made using the following procedure:

Source I or Source II Preferred Operation

1. Set CONTROL MODE switch (S5) to TEST. This wilI remove the control from service and allow it to operate without operating the high-voltage transfer switches.

2. Check LATCH RELAY STATUS TEST terminals (T-1, T-2) to ground (T-3). 120 V ac at T-1 indicates the control is in Source I mode; 120 Vac at T-2 indicates the control is in Source II mode. Check if this agrees with the SOURCE PREFERENCE switch setting.

3. Remove preferred source voltage by unscrewing one of the phase fuses from the applicable source. The PREFERRED TO ALTERNATE TIMER will start.

4. When the timer runs out, the latch relay (R1) will transfer; indicated by a transfer of the 120 Vac signal at the test terminals.

5. Replace the removed fuse to re-energize the preferred source. The ALTERNATE TO PREFERRED TIMER will start.

6. When the timer runs out, the latch relay (R1) will transfer back to its original operating position.

7. Return the CONTROL MODE switch (S5) to NORMAL to return the control to service.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

TROUBLESHOOTING—BASIC S CONTROL

IMPORTANT: If Control Mode Switch S5 is placed in the “Normal” position, the S-control will place the highvoltage transfer switches into the configuration that is currently selected by the Source Preference Switch S4. This may result in an unintended transfer. Make sure the desired state of the high-voltage transfer switches match the setting of S4 before returning S5 to the “Normal” position.

WARNING: Hazardous voltage. Solidly ground all equipment. Failure to comply can result in

death, severe personal injury, and equipment damage.

T223.2

CAUTION: Equipment misoperation. Do not

WARNING: Hazardous Voltage. De-energize

switchgear before attempting to disconnect control cable from control. Failure to do so may result in contact with high voltage pulse (300V peak) from the CT protection circuit. Failure to de-energize switchgear can result in contact with high voltage, which will cause death or severe personal injury. G124.0

DANGER: Hazardous voltage. Contact with haz-

ardous voltage will cause death or severe per-

sonal injury. Follow all locally approved safety procedures when working around high and low voltage lines and equipment. G103.3

Page 21

S260-75-1

No Preference Operation

1. Set CONTROL MODE switch S5 to the TEST position. This will remove the control from service and allow operation without operating the high-voltage transfer switches.

2. Check the setting of the SOURCE PREFERENCE switch (S4). It should be in the center No Preference position.

3. Check LATCHRELAY STATUS TEST terminals (T-1, T-2) to ground (T-3). 120 V ac at T-1 indicates the control is in the Source I mode. 120 Vac at T-2 indicates the control is in the Source II mode.

4. Remove source voltage by unscrewing one of the phase fuses from Source I if T-1 is energized or from Source II if T-2 is energized. If a Source I fuse is removed, the PREFERRED TO ALTERNATE TIMER will start. If a Source II fuse is removed, the ALTERNATE TO PREFERRED TIMER will start.

5. When the timer runs out, the latch relay (R1) will transfer as indicated by a transfer of the 120 Vac signal at the test terminals.

6. Replace the removed fuse to re-energize the power source. No timers will start and latch relay (R1) will not transfer.

7. Unscrew one of the phase fuses from the other source. If a Source II fuse is removed, the ALTERNATE TO PREFERRED TIMER will start. If a Source II phase fuse is removed, the PREFERRED TO ALTERNATE TIMER will start.

8. When the timer runs out, the latch relay (R1) will transfer back to its original operating position, again indicated by a transfer of the 120 Vac signal at the test terminals.

9. Replace the removed fuse to re-energize the power source. No timers will start and latch relay (R1) will not transfer.

10. Place the CONTROL MODE switch (S5) to the normal position. If switch S5 is left in the TEST position, the S control will be inoperative on automatic operation.

Indicating Lamps

Although not essential to control operation, the indicating lamps provide useful operating information. All lamps are 120 Vac operated half-wave through diodes.

For a quick check of the lamp diodes, depress the LAMP TEST switch, S6. The two OPEN and two CLOSE lamps should glow with equal brilliance, the green appearing slightly less intense, and the SOURCE I ENERGIZED and SOURCE II ENERGIZED lamps should noticeably increase in brilliance (these lamps are energized from two phases, 120 degrees apart, instead of a single bus).

Note: The OPEN lamp circuit includes the impedance of

the close coil or motor of the high-voltage switch actuator.

Verification of Fuses

Fuses can be checked on the front panel of the control. If the fuses are blown and require replacement, the white buttons on the front panel will show. Refer to item 15 in Figure 13 and Table 4.

Advanced Troubleshooting

Use the output of the control procedure to determine if the problem lies in the control or the high-voltage switches. If the conditions of the output procedure are satisfactory, test the high-voltage switch. If the conditions of the output procedure are unsatisfactory , test the manual control functions. If the conditions of the manual control functions procedure are satisfactory, test the automatic control functions.

IMPORTANT: The control should be removed from service prior to conducting the advanced troubleshooting procedures.

SAFETY

FOR LIFE

Page 22

Output of the Control

To determine if the problem is in the control or the highvoltage transfer switch, proceed as follows:

1. Disconnect the switches from the control.

2. Place OPERATION SELECTOR switch (S3) to

MANUAL.

3. Place SOURCE PREFERENCE and RETURN MODE switch (S4) to NO PREF.

4. With the control energized, check the voltage to ground at the “Transfer Switch Operators” terminal board, TB1, per Table 6.

5. If these output voltages are obtained, check the highvoltage switch. If the output voltages are not obtained, check the manual control functions.

High-Voltage Switch

Normal control output at TB1 but failure to operate suggests a malfunctioning switch.

1. With an ohmmeter, check the resistance between points of the high-voltage switch actuator per Table 5.

2. If the control circuit of the switch operator checks out, the trouble may be mechanical. Refer to the maintenance manual for the switch.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Switch Ohmmeter Reading

Receptacle

Pin Switch Open Switch Closed

Type VR, VLR, VRV — Standard Operator

B to C Motor ∞ B to D ∞ Trip Coil B to E ∞ 0 D to F 0 0

Type VR, VLR, VRV — Quick Close Operator

A to D * ∞ B to C Quick Close Coil ∞ B to D ∞ Trip Coil B to E ∞ 0 D to F 0 0

Type TSC

B to C Motor ∞ B to F ∞ Motor B to E ∞ 0 D to F 0 ∞

Type PST-6 with C Interrupter #1

E to R Close Coil ∞

M to N ∞ 0

P to E * ∞ S to V 0 ∞ T to U ∞ Trip Coil

Type PST-6 with C Interrupter #2

B to C ∞ 0 D to E * ∞ E to F Close Coil ∞ G to K 0 ∞

H to J ∞ Trip Coil

Type PST-9 with C Interrupter #1

E to F ∞ A to C ∞ C to E ∞ B to C ∞ C to D ∞

Type PST-9 with C Interrupter #2

L to M ∞ 0 G to J 0 ∞

J to L ∞ Trip Coil H to J * ∞ J to K Close Coil ∞

TABLE 5 Continuity Check of High-Voltage Switches

* Will read motor resistance if closing spring is not charged, will

read infinity if closing spring is charged.

