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INSTALLATION (continued)
1--5
Transfer Switch
Connected
To
Normal
Transfer Switch
Connected
To
Emergency
Normal
Source
Accepted
Emergency
Source
Accepted
Transfer
Control
Retransfer
Delay
Bypass
Transfer
Test
HOLDFOR
15SECONDS
RED
RED
GREEN
GREEN
(
)
Automatic Transfer
& Bypass–Isolation Switch
observe
these lights
Figure 1-8. Standard controls and indicators.
Functional Test
Read all instructions on the Wiring Diagrams and labels
affixed to the ATB. Note the control features that are
provided and review their operation before proceeding.
After installing the ATB check the following:
S Bypass Handle should be in the BYPASS POS
position (closed on normal)
S Isolation contacts should be in the TEST position
(see pages 1-3 and 1-4).
S Automatic Transfer Switch should be in the N
(normal) position
If handles are not in correct positions, follow instructions
for Bypassing and Isolating the automatic transfer switch
in Section 3. Do not force the handles. Electrical
interlocks prevent a wrong sequence of operation.
1–VoltageChecks
First check nameplate on transfer switch; rated voltage
mustbethesameasnormalandemergencylinevoltages.
Useextremecautionwhenusingameterto
measure voltages. Do not touch power termi-
nals; shock, burns, or death could result !
Perform steps 1–6 at the right. Observe the status lights.
See Figures 1–8 and 1–11.
■ Black square means light is on.
❐ White s quare means light is off.
* If necessary, adjust voltage regulator on generator per the
manufacturer’s recommendations. The ATB will respond only to
rated voltage specified on the nameplate.
Now continue to 2–ManualOperationTest, next page.
1
Close the normal source circuit
breaker. The Transfer Switch
Connected To Normal and the
Normal S ource Accepted lights
should come on .
2
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres-
entatthetransferswitchnormal
source terminals.
3
Close the emergency source
circuit breaker. (Start generator,
if necessary.) The Transfer
Switch Connected To No rmal &
Emergency Source Accepted
lights should come on .
4
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres-
ent a t the transfer switch emer-
gency source terminals.*
5
Useaphaserotationmeterto
check phase rotation of emer-
gency source; it must be the
same
as the normal source.
A
B
C
6
Shut down the engine–genera-
tor, if applicable. The Emergen-
cy Source Accepted light should
go off. Then put the starting
control selector switch (on the
generator set) in the automatic
position. Close e nclosure door.