GE 70R-1000D User Manual
70R-1000D
11/04
ZTG/ZTGD Series Transfer Switches
40-3000 Amps
GE Zenith Controls
Operation and Maintenance Manual
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Equipment Inspection and Storage . . . . . . . . .13
Final Equipment Inspection . . . . . . . . . . . . . . .13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Power Connections . . . . . . . . . . . . . . . . . . . . . .14
Engine Start Control Connections . . . . . . . .14-6
Initial Energization . . . . . . . . . . . . . . . . . . . .16-7
MX150 Microprocessor Controller . . . . . . . . . . . . .18
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
LCD & Keypad . . . . . . . . . . . . . . . . . . . . . . . . . .19
User Setting for Voltage & Frequency . . . . . .110
Standard Features, MSTDG Option Pkg. . .10-11
Standard Features, MEXEG Option Pkg. . . . .12
Optional Accessories . . . . . . . . . . . . . . . . . . . . .13
How to Set the System Clock . . . . . . . . . . . . . .14
CDT One Event Timer Exerciser . . . . . . . .14-15
CDP Clock Exerciser . . . . . . . . . . . . . . . . . . . . .16
User Setup - CFG Menu . . . . . . . . . . . . . . . . . .17
User Setup - SET Menu . . . . . . . . . . . . . . . . . .18
User Setup - System Info . . . . . . . . . . . . . . . . . .19
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
Standard Transition . . . . . . . . . . . . . . . . . . . . .120
Delayed Transition . . . . . . . . . . . . . . . . . . . . . .20
Page
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . .21
Standard Transition . . . . . . . . . . . . . . . . . . . . .121
Delayed Transition . . . . . . . . . . . . . . . . . . . . . .21
Controls Power Supply (CPS) . . . . . . . . . . . . . . . . .22
Schematics, Standard & Delay . . . . . . . . . . . .123
Troubleshooting & Diagnostics . . . . . . . . . . . . . . . .24
Maintenance and Testing . . . . . . . . . . . . . . . . . . . . .25
Inspection and Cleaning . . . . . . . . . . . . . . . . .25
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Power Panel & Replacement Parts . . . . . . . . . . . . .26
Standard Transition . . . . . . . . . . . . . . . . . . . . . .26
40-260 Amps . . . . . . . . . . . . . . . . . . . . . . . . . . .26
400-600 Amps . . . . . . . . . . . . . . . . . . . . . . . . . .27
800-1200 Amps . . . . . . . . . . . . . . . . . . . . . . . . .28
1600-3000 Amps . . . . . . . . . . . . . . . . . . . . . . . .29
Delayed Transition . . . . . . . . . . . . . . . . . . . . . .30
40-600 Amps . . . . . . . . . . . . . . . . . . . . . . . . . . .30
800-1200 Amps . . . . . . . . . . . . . . . . . . . . . . . . .31
1600-3000 Amps . . . . . . . . . . . . . . . . . . . . . . . .32
Table of Contents
Introduction
GE Zenith Transfer Switches are used to provide a continuous source of power for lighting and other critical loads by automatically transferring from source 1 power to source 2 power in the event that source 1 voltage falls below preset limits.
Voltage sensing and system control is performed via a state-of-the-art microcontroller located on the cabinet door.
It is designed to give highly accurate control of the transfer switch system.
All GE Zenith transfer switches are designed for use on emergency or standby systems, and are rated for total system or
motor loads. Transfer switches are UL Listed under Standard 1008 and CSA Certified under Standard C22.2 No. 178 and
IEC Listed under Standard 947.
NOTES: A protective device such as a molded case circuit breaker or fused
disconnect switch MUST
be installed on both sources of incoming
power for circuit protection and as a disconnection device.
All references made within this manual about the term “S1” or
“Source 1” relate to a Normal Power Source. All references made
about the term “S2” or “Source 2” relate to an Emergency
or Alternative Power Source.
Authorized Service
For GE Zenith parts and service, call: (773) 299-6600
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Each GE Zenith transfer switch is factory wired and
tested. A complete information package is furnished
with each switch which includes:
a. Sequence of operation.
b. Description and operation of
all accessories supplied.
c. Power panel connection diagram
and schematic.
d. Description and identification of
all customer field connections.