Page 23

Manual Control Functions

Abnormal output readings at TB1 indicate a malfunctioning control. This procedure describes the terminal functions under manual direction and suggests areas for investigation.

1. Terminals 11 and 21 provide the power to charge the springs in the switch actuator and are constantly energized. If terminals 11 and 21 are not energized, the transfer bus is not energized.

A. Make sure that either phase B of the preferred

source or phase Y of the alternate source is energized. These phases supply the transfer bus. Measure beyond the fuses.

B. Relays R7 and R11 control power to the transfer

bus. Relay R7 picks up when phase Y is energized; Relay R11 picks up if phase B is energized and phase Y is deenergized.

2. Terminals 15 and 25 provide 120 Vac closing power (15 closes Source I switch, and 25 closes Source II switch). Terminals 13 and 23 provide 120 Vac opening power (13 opens Source I switch and 23 opens Source II switch).

A. Terminals 13, 23, 15 and 25 are energized from

the transfer bus through the MANUAL OPER. switches, S1 and S2.

(1) If the control is equipped with the fault block

accessory, normally closed contacts of the fault block relay (RY1) are connected between tabs FP and FR of the relay tie board to complete the circuit to terminal 15 and between tabs FS and FT to complete the circuit to terminal 25.

(2) If the control does not use the fault block

accessory, jumpers are provided between tabs FP and FR and FS and FT of the relay tie board to complete the closing power circuits to the transfer switches.

3. Terminals 14 and 24 are grounded by an “a” contact (N.O.) in the H.V. transfer switches to energize relays R4 and R5 respectively during the “opening” half of a parallel return transfer.

4. Terminals 16 and 26 are energized (120 Vac) on the “closing” half of a non-parallel return transfer. They are energized from a “b” contact (N.C.) in the H.V. transfer switches; 16 is energized from Source I high- voltage switch and 26 is energized from Source II high-voltage switch.

Automatic Control Functions

The control may operate properly by manual direction but malfunction in its automatic mode. The automatic section responds to the positions of R2 and R6 in conjunction with the selected operating mode as set on S4, the SOURCE PREFERENCE and RETURN MODE switch. Its output is the single-coil latching relay, R1.

1. R2 is energized from phase A of Source I through N.O. contacts of R9 in phase B and R10 in phase C. The action of R2 can be observed through its transparent cover and can be checked electrically across tabs 31 and 32 on the relay tie board which connect to a N.C. contact of the relay.

2. R6 is similarly energized from phase X of Source II through R7 in phase Y, and R8 in phase Z. Tabs 41 and 42 connect to a N.C. contact of R6.

3. Operation of the appropriate time delay relay can be checked by verifying that the LED timer is illuminated.

4. The single-coil latching relay (R1) is electrically operated and magnetically held. It is latched directly from the 120 V ac transfer bus through diode DLin the automatic mode or diode DL1 in the manual mode. It is reset through the 15 K ohm resistor and either diodes DR or DR1.

5. With the control in an automatic mode of operation, the position of the latching relay can be determined at the Latching Relay Test jacks (T1, T2, T3) on the front panel of the control.

A. When 120 Vac is present between T1 and T3, the

relay is in the “latched” position and the control seeks to connect the load to Source I.

B. When 120 Vac is present between T2 and T3, the

relay is in the “reset” position and the control seeks to connect the load to Source II.

C. If the latching relay assumes the expected position

after the proper time delay, the automatic section of the control is functioning properly.

S260-75-1

TABLE 6 Voltage Readings on TB1

Voltage to Ground

MANUAL OPER. MANUAL OPER.

Term SOURCE I SOURCE II

on Switch (S1) Switch (S2)

TB1 Quiescent Close Open Close Open

11 120 Vac 120 Vac 120 Vac 120 Vac 120 Vac 15 170 Vdc* 120 Vac 170 Vdc* 170 Vdc* 170 Vdc* 14 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc* 13 0 0 120 Vac 0 0 160 0000

260 0000 23 0 0 0 0 120 Vac 24 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc* 25 170 Vdc* 170 Vdc* 170 Vdc* 120 Vac 170 Vdc* 21 120 Vac 120 Vac 120 Vac 120 Vac 120 Vac

* Rectified 120 Vac impressed on capacitor. Drops to 0 if LAMP TEST

switch (S6) is depressed.

SAFETY

FOR LIFE

Page 24

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 16a. Schematic diagram basic S control operating Types VR,VLR,VRV,TSC, or PST-9 switchgear (page 1 of 2).

SAFETY

FOR LIFE

Page 25

S260-75-1

Figure 16b. Schematic diagram basic S control operating Types VR,VLR,VRV,TSC, or PST-9 switchgear (page 2 of 2).

SAFETY

FOR LIFE

Page 26

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 17a. Schematic diagram for Type S control operating Type PST-6 switchgear (page 1 of 2).

Page 27

S260-75-1

Figure 17a. Schematic diagram for Type S control operating Type PST-6 switchgear (page 2 of 2).

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Page 28

The fault block accessory is mounted in the upper right corner of the back panel of the control, Figure 18. Controls and instructions for operating the accessory are located on the front panel above the input fuses, Figure 19.

General Description

In response to fault current above preselected phase or ground levels, the accessory is activated and latched to disable both high-voltage switches. Thus a load-side fault followed by loss of potential will result in partial load transfer opening the connected source but not closing the faulted load into the alternate feeder.

The accessory must be manually reset at the control panel to restore service to the load. If activation of the fault block accessory is due to a temporary fault (preferred source voltage is restored before the transfer delay timer runs out), line current of 5 Amps, or more, flowing through the high-voltage switch will automatically reset the accessory in approximately 10 to 15 seconds.

To prevent the fault block accessory from being activated due to inrush current that may occur as a result of the backup opening and closing, an inrush restraint feature is built into the accessory logic. Upon loss of the preferred source voltage, the inrush restraint operates to increase the phase fault actuating level by a predetermined multiple for a predetermined time after voltage is restored. Simultaneously, ground fault current detection is blocked completely for the same time interval. When the time runs out, both the phase and ground current actuating levels return to their normal values.

To operate the fault block accessory, the Source I and Source II high-voltage switches must be equipped with 1000:1 ratio current transformers to monitor the magnitude of the line current and an auxiliary “a” contact. The bushing current transformers and associated wiring are provided as a factory-installed accessory to the high-voltage switch.

Accessory Settings

The selected phase and ground fault actuating levels should be greater than any peak load phase current or zero-sequence (ground) current, but less than the trip setting of the backup protective device. A general recommendation is to set the phase and ground actuating levels to approximately 80% of the phase and ground trip levels of the backup.

The phase fault current minimum actuating level is determined by a plug-in circuit card, Figure 20. Cards are available for 80, 112, 160, 224, 320 and 448 Amp actuating levels. The ground fault current minimum actuating level is determined by a resistor cartridge that clips on to the phase card. Cartridges are available for 10, 14, 20, 28, 40, 56, 80, 112, 160, 224, 320 and 448 Amp actuating levels.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 19. Fault block accessory controls and operating instructions plate.

020077KM

INSTRUCTION LABEL

Provides instructions

for resetting the

fault block accessory.

RESET SWITCH (S7)

Reactivates the S control

after a fault block operation.

FAULT BLOCK OPERATEDSWITCH Indicates that the fault block accessory has operated.

FAULT BLOCK ACCESSORY

(Applicable to VR, VLR, VRV, TSC, CS, and PST-6 switchgear.)

Figure 18. Fault block accessory mounted in upper-right corner of the back panel.

ACTUATING LEVELPRINTED CIRCUIT CARD (FIGURE 18)

TERMINAL BLOCK FOR EXTERNAL CONNECTIONS

RAISED FAULT LEVEL DURATION TIMER

020080KM

Page 29

The actuating level multiplier for the inrush restraint feature for phase faults is set by a jumper wire connected to a tab on the circuit card. Tabs are provided for X1, X2, X4, X6, X8 and BLOCK settings. The duration of the raised level is set by a knob on the top of the timer (Figure 18). The timer is infinitely adjustable 0.1 to 5.0 seconds. No settings are required for ground inrush since it is automatically blocked for the duration the phase level is raised.

Operating Instructions

The FAULT BLOCK OPERATED lamp on the front panel of the control, Figure 19, will light when the fault block accessory is activated. To reset the accessory:

1. Move the OPERATION SELECTOR switch (S3) to MANUAL.

2. Depress and hold the RESET switch (S7) until the lamp goes out, (approximately 6-10 seconds) indicating the accessory has reset.

3. To restore service, return the OPERATION SELECTOR switch (S3) to AUTOMATIC; the preferred source high voltage switch will close.

Operate either the MANUAL OPER. SOURCE I switch (S1) or the MANUAL OPER. SOURCE II Switch (S2), as applicable, to restore service manually.

Note: Instructions for operating the fault block accessory

also are printed on the front panel of the control (Figure 19).

Theory of Operation —Fault Block Accessory

The fault block accessory prevents automatic closure into the alternate source when loss of preferred source results from a fault on the load tap. The schematic diagram for the fault block accessory, Figure 21, is used as reference throughout this discussion.

Overcurrent Sensing

The output of bushing current transformers in both the Source I and Source II high voltage switches are applied to the fault block accessory via terminals lA, IB, IC, IN and IX, IY, IZ, IN respectively. When the load current through the switch exceeds the phase or ground actuating level selected, the relay contacts in the fault block accessory (contacts 7-8 and 10-11 of relay RY1-B), located in the closing circuits of both high voltage switches, are opened. Subsequent closing of either switch is blocked in either the automatic or manual mode of the S control until the fault block accessory circuitry is reset.

Phase Fault Operation

Referring to the accessory schematic diagram, Figure 21, the phase currents are rectified by the diode bridges D103 through D116. Current out of the positive side of the bridge passes through diode D127 and divides into two parallel circuits. One circuit consists of zener D123 and the minimum phase actuating resistor R301 to the other side of the bridge. The other circuit consists of normally closed contact (1516) of latching relay RY1, diode D201, and capacitor C201 to the other side of the bridge. C201, charged by load or fault current, provides tripping energy for RY1.

The current through R301 produces a voltage drop proportional to the line current which is impressed across the series resistor string R101, R102, and R103. A portion of this voltage is applied through diode D120 to the base of transistor Q201.

When this voltage exceeds the break-down voltage of zener D212 and the base emitter junctions of Q201 and Q202, Q201 will conduct causing Q204 to conduct. In turn, Q204 provides the gating current to turn on the SCR (Q206) to discharge capacitor C201 through the trip coil of the latching relay RY1. Contacts 10-11 and 7-8 of RY1 (in series with the close coils of the high voltage switches) open to prevent the high voltage switches from closing until the fault block circuitry is reset.

An important feature of this accessory is that a trip signal cannot be initiated until there is sufficient charge on C201 to activate the trip coil of RY1. Transistors Q201 and Q204, effectively in series across C201, cannot conduct until the voltage across C201 is sufficient to break-down zener diodes D211 and D212.

S260-75-1

Figure 20. Phase fault current actuating level printed circuit card.

020078KM

PHASE CURRENT LEVEL MULTIPLIERSETTING FOR INRUSH CURRENT RESTRAINT.

GROUNDACTUATING CURRENT RESISTOR CLIPS TO THE PHASE CARD

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Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 21a. Schematic diagram – fault block accessory (page 1 of 2).

SOURCE I H.V. SWITCH

BØ

CØ

AØ

BØ

CØ

SOURCE II H.V. SWITCH

PART OF RESISTOR BOARD

GROUND ACTUATING RESISTOR R306

SOURCE II H.V. SWITCH

SOURCE I H.V. SWITCH

Page 31

S260-75-1

SAFETY

Figure 21b. Schematic diagram – fault block accessory (page 2 of 2).

FOR LIFE

MANUAL

V103

RY1

D201

TRIP RESET BOARD

D26

RY1

D203

R209 47K

R210

Q201

D212

5.1V

1N4733A

D211

6.8V 1N4736A

R208

3.9K

R211 100K

C204

3.0

C210

0.1

R218 1K

D207

R212

3.3MEG

R202

470

C206 12

C209

0.1

R217

200V

47K

R207 680K

D201

Q202

R205

100

R216 47K

D209

R206 68K

Q204 2N2905

R204 10K

R203

3.3K

R213

1.8K

Q205 2N6119

R214

56K

C203

5.6

C207

1.0

35V

C205

0.1

R215 47K

D206

Q203

D204

D202

D208

Q206 C5V

C201 150

C208 200V

C202 150

RY1

TRIP COIL

0.1 S7

RESET 3PST MOMENTARY

RY1 RESET COIL

(120V BUS)