Installation of GE Zenith transfer switches includes:
a. Mounting the transfer switch cabinet.
b. Connection of Source 1, Source 2,
and Load cables or bus bars.
c. Connection of external control
circuits as required.
Mounting
Adequate lifting means must be used to mount the
transfer switch into place. The recommended method for
moving the transfer switch using the lifting eyes, where
supplied, and a spreader bar is illustrated in Figure 1.
Enough room should be allowed to open the cabinet
doors fully for inspection and servicing of the switch per
NEC and local codes.
Safety / Installation
DANGER
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
The safe operation of your switch is GE
Zenith’s focus.
The proper storage, installation, operation and maintenance will help increase the life of the switch.
Equipment Inspection
and Storage
Once you have received the transfer switch, inspect
it for any damage. This includes damage to the
enclosure, power panel, control panel and wiring
harness. If any damage is found or suspected, file a claim
as soon as possible with the carrier and notify the nearest
GE
Zenith representative.
Before installation, if it is necessary, store the transfer
switch in a clean dry place, protected from dirt and
water. Provide ample air circulation and heat, if necessary, to prevent condensation.
5% to 95%
(non-condensing)
-30°C to
+75°C
(-22°F to
+167°F)
40-400
AMP
(molded shell)
-20°C to +65°C
(-4°F to +149°F)
40-4000
AMP
(all other frame
and panel types)
-20°C to +60°C
(-4°F to +140°F)
Operating
Storage Temperature
Temperature (Ambient): Humidity
CAUTION
Due to hazardous voltage and current, GE Zenith rec-
ommends that a
GE Zenith Certified technician or a
qualified electrician must perform the
installation and maintenance of the switch.
Final Equipment Inspection
Prior to energizing the transfer switch:
1. Remove any debris incurred, with a vacuum, due
to shipment or installation.
WARNING
Do not use a blower since debris may
become lodged in the electrical and
mechanical components and cause damage.
2. Verify that all cabled connections are
correct and that phase rotation of both sources
match.
3. Check engine start connections.
4. Verify the correct connection of all
control wires.
5. Check settings of all timers and adjust
as necessary.
6. Adjust any optional accessories as required.
7. Check the lug torque values of the power
connections.
NOTE
: Lug torque values are specified
in table 2 on pg.4.
8. Make sure that all covers and barriers are
installed and properly fastened.
NOTE
: Power panels ship from GE Zenith
in Source 1 Position.
CAUTION
Before drilling conduit entry holes or any
accessory mounting holes, cover and protect
the switch and control panel to prevent dirt
and metal fragments from entering the
mechanical and electrical components.
Failure to do so may result in
damage and malfunction of the switch.
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Table 2
Tightening Torque for Lugs
Socket Size
Across Flats
Torque
Lb. - In.
Lb. - Ft.
45
1/8
4
100
5/32
8
120
3/16
10
150
7/32
12
200
1/4
17
275
5/16
23
375
3/8
31
500
1/2
42
600
9/16
50
Installation (cont’d)
D
CABINET
LIFTING EYES
SPREADER BAR
H
45°
Figure 1
Power Connections
GE Zenith transfer switches are supplied with UL listed
solderless screw type terminals as standard for the
Source 1, Source 2 and Load power connections.
Table 1 lists the number and sizes of cable lugs supplied
as standard for each switch amp rating.
Connect the Source 1, Source 2, and Load conductors
to the clearly marked terminals on the transfer switch.
Remove surface oxides from cables by cleaning with a
wire brush. Verify that all connections are correct before
tightening the lugs. All cable lug connections must be
tightened to the proper torque values as shown in
Table 2.
NOTE
: Do not run cables or wiring behind
front-connected transfer switches.