TB4-1

TB4-2

TB4-3

120V IN MANUAL

TB4-4

TM1-2

TM1-3

TM2-2

TM2-3

AUTO

R201

6.8K-2W

RY1

NO CONNECTIONS

NOTE LATCH RELAY CONTACTS (RY1) SHOWN WITH RESET COIL LAST ENERGIZED UNLESS OTHERWISE NOTED: DIODES ARE 1N4004 TRANSISTORS ARE 2N2102 RESISTORS ARE 1/2 WATT RESISTOR VALUES ARE IN OHMS CAPACITOR VALUES ARE IN MICRO-FARADS

D205

LEGEND ACCESSORY TERMINAL BLOCK (TB5) ACCESSORY TIEBOARD TERMINAL RELAY PIN (RY1 & RY2) EDGE CONNECTOR TERMINAL

(DIODE BOARD) (RESISTOR BOARD) (TRIP-RESET BOARD) TAB ON RELAY BOARD OF S CONTROL

TB4 TERMINAL STRIP OF S CONTROL S3 & S7 TERMINALS TM1 (PREFERRED TO ALTERNATE TIMER) AND

TM2 (ALTERNATE TO PREFERRED TIMER) TERMINALS

Page 32

Ground Fault Operation

The ground current (the vector sum of the phase currents) flows through the ground actuating resistor, R306, to produce a voltage across the primary of input transformer TR1, proportional to the ground current. This voltage is stepped-up, rectified, and impressed across the series resistor string R104, R105, R106 and R107. Aportion of this voltage is applied to the base of Q201 through diode D119. From this point, ground and phase operations use common circuitry described in the preceding “Phase Fault operation” discussion.

Reset Circuits

Once actuated, the fault block accessory can be reset in either of two ways.

•Manually—Actuating the Reset Switch, S7, on the front panel of the S control, will apply 120 Vac to terminal G of the fault block accessory tie board. This voltage is rectified by diode D205 and applied to the reset timing circuit, which consists of R201, C206, and the programmable uni-junction (PUT) Q205. This voltage is also applied to capacitor C202, which provides energy to the reset coil of latching relay RY1. When the voltage across C206 reaches the breakdown voltage of the PUT, transistor Q203 is then turned on causing C202 to discharge through the reset coil of RY1. The relay transfers and the fault block accessory is now reset.

Note: S7 is energized only when the Operation Selector

switch is in MANUAL.

• Automatically—by load current below the minimum actuating level flowing through the highvoltage switch. The voltage developed by the load current is applied through contact 16-17 of RY1 to the reset timing circuit R207, C206, and Q205.When the voltage across C206 reaches the breakdown voltage of the PUT, Q203 is then turned on causing C202 to discharge through the reset coil of RY1. The latching relay transfers and the fault block accessory is reset.

Note: If the load current is above

the actuating level of the accessory, both manual and automatic reset is defeated by Q202 which conducts to short-out the reset timing capacitor C206 through resistor R205.

Inrush Restraint Feature

The inrush restraint feature raises the actuating level of the fault block accessory by a multiple (or blocks its operation entirely) for a period following restoration of source voltage or an automatic open transition transfer operation, to prevent inrush currents from activating the fault block.

Relay RY2 is normally energized by the phase B or phase Y voltages from the S control via the “a” auxiliary contacts in the two high-voltage switches. When both B and Y phase voltages are lost due to operation of a backup device or opening of the high-voltage switches, the coil of RY2 is de-energized, closing its contacts. Contact 1-4 closes to insert a paralleling resistor across the phase actuating resistor R301, reducing its effective value and increasing the line current necessary to actuate Q201. Contact 5-8 of RY2 closes to short-out the secondary of TR1, rendering the ground section operative.

Upon re-energization of either Phase B or Phase Y through closing of the backup devices or the closing of the high-voltage transfer switches, relay RY2 is energized. RY2 has a built-in time delay programmable by means of a knob in the top of the relay case. After the selected time delay has elapsed, N.C. contacts 1-4 and 5-6 open, returning the fauIt block accessory to normal operation.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 22. Test circuit for testing and troubleshooting the fault block accessory.

Page 33

Testing Fault Block Operation

The operation of the fault block accessory can be checked by backfeeding a 500:5 (or other available ratio) current transformer, located in the primary loop of one phase of the preferred source high-voltage switch, from a variable 120 V ac source. The 500:5 ratio provides approximately 1 Amp of output test current for every 10 mA of input current. However, to eliminate error due to CT saturation, a separate metering CT and meter should be used to read the actual test current.

Test Circuit and Equipment

A suggested test setup is shown in Figure 22. If the control is equipped with the plug and receptacle accessory, use the existing cables to interconnect the motor operators of both high-voltage switches and the CT sensing circuits of the preferred source switch to the S control. If plugs and receptacles are not provided, wire the switches directly to the appropriate terminal blocks as shown in Figures 6 or 8.

Test Procedure and Troubleshooting

Phase Minimum Actuating Current

1. Disable the ground sensing circuit by shorting the

ground fault resistor (Figure 22).

2. Set the inrush current multiplier at X1.

3. Close test circuit switches SW2 and SW3 to apply

voltage to the control. The preferred source high-voltage switch (HV1) will

close.

4. Close test switch SW1 and slowly raise the test current until the FAULT BLOCK OPERATED light goes on.

The test current should be within the limits specified in Table 7.

If FAULT BLOCK OPERATED light fails to come

on at the expected level, proceed as follows:

A. Check lamp with LAMP TEST switch (S6). B. Recheck calculations for proper meter reading. C. Is ground resistor cleanly shorted out? D. Did latch relay R1 transfer position?—lamp is only

an outward indication of relay position.

E. Are all cable connections secure?

F.Voltage from Accessory Tie Board, Tab D to

Ground, Tab L, should be approximately 15 Vdc, average, at actuating level. If observed voltage is approximately 6 volts too low, trouble is probably in the Trip Reset Board; if voltage is too high, trouble is probably in either Diode or Resistor Boards.

G. AC rms voltage from “IN” to “IA” (or whatever

phase is energized) should be about 17 V at actuating level. If correct voltage is observed, the CT input is correct.

S260-75-1

Figure 23. Disabling ground sensing circuit.

020082KM

Actuating Actuating Current Limits

Current (Amps)

Setting (Amps) Minimum Maximum

10 9 11 14 12.6 15.4 20 18 22

28 25.2 50.8 40 36 44 56 50.4 61.6

80 72 88 11 2 101 123 160 144 176

274 247 301 320 250 352 448 403 493

TABLE 7 Test Current Values for Fault Block Accessory

WARNING: Hazardous voltage caused by back-

feeding transformers. Isolate potential transformers from source bushings using potential transformer dead-break disconnect switches located on the source-side panel. Failure to do so will result in risk of possible contact with high voltage at the source bushings, which may cause death or severe personal injury .

T273.0

IMPORTANT: When checking the phase minimum actuating current the ground fault sensing portion of the accessory must be disabled. Testing on an individual phase basis without disabling ground fault sensing will cause the accessory to activate at the ground fault level.

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Page 34

5. Open SW1 and SW2 to simulate a backup clearing

the fault. The PREFERRED TO ALTERNA TE TIMER will start

and the preferred source high-voltage switch (HV1) will open when the timer runs out, but the alternate source high-voltage switch (HV2) will not close.

If alternate source switch (HV2) closes and the latch relay (R1) contacts are not opening, check for open contact between Accessory Tie Board tabs P and R (Source I HV switch) and tabs S and T (Source II HV switch).

6. Place OPERATION SELECTOR SWITCH (S3) to manual, and operate MANUAL OPER SOURCE I switch (S1) and MANUAL OPER SOURCE II switch (S2) to CLOSE.

HV switch (HV1 or HV2) will not close. If either switch closes and the latch relay (R1) con-

tacts are not opening, check for open contact between Accessory Tie Board tabs P and R (Source I HV switch) and tabs S and T (Source II HV switch).

7. Close test switch SW2 to restore preferred source voltage to the control. After the ALTERNATE TO PREFERRED TIMER runs out, reset the fault block accessory per instructions on the front panel.

The FAULT BLOCK OPERATED light will go out and the preferred source high-voltage switch will close.

If the FAULT BLOCK OPERATED light does not go out, the problem is most likely in the TRIP RESET BOARD.

Follow steps 8 through 11 to conduct a complete check involving all the phases of both high-voltage switches.

8. Connect the phases in series as shown in Figure 24 and retest.

Because of the series hook-up, pickup should occur at 1/2 the actuating current setting.

If pickup current is other than 1/2 of setting, the polarity of a CT could be reversed.

9. Connect another two phases in series as shown in Figure 25 and retest.

Results should be the same as in preceding step 8.

10. Repeat step 8 and 9 for the other high-voltage switch to complete checking all six CTs, their connections and polarity.

11. Remove the shorting jumper from the ground fault resistor upon completion of phase testing.

Ground Minimum Actuating Current

When checking the ground minimum actuating current, the phase fault sensing portion of the accessory circuit must be disabled to prevent the possibility of erroneous test results. Proceed as follows:

1. Disable the phase sensing circuit by placing a shorting jumper from the BLOCK tab on the phase resistor card to tab L on the accessory tie-board (Figure 26).

2. Repeat steps 2 through 7 of the Phase Minimum Actuating Current test procedure.

Automatic Reset of Fault Block

1. Close test switches SW2 and SW3 to supply voltage

to the control. The preferred source high-voltage switch (HV1) will

close.

2. Close SW1 and raise the test current until the FAULT BLOCK OPERATED lamp lights indicating that fault block has been activated.

3. Open SW2 to simulate the back-up device opening and simultaneously open SW1 to clear the fault.

The PREFERRED TO ALTERNATE TIMER will start to run.

4. Close SW2 to simulate reclosing of Source 1 backup device. Quickly close SW1 and raise the test current to greater than 5 Amps but less than ground actuating level.

The FAULT BLOCK OPERATED lamp will go out in about 10-15 seconds indicating the accessory has reset.

If FAULT BLOCK OPERATED lamp does not go out, the trouble is most likely in the Trip-Reset board (assuming the previous tests had passed).

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Figure 24. Test Connections for Step 8.

Figure 25. Test Connections for Step 9.

JUMPER

Page 35

Inrush Restraint

The inrush-restraint feature prevents inrush currents above the minimum actuating level from actuating the accessory. This is accomplished by raising the phase actuating level by some multiple for a predetermined time after service is restored. Ground actuating level detection is blocked for the duration of the raised phase actuating level. Proceed as follows:

1. Disable the ground sensing circuit by shorting the ground fault resistor (Figure 26).

2. Set the inrush-restraining multiplier on the phase actuating card and the raised fault-level duration on the timer to the values at which they are to be checked.

3. With the preferred source high-voltage switch (HV1) closed, close test switch SW1 and raise the equivalent test current to a value above the maximum actuating level for the setting, but below the multiplied setting. (See Table 7 for maximum current test values.)

4. Without disturbing this current setting, open SW1.

5. Close test circuit switches SW2 and SW3 to apply

voltage to the control.

6. Momentarily close and open SW1 before the raised duration timer runs out, to simulate an inrush current.

The FAULT BLOCK OPERATED lamp will not light. If the FAULT BLOCK OPERATED lamp does light,

proceed as follows: A. Recheck current calculations. (Test current should

exceed actuation level but be less than inrush level.)

B. Check if momentary faults were applied before

timer elapsed.

C. Check if timing relay picked up after either HV1 or

HV2 was closed. Check presence or absence of 120 Vac at Accessory Tie Board terminal 17 when HV1 operates and terminal 28 when HV2 operates.

D. Check for trouble in delay relay contacts or resis-

tor board.

7. Close SW1 and leave closed to simulate a permanent fault on the load side.

The FAULT BLOCK OPERATED lamp will light after the raised duration timer runs out.

If FAULT BLOCK OPERATED lamp does not light, the problems are similar to step 6 above.

8. Open switches SW2 and SW3 to remove voltage from the accessory.

9. Raise the test current to a value just above the raised multiple value.

10. Without disturbing this current setting, open SW1.

11. Again close switches SW2 and SW3 to apply voltage

to the control.

12. Close SW1 to simulate a high-level fault on the load side of the switch.

The FAULT BLOCK OPERATED lamp will light immediately indicating the fault is greater than the inrush current restraining setting.

If FAULT BLOCK OPERATED lamp does not light immediately, then

A. Recalculate expected current. B. Verify that jumper on resistor board is on correct

tab.

If FAULT BLOCK OPERATED lamp still does not light immediately, the resistor board may be defective. Contact your Cooper Power Systems representative.

13. Remove the shorting jumper from the ground fault actuating cartridge upon completion of the test.

Return the Control to Service

1. The control must be programmed with all the necessary operating settings and verified by the appropriate personnel prior to operation with energized switchgear.

2. Verify status of high voltage switches according to system requirements.

3. Reconnect cables and ground the control.

4.Apply Source I and Source II voltage to the control.

S260-75-1

Figure 26. Disabling phase sensing.

020083KM

“BLOCK” TAB

“L” TAB

CAUTION: Equipment misoperation. Do not

G118.1

T304.0

SAFETY

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Page 36

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

Tables 21 through 40 identify the point-to-point wiring between circuit components.

Tables 36–40 apply to S Controls with the Fault Block Accessory.