DANGER
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
Table 1
Power Connections: Screw Type Terminals for External Power Connections
Switch Size
(Amps)
40
80
100
150
200, 225
400
600
800, 1000, 1200
Source 1, Source 2 & Load Terminals
1 #8 to 3/0 AWG
Cable Per Pole Range of Wire Sizes
1 #8 to 3/0 AWG
1 #8 to 3/0 AWG
1 #8 to 3/0 AWG
1 #6 AWG to 250 MCM
1 #4 AWG to 600 MCM
2 #2 AWG to 600 MCM
4 #2 AWG to 600 MCM
Neutral Bar (When Required)
3 #14 to 1/0 AWG
No. of Cables Range of Wire Sizes
3 #14 to 1/0 AWG
3 #14 to 1/0 AWG
3 #6 AWG to 350 MCM
3 #6 AWG to 350 MCM
4 #4 AWG to 600 MCM
260
1 #6 AWG to 350 MCM 3 #6 AWG to 350 MCM
8 #4 AWG to 600 MCM
12 #4 AWG to 600 MCM
1600, 2000
2600, 3000
8 #2 AWG to 600 MCM
24
#4 AWG to 600 MCM
Engine Start
Control Connections
Engine-start control wires connect to control terminals
beside the MX150. Engine start terminals are indicated by
a schematic symbol (the symbol indicates the contact
state for a de-energized normal source). Figure 3 shows
the engine-start contacts.
Make all other necessary control connections to the control panel terminal blocks per the schematics supplied
with the ATS.
NOTE: All control wires (18-12 AWG) must be
torqued to 19 in/lbs.
NOTE
: When lifting the switch using a spreader bar,
height H must be equal to half of distance D.
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Installation (cont’d)
A complete information package is furnished with
each transfer switch including a complete connection
diagram and schematic which details all necessary
control circuit field connections.
The engine start control wires connect to the
engine start relay terminals located to the left
of the microprocessor. Figure 2 shows the location
of these terminals.
DANGER
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
To R/T Box
To Power
Panel
Input/Output
Connectors
to I/O Modules
Engine Start
Connections
Clock Program
Backup Battery
Remove protective
strip to enable clock
functions
Network Connector
Control Connections
The terminals are clearly identified by a label on the
microcontroller backplate. In the case of manual transfer switches, or in other applications not requiring the
microprocessor, clearly marked terminal blocks are
provided in the upper left corner of the control panel
for the engine start control wires.
Figure 2
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Installation (cont’d)
Engine Start
Control Connections
The engine-start terminals are clearly identified by a
label on the microcontroller backplate. In the case of
manual transfer switches, or in other applications not
requiring the microprocessor, clearly marked terminal
blocks are provided in the upper left corner of the control panel for the engine start control wires.
Terminals for field connections to the A3 Source 2
auxiliary contacts and the A4 Source 1 auxiliary contacts
are also provided. These terminals are clearly marked
and appear on the side of the power panel. On 400
amp metal frame units these terminals appear on the
bracket above the operator handle.
Initial Energization
Before proceeding, refer to the information package
supplied with the ATS and read and understand the
information on all accessories provided.
1. Unlock the enclosure.
2. Open the enclosure.
3. Verify the correct system voltage.
NOTE: The equipment rating nameplate on
the transfer switch lists the voltage.
See Figure 4.
4. Close Source 1 circuit. breaker.
NOTE:The controller will illuminate Source 1
Available LED if proper voltage
is sensed.
5. Verify the phase to phase voltages at the Normal
line terminals.
6. Close the Source 2 circuit breaker.
7. Start the generator engine.
DANGER
HAZARDOUS VOLTAGE
(Can Cause Severe Injury or Death)
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.
NOTE: The controller will illuminate Source 2
Available LED when preset voltage
and frequency levels are reached.
8. Verify the phase to phase voltages at Source 1
line terminals.
9. Verify that the phase rotation of Source 1
is the same as the phase rotation of
Source 2.
10. Shut down the generator engine.
11. Place the starting control in the Automatic position.
12. Complete the visual inspection of the transfer switch.
13. Close the enclosure.
14. Lock the enclosure.
CAUTIONS
Certain accessories, per specific
schematics, can inhibit automatic transfer.
Engine Gen-Set could start when
engine control wires are attached.
Figure 4
SERIAL NUMBER:
RA
TING: VOLTS -
AMPS -
SYSTEM VOLTS:
MODEL NUMBER:
HZ -
PHASE -
GE Zenith Controls
E
Figure 3
4
5
6
1
2
(Engine Start)
3
P Relay
Contact rating is
10 Ampere at 120VAC
or 28VDC Gold plated
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Installation (cont’d)
5. Close the External (up-stream) Source 2 line
circuit breaker.
6. Start the engine generator in
MANUAL mode.
NOTE: When the voltage and frequency
reach preset values, the Source 2
Available
LED will illuminate.
7. Verify the phase to phase voltages at Source 2
line terminals.
8. Verify that the phase rotation of
Source 2 is the same as the phase
rotation of Source 1.
9. Shut down the generator's engine.
(Place in Automatic Mode.)
NOTE: Source 2 Available LED
will turn off.
NOTE: The engine generator will continue
to run for the duration of Source 2
Stop Delay Timer.
10. Place the disconnect switch to ENABLE.
11. Complete the visual inspection of the
transfer switch.
12. Close the enclosure.
13. Lock the enclosure.
MX150
Figure 5 – LCD and keypad
Initial Energization (cont’d)
After all options and accessories are checked and verified, follow these steps to set up the ATS. Refer to MX150
display Figure 5. The annunciation LEDs illuminate to
indicate (1) source availability, (2) ATS position, and (3)
MX150 control function (timing).
1. Unlock the enclosure.
2. Open the enclosure.
3. Place the Disconnect Switch in the Inhibit.
NOTE
: This step is only performed if the
“DS” Option was purchased.
4. Close the external (up-stream) Source 1
circuit breaker.
NOTES: Source 1 Available and Source 1
Position LED’s will illuminate.
If Source 1 Available
LED does not
illuminate, verify that Source 1 Voltage
is above the preset restore value.
The Gen-Set will start and run while
Source 2 stop Delay Timer is timing.
WARNING
When performing a hi-pot or
dielectric test on the power section,
DISCONNECT the control panel plugs from
the microprocessor to avoid potential damage.
S1 OK
21:56
MON 23 APR 2002
MORE TEST
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
MX150 Microprocessor Controller
MX150 Controller
Consists of two major assemblies:
I. The Microprocessor contains the following:
A. MX150 Board - Customer Input and Output
(I/O) for system interface. Located on the left
hand side of the back of the unit (see figure 6)
1. I/O accessories that can be found here are:
a. Engine start relay P output
b. Pre-Signal to transfer T3, W3 and
UMD output (optional)
c. Transfer Inhibit Q3 and Q7 input
(optional)
d. Remote test Q2 input (optional)
e. Network interface ZNET
input/output (optional)
B. LCD and Keypad located on the exterior
of the door (see figure 7)
1. User accessibility to the following:
a. LED indication of source
availability
b. LED indication of transfer
switch position
c. LCD screen indicates:
(1) timer count down (numeric)
(2) event reporting (text)
d. Keypad provides user interface to:
[in conjunction with LCD screen]
(1) Setting sensors and timers
(2) Configuring logic accessories
II. The Controls Power Supply (CPS)
Contains transformers which drop line voltage to
control level for controller input and SCR inputs
(see figure 6).
Figure 7
Figure 6
I/O Interface
CPS
Engine Start Relay P
Battery Strip
and
Access
Code Label
MX150
Board
MX150
S1 OK
21:56
MON 23 APR 2002
MORE TEST
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
MX150 Microprocessor Controller (cont’d)
Figure 8
LCD & Keypad
These options are accessible through the LCD and
keypad (see figure below). To become familiar with the
options loaded into a particular unit, scrolling through
the SET and CFG menu will show the descriptions of
the options (see pages 17). These menus are the very
same menus that are used to access the setting and/or
configuration of these options. The SET (setting) menu
is primarily used to show or change, time and voltage
settings. The CFG menu is primarily used to turn an
option on or off. When scrolling through these menus,
no changes can be made without entry of the access code.
The factory set six-digit access code is located on a white
label on the back of the unit (see figure 9 pgs. 17-19).
The MX150 has many logic options. Each controller is
downloaded with options at the time of manufacture.
The collection of options that any one controller has is
specified at the time of order placement. The following
pages include all the options that can reside in the
controller. Not all units include all options.
Source 1 LED (Green)
indicates Source 1 is
acceptable for use
Source 1 Position LED (Green)
indicates Power Panel (ATS)
is closed to Source 1 position
Source 2 Position
LED (Red) indicates
Power Panel (ATS)
is closed to
Source 2 position
Source 2 (Red)
indicates Source 2
is acceptable for use
LCD Screen
Current Time,
Day and
Date of Display
#1 or the word
on the LCD above the key.
The word above the key
changes depending on which
screen is being displayed.
S1 OK
01: 50
FRI 31 MAY 2003
MORE CFG TEST SET
MORE Menu
CFG Menu
TEST Menu
MX150
#2 or the word
on the LCD above the key.