The physical location of the circuit components and their terminals identification are shown in Figure 27.

Figure 27. Location of circuit components wiring terminal identification.

WIRING TABLES

TB5

16 26 23 24 25 21

11 15 G 14 13

A B C X Y Z

TB2

A B C G1 G2 X Y Z

TB1

G2 26 23 24 25 21

11 15 14 13 16 G 1

FU–Z

FU–XFU–Y

FU–C

FU–B

FU–A

17 18 IA IB IC IN IN IX IY IZ 27 28

12 11 10 9

XYZ

BCAGJ

4 3 2 1

8 7 6 5

3 4 5 6

TM1

3 4 5 6

2 1 8 7

TM2

2 1 8 7

D411MK

123

567

101112

IA IB IC IX IY IZ G D IN

TB3

I 42 33 34

31 32 44 43 41

FN FP FR

TB4

1 2 3 4

12 II R R1 L L135 22 45

FG FS FT

1 3 5

1 2 3 4

W U S P M 17 28

2 4 6

V T R N L

ABCX

S4 – SOURCE PREFERENCE

– RETURN MODE SWITCH

S5 – CONTROL MODE SWITCH

S6 – LAMP TEST SWITCH

L1 – SOURCE I ENERGIZED LAMP

L2 – SOURCE II ENERGIZED LAMP

L3 – SWITCH I – OPEN LAMP

L4 – SWITCH I – CLOSED LAMP

L5 – SWITCH II – OPEN LAMP

L6 – SWITCH II – CLOSED LAMP

A – SURGE PROTECTOR CIRCUIT BOARD

D – DIODES CIRCUIT BOARD

R – RELAY TIE BOARD

TB1 – TRANSFER SWITCH OPERATORS TERMINAL BLOCK

TB2 – POTENTIAL SENSING TRANSFORMERS TERMINAL BLOCK

TB3 – INTERMEDIATE TERMINAL STRIP

TB4 – INTERMEDIATE TERMINAL STRIP

TM1 – PREFERRED TO ALTERNATE TIMER

TM2 – ALTERNA TE TO PREFERRED TIMER

T1-T2-T3 – LATCH RELAY STATUS TEST JACKS

FAULT BLOCK ACCESSORY

FB – FAULT BLOCK TIE BOARD

TB5 – FAULT BLOCK TERMINAL BOARD

S7 – RESET SWITCH

L7 – FAULT BLOCK OPERATED LAMP

FU – PHASE FUSES

S1 – MANUAL OPER – SOURCE I SWITCH

S2 – MANUAL OPER – SOURCE II SWITCH

S3 – OPERATION SELECTOR SWITCH

Page 37

S260-75-1

“A”

Surge Protector Circuit Board

From To Color

A FU-A-1 BRN B FU-B-1 ORG C FU-C-1 GRN G Stud on WHT

Cabinet X FU-X-1 VIO Y FU-Y-1 WHT Z FU-Z-1 BRN/WHT

11 TB1-11 BRN 13 TB1-13 YEL 14 TB1-14 ORG

RA(B-7)* ORG 15 TB1-15 RED 16 TB1-16 GRN 21 TB1-21 BLK 23 TB1-23 VIO 24 TB1-24 GRY

RA(A-7)* GRY 25 TB1-25 WHT 26 TB1-26 BLU

TABLE 8

“D”

Diodes Circuit Board

From To Color

I S6-1 RED

II S6-10 BRN

G S6-7 BRN L3 L3-2 BRN L4 L4-2 RED L5 L5-2 ORG L6 L6-2 YEL L7 TB4-1 ORG 11 S6-5 RED 14 S4(F-C) YEL 15 TB1-15 BLU 24 S4(E-C) GRN 25 TB1-25 GRN