The word above the key
changes depending on which
screen is being displayed.
Exercise Event
"Impending"
* E *
SET Menu
Keypad
#4 or the word
on the LCD above the key.
The word above the key
changes depending on which
screen is being displayed.
#3 or the word
on the LCD above the key.
The word above the key
changes depending on which
screen is being displayed.
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
User Setting for Voltage & Frequency
Standard Features, MSTDG Option Pkg.
Source 1
Voltage "Restore"
Factory Default: 90%
This adjustment determines the minimum acceptable
voltage required to transfer to Source 1.
Adjust via the SET menu. Range is 85% to 100% in
1% increments (see page 18).
Once satisfied, the T timer will begin timing
to transfer to Source 1.
Voltage "Fail"
Factory Default: 80%
This adjustment determines the low voltage threshold.
Adjust via the SET menu. Range is 75% to 98% in 1%
increments (see page 18).
"Fail" must be a minimum of 2 % below "Restore"
setting. Once voltage falls below threshold, P timer
begins timing to signal Source 2 Generator to start.
Source 2
Voltage "Restore"
Factory Default: 90%
This adjustment determines the minimum acceptable
voltage required to transfer to Source 2.
Adjust via the SET menu. Range is 85% to 100% in
1% increments (see page 18).
Once satisfied, the W timer will begin timing
to transfer to Source 2.
Voltage "Fail"
Factory Default: 80%
This adjustment determines the low voltage threshold.
Adjust via the SET menu. Range is 75% to 98% in 1%
increments (see page 18).
"Fail" must be a minimum of 2 % below "Restore"
setting. Once voltage falls below threshold, T timer
will be bypassed to expedite the transfer to Source 1.
Frequency "Restore"
Factory Default: 95%
This adjustment determines the minimum acceptable
frequency required to transfer to Source 2.
Adjust via the SET menu. Range is 90% to 100% in
1% increments (see page 18).
Once satisfied, the W timer will begin timing
to transfer to Source 2.
Frequency "Fail"
Factory Default: 90%
This adjustment determines the low frequency threshold.
Adjust via the SET menu. Range is 88% to 98% in
1% increments (see page 18).
"Fail" must be a minimum of 2 % below "Restore" setting.
Once satisfied, the W timer will begin timing to transfer
to Source 2.
6
Test Switch, Momentary
A3
Auxiliary Contact: Closed when the switch is in Source 2
position.
A4
Auxiliary Contact: Closed when the switch is in Source 1
position.
Calibrate
While monitoring the actual Phase to Phase voltage levels and Frequency with a calibrated test equipment, the
Phase to Phase voltage sensing and Frequency can be
adjusted accordingly. Calibration capabilities are available
for Frequency and AB, BC, CA Phase to Phase voltage for
both Sources. Adjust via SET menu (see page 18)
CDT
Load or NO-Load. One event exerciser with adjustable
Engine exercise timer. Exercise duration can be set
between 5 and 60 minutes in 1 minute increments. Can
be configured to run every 1, 7, 14, or 28 days. Factory
Default is 20minutes. When exerciser is impending,
(*E*) appears in the upper right hand corner of LCD
screen. See page 14-15 for instructions. Configured via
CFG (see page 17). Set via SET menu (see page 18).
DS
Disconnect Switch, Auto/Inhibit.
Inhibits transfer in either direction when in inhibit.
Allows automatic operation when in Auto.
(800-4000 Amp units)
DT (Delayed Transition Only)
Time Delay from Neutral Switch position to Source 1
position. Adjustable 0-10 minutes in 1 second increments. Standard setting is 5 seconds Adjust via SET
menu (see page 18)
DW (Delayed Transition Only)
Time Delay from Neutral Switch position to Source 2
position. Adjustable 0-10 minutes in 1 second increments. Standard setting is 5 seconds.Adjust via SET
menu (see page 18)
E
Engine Start Contact
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ZTG/ZTGD Operation and Maintenance Manual (70R-1000D)
Std. Features, MSTDG Option Pkg. (cont’d)
EL/P
Event Log: Sequentially Numbered Log
of 16 events that track
date, time, reason and action taken
System Data: Total Life Transfers (N2P)
Days Powered Up
Total Transfers to S2
Total S1 Failures
Time S1 available in Hrs
Time S2 available in Hrs. (N1P)
K/P
Frequency Indication for S1 and S2
L
LNP Center-off position LCD-Indicator
Indicating LED lights:
L1 Indicates Switch in Source 2 position.