TABLE 9

TB2

Input Terminal Block

From To Color

A FU-A-1 RED B FU-B-1 YEL

C FU-C-1 BLU

G1 C-2 WHT

TB2-G2 WHT

G2 TB1-G2 WHT

TB2-G1 WHT X FU-X-1 GRY Y FU-Y-1 BLK Z FU-Z-1 RED/WHT

TABLE 11

TB1

Output Terminal Block

From To Color

TB1-G2 WHT

G1 Screw on WHT

Back Panel

G2 TB1-G1 WHT

TB2-G2 WHT

R-1 BLK

11 TB1-21 BLK

A-11 BRN S1-3 BLK

13 A-13 YEL

R-47 BLK

14 S4(F-C) RED

A-14 ORG

R-FR BLU

15 D-15 BLU

A-15 RED

16 S3-2 YEL

A-16 GRN

21 TB1-11 BLK

A-21 BLK

23 S2-3 WHT

A-23 VIO

24 S4(E-C) BRN

A-24 GRY

R-FT GRN

25 A-25 WHT

D-25 GRN

26 S3-3 ORG

A-26 BLU

TABLE 10

TB3

Terminal Strip

From To Color

1 TM2-8 Motor Lead

S6-4 YEL

2 TM2-7 Motor Lead

S4(K-8) WHT

3 TM1-7 Motor Lead

S4(J-4) GRY

4 TM1-8 Motor Lead

S6-4 GRN

TABLE 12

TB4

Terminal Strip

From To Color

D-L7 ORG

1 R-FN GRN

L7-1* BRN

T3 BRN

2 L7-2* RED

S3-8* ORG

3 S1-2 BRN

S7-1* BRN

4 R-FG YEL

S7-2* RED

TABLE 13

*Fault Block Accessory Connections

FU-A

Source I – Phase A Fuse

From To Color

1 A-A BRN

TB2-A RED

2 R-A BRN

TABLE 14

FU-B

Source I – Phase B Fuse

From To Color

1 A-B ORG

TB2-B YEL

2 R-B RED

TABLE 15

FU-C

Source I – Phase C Fuse

From To Color

1 A-C GRN

TB2-C BLU

2 R-C ORG

TABLE 16

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Page 38

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

SOURCE I ENERGIZED Lamp

From To Color

1 S6-2 BRN 2 L2-2 ORG

TABLE 25

CONTROL MODE Switch

From To Color

1 S4(L-6) RED 2 S4(M-8) GRN 3 R-4 RED 4 T-2 ORG 5 T-1 RED 6 R-5 BRN

TABLE 23

LAMP TEST Switch

From To Color

1 D-I RED 2 L1-1 BRN 3 R-I BRN/WHT

T-3 ORG

4 TB3-4 GRN

TB3-1 YEL

5 D-11 RED 6 –– 7 D-G BRN 8 SW3-5 BLU 9 ––

10 D-II BRN

11 L2-1 RED

12 R-II GRY

TABLE 24

SOURCE II ENERGIZED Lamp

From To Color

1 R-II GRY 2 L1-2 ORG

T3 YEL

TABLE 26

SWITCH I OPEN Lamp

From To Color

1 R-12 VIO

L4-1 VIO

2 D-L3 BRN

TABLE 27

SWITCH I CLOSED Lamp

From To Color

1 L5-1 VIO

L3-1 VIO

2 D-L4 RED

TABLE 28

FU-X

Source II – Phase X Fuse

From To Color

1 A-X VIO

TB2-X GRY

2 R-X YEL

TABLE 17

FU-Y

Source II – Phase Y Fuse

From To Color

1 A-Y WHT

TB2-Y BLK

2 R-Y GRN

TABLE 18

FU-Z

Source II – Phase Z Fuse

From To Color

1 A-Z BRN/WHT

TB2-Z RED/WHT

2 R-Z BLU

TABLE 19

TM2

ALTERNATE TO PREFERRED TIMER

From To Color

1 TM1–6 BRN 2 TB3-1 BLK 3 TM1-8 RED 4 –– 5 –– 6 TM1-1 ORG

S7-4* ORG 7 TB3-2 BLK 8 TM1-3 YEL

S7-5* YEL

TABLE 21

* Fault Block Accessory Connections

TM1

PREFERRED TO ALTERNATE TIMER From To Color

1 R-33 ORG

TM2-6 ORG 2 TB3-4 BLK 3 R-R YEL

TM2-8 YEL 4 –– 5 ––

R-43 BRN

6 TM2-1 BRN

S7-8* BLU

7 TB3-3 BLK

TB2-3 RED

8 R-L RED

S7-7* GRN

TABLE 20

* Fault Block Accessory Connections

“R”

Relay Tie Board

From To Color

A FU-A-2 BRN B FU-B-2 RED

TB-5-18* BRN C FU-C-2 ORG D S4(B-8) ORG

TB2(G-1) WHT

G T-3 ORG

FB-L* RED J S4(F-12) GRY K S4(D-8) BLU L TM1-3 RED

L1 S1-4 BLU

M S4(D-12) RED

P S4(B-12) YEL

R TM1-6 YEL

R1 S2-4 VIO

W S4(E-2) VIO

X FU-X-2 YEL Y FU-Y-2 GRN

TB5-27* RED

Z FU-Z-2 BLU

FG TB4-4 YEL

FB-G* BRN

FN TB4-1 GRN

FB-N* YEL

S4(A-C) BRN

FP R-FR** BLK

FB-P* GRN

TB1-15 BLU

FR R-FP** BLK

FB-R BLU

S4(C-C) GRN

FS R-FT** BLK

FB-S* VIO

TB1-25 GRN

FT R-FS** BLK

FB-T* GRY

J1 Used with J2 capacitor J3 voltage sensing J4 accessory

I S6-3 BRN/WHT II S6-12 GRY 4 S5-3 RED 5 S5-6 BRN

S3-5 RED

11 TB1-11 BLK

FB-M* ORG 12 L3-1 VIO 22 S3-1 BRN 31 S4(G-6) BLK 32 S4(G-2) WHT 33 TM1-5 ORG 34 S4(J-C) ORG 35 S4(L-C) GRN 41 S4(H-8) BRN/WHT 42 S4(H-12) RED/WHT 43 TM1-2 BRN 44 S4(K-C) YEL 45 S4(M-C) BLU 47 TB1-13 BLK 48 S4(C-6) GRY

TABLE 22

* Fault Block Accessory Connections ** Omit jumpers if fault block included.

Page 39

S260-75-1

SWITCH II OPEN Lamp

From To Color

1 L6-1 VIO

L4-1 VIO

2 D-L5 ORG

TABLE 30

SWITCH II CLOSED Lamp

From To Color

1 L5-1 VIO 2 D-L6 YEL

TABLE 31

MANUAL OPER. SOURCE I Switch

From To Color

1 S3-7 VIO

S4(A-C) BRN

S2-2 RED

2 TB4-3 BRN

S1-5 Bare

3 TB1-13 BLK

S4(B-C) ORG

4 R-L1 BLU

S2-6 YEL 5 S1-2 Bare 6 S2-4 YEL

TABLE 32

T1-T2-T3

LATCHRELAYST ATUS TEST Terminal

From To Color

T1 S4(L-C) RED

S5-5 RED

T2 S4(M-C) BRN

S5-4 ORG L2-2 YEL

T3 S6-4 ORG

TB4-2 BRN

R-G ORG

TABLE 33

SOURCE PREFERENCE & RETURN MODE Switch

From To Color From To Color

A-C R-FP BRN G-4 R-32 WHT

S1-1 BRN G-5 R-31 BLK A-2 R-38 VIO G-6 A-3 H-C S3-5 VIO A-4 S4(G-C) Bare A-5 H-8 R-41 BRN/WHT A-6 H-9

B-C S1-3 ORG H-10

B-8 H-11 R-42 RED/WHT B-9 R-D ORG H-12

B-10 J-C R-34 ORG

B-11 J-2 S4(K-12) Bare

B-12 R-P YEL J-3

C-C R-FS GRN J-4 S4(K-12) Bare

S2-1 YEL TB3-3 GRY C-2 J-5 S4(K-10) Bare C-3 J-6 C-4 K-C R-44 YEL C-5 K-8 TB3-2 WHT C-6 R-48 GRY K-9

D-C S2-3 BLU K-10 S4(J-6) Bare

D-8 R-K BLU K-11 S4(J-2) Bare D-9 K-12

D-10 R-M RED L-C R-35 GRN D-11 L-2 –– D-12 L-3 ––

E-C D-24 GRN L-4

TB1-24 BRN L-5 S5-1 RED

E-2 R-W VIO L-6

F-C D-14 YEL M-C R-45 BLU

TB1-14 RED T-2 BRN

F-12 R-J GRY M-8

G-C S4(H-C) Bare M-9 S5-2 GRN G-2 R-32 WHT M-10 G-3

TABLE 29

SAFETY

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Page 40

REPLACEMENT PARTS

Parts listed and illustrated include only those parts and assemblies usually furnished for repair. Because of the ease, faster receipt, and greater economy of local acquisition, the wiring, wire end terminations, and common hardware parts are not included in the replacement parts listing.

To assure correct receipt of any parts order, always include the control type and serial number. Because of Cooper Power Systems’ continuous improvement policy, there may be instances where parts furnished may not look exactly the same as the parts ordered.

However, they will be completely interchangeable without any rework of the control. All parts carry the same warranty as the original control, i.e., against failure due to defects in material or workmanship within one year from date of shipment.