L2 Indicates Switch in Source 1 position.
L3 Indicates Source 1 available.
L4 Indicates Source 2 available.
P1
Time Delay Source 2 Start. Adjustable 0-10 seconds.
Standard setting is 3 seconds.
Adjust via SET menu (see page 18)
Q2
Peak Shave / Remote Load Test: Input for Peak Shave
or Remote Load Test. Includes automatic return to
Source 1 if Source 2 fails and Source 1 present.
R2E
Under voltage sensing of Source 2 for single-phase.
(R17 replaces R2E for Utility to Utility switches)
R50
In Phase Monitor this feature restricts Live to Live
Source Transfers to occur unless both Sources are within
7 electrical degrees or less of each other. (live Source to
live Source transfers usually occur during transfer back
to Source 1 or during Testing). R50 does not change
the operation of the Automatic Transfer Switch in a
power failure mode. After all timer functions have
elapsed, the CHECKING FOR SOURCE SYNCHRO-
NISM will be displayed as well as the direction of
transfer (S1-S2 for example denotes transfer from
Source 1 to Source2). When synchronism is accomplished,
transfer will take place.
Notes: - If S2 Frequency is less than S1 Frequency,
display will show a series of (- - - - -…..) symbols.
- If S2 Frequency is greater than S1 Frequency,
display will show a series of (+++++…..) symbols.
- Each (-) or (+) symbol represents 10 electrical
degrees out of phase. A maximum of 18 symbols
(180 electrical degrees) can be monitored.
- The number of (-) or (+) symbols decrease
as the two sources approach synchronism
and increase as the two sources drift out
of synchronism.
- If S1 and S2 Frequencies are identical, the
display will show a series of alternating
- - - -
symbols (++++…) which also indicate the
approximate out of phase degrees
In the event that the Sources do not come within 7
electrical degrees of each other within 60 seconds, the
unit will display the message: SYNCH CHECKING and
will allow the user to BYPASS. If the BYPASS button is
pressed, the unit will display the message: WARNING
MAY CAUSE DAMAGE TO THE LOAD. Pressing XFR
will actually bypass the R50. Since R50 is a passive device,
the length of time it takes to reach Synchronism is dependent on the frequency difference between the two
Sources. Source 1 is usually a Utility and the frequency
is not within the control of the consumer. Source 2
needs to be adjusted to create an adequate difference
in order for the transfer to happen a timely fashion.
Note: For optimum performance, Source 2
Generator should be adjusted a Maximum of
2 Hertz above or below the Utility frequency,
minimum of 0.1 Hertz. (58 to 59.9) or
(60.1 to 62) Hertz. Adjustment of Generator
to 60Hertz could cause lengthy transfer delay
.
R50 Feature can be turned ON or OFF via CFG Menu
(see page 17). Factory Default if OFF.
S13
Transfer Commit. Configured via CFG menu.
(see page 17) When this Feature is set to OFF:
The transfer Switch is not committed to transfer unless
the outage duration is longer than the timers that
precede the transfer to Source 2 position. This assumes
that the outage will be an isolated event. When this
Feature is set to ON: The transfer Switch is committed
to transfer to Source 2 position once the W timer has
begun timing, even if Source 1 power returns before
the transfer to Source 2. This is to ensure that the
transfer takes place, because one outage may be
followed by another.
T
Time Delay (S1) Source 1 Stable Timer. To delay transfer to Source 1 (immediate retransfer on Source 2 failure). Adjustable 0-60 minutes in 1 second increments.
Standard setting is 30 minutes. Adjust via SET menu
(see page 18)
U
(S2) Source 2 Stop Delay Timer. Allows Engine to run
unloaded after switch retransfer to Source 1. Adjustable
0-60 minutes in 1 second increments. Standard setting is
5 minutes. Adjust via SET menu (see page 18)
W
Time Delay (S2) Source 2 Stable Timer. To delay transfer to Source 2. Adjustable 0-5 minutes in 1 second
increments. Standard setting is 1 second. Adjust via SET
menu (see page 18)
YEN
Bypass Timers Key utilizing Keypad. When applicable,
the system prompts the user to press a button to bypass
(T) or (W) Timers should the user so desires.
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