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

MANUAL OPER. SOURCE II Switch

From To Color

1 S4(C-C) YEL

S3-6 BLU S1-2 RED

2 S2-5 Bare

S3-9 GRN

3 TB1-23 WHT

S4(D-C) BLU

4 R-R1 VIO

S1-6 YEL 5 S2-2 Bare 6 S1-4 YEL

TABLE 34

OPERATION SELECTOR SWITCH

From To Color

1 R-22 BRN 2 TB1-16 YEL 3 TB1-26 ORG 4 ––

R-11 RED 5 S4(H-C) VIO

S6-8 BLU 6 S2-1 BLU 7 S1-1 VIO 8 TB4-2* ORG 9 S2-2 GRN

10 –– 11 –– 12 FB-D* BLK

TABLE 35

“FB”

Fault Block Accessory Tie Board

From To Color

IA TB5-IA BRN IB TB5-IB RED IC TB5-IC ORG IX TB5-IX YEL IY TB5-IY GRN IZ TB5-IZ BLU

G R-FG BRN

D S3-12 BLK IN TB5-IN VIO W ––

U ––

S R-FS VIO

P R-FP GRN

M R-11 ORG

RA(A-2) BLK 17 TB5-17 GRY 28 TB5-28 WHT

V –– T R-FT GRY R R-FR BLU N R-FN YEL

L R-G RED

TABLE 36

FAULT BLOCK OPERATED

From To Color

1 TB4-1 BRN 2 TB4-2 RED

TABLE 37

Fault Block RESET Switch

From To Color

1 TB4-3 BRN 2 TB4-4 RED 4 TM2-6 ORG 5 TM2-8 YEL 7 TM1-8 GRN 8 TM1-6 BLU

TABLE 39

* Fault Block Accessory Connections

“RA”

Fault Block Accessory Relay

From To Color

A1 TB5-17 GRN A2 FB-M BLK A6 TB5-18 BRN A7 A-24 GRY B1 TB5-28 WHT B6 TB5-27 RED B7 A-14 ORG

TABLE 40

“TB5”

Fault Block Accessory

Terminal Block

From To Color

17 FB-17 GRY

RA(A-1) GRN

18 R-B BRN

RA(A-6) BRN IA FB-IA BRN IB FB-IB RED IC FB-IC ORG

FB-IN VIO

BLK

BLK IX FB-IX YEL IY FB-IY GRN

IZ FB-IZ BLU

27 R-Y RED

RA(B-6) RED

28 FB-28 WHT

RA(B-1) WHT

TABLE 38

Page 41

S260-75-1

Figure 28. Front panel – replacement parts identification.

020076KM

Front Panel Replacement Parts List

Index Catalog No. Description Number Qty.

1 Lamp socket KP2361A1 6 2 Socket fastener KP2005A10 6 3 Lamp KP2276A3 6 4 Lens, red (L4, L6) KP2277A2 2 5 Lens, green (L3, L5) KP2277A5 2 6 Lens, clear (L1, L2) KP2277A3 2 7 Lens, amber (L7) KP2277A4 1 8 Terminal post, black (T1, T2) KP2081A2 2

9 Terminal post, white (T3) KP2081A1 1 10 Toggle switch, 4PST (S6) KP2124A26 1 11 Digital timer

(TM1, TM2)

0.01 sec. to 99.9 hrs. range KP2159A2 2

Index Catalog No. Description Number Qty.

12 Diode circuit board assembly KCN120SA 1 13 Toggle switch, 4PDT (S3) KP2124A16 1 14 Toggle switch, DPDT (S1, S2) KP2124A6 2 15 Intermediate terminal strip

(TB3, TB4) KP432ME 2

16 Rotary selector switch (S4) KCN199S 1 17 Switch knob KCN149S1 1 18 Knob lock KP107RS 1 19 Lock backing KP497ME 1 20 Self tapping screw,

6-32 x 1/2, stl K751515106050A 2

21 Spacer KP3004A59 1 22 Toggle switch, DPDT (35) KP2124A21 1 23 Toggle switch, 3PST (S7) KP2124A43 1

1, 2, 3, 5 1, 2, 3, 4 8 10 8 1, 2, 3, 5 1, 2, 3, 4

1, 2, 3, 6

1, 2, 3, 7 22

20, 21

12 11

1, 2, 3, 6

16, 17

18, 19, 20

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Page 42

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

4, 6 2, 6 2, 6 7

2, 6

3, 6

Figure 29. Back panel – replacement parts identification.

020080KM

Back Panel Replacement Parts List

Index Catalog No. Description Number Qty.

1 Relay (R1) KP978ME 1 2 Relay (R8, R9, R10, R11) KP978ME 6 3 Relay (R4, R5) KP978ME 2 4 Relay (R2, R6, R7) KP978ME 1 5 Relay retainer K999904310339A 1 6 Relay retainer K999904310339A 9 7 Relay tie board subassembly KCN203S900 1 8 Surge protector board assembly KCN125SA 1 9 Terminal block (TB2) (Consists

of the following components)

Terminal section KP999904150097A 12 End piece KP999904150064A 1 Marker strip KP2076A50 1

10 Terminal block (TB1) (Consists

of the following components)

Terminal section KP999904150097A 16 End piece KP999904150064A 1

Marker strip KP2076A50 1 11 Fuse holder KP124S 6 12 Fuse KP125S 6

2, 6

4, 6

1, 5

9 10

11, 12

Page 43

S260-75-1

Fault Block Accessory Replacement Parts List

Index Catalog No. Description Number Qty.

1 Relay retainer bar KCN144S1 1 2 Circuit board retainer bar KCN141S1 1 3 Wing nut, 10-32, stl K881215332010Z 1 4 Elastic stop nut KP2020A1 1 5 Phase actuating current circuit KCN116S___ 1

board (add proper current value to complete catalog number: 80, 112, 160, 224, 320, 448, 640)

6 Ground actuating KCN142S___ 1

current resistor (add proper current value to complete catalog number: 10, 14, 20, 28, 40, 56, 80, 112,

160, 224, 320, 448) 7 Diode board KCN114SA 1 8 Trip-reset board KCN112SA 1 9 Relay (RY1) KP978ME 1

10 Time-delay relay (RY2) K999904310339A 1

11 Transformer KA234ME 1 12 Zener diode KP4011A12 1 13 Tie board KCN110SA 1 14 Terminal block (TB5) 1

(Consists of the following components) Terminal section KP999904150097A 16 End piece KP999904150064A 1 Marker strip KP2076A50 1

15 Barrier KCN167S1 1

Figure 30. Fault block accessory – replacement parts identification.

020081KM

12 13 11 6 4 5

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Page 44

Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions

KA2048-291 Rev: 02

KDL

10/02

P.O. Box 1640 Waukesha, WI 53187 www.cooperpower.com

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FOR LIFE