Installation Manual Installation
6 381333-415 B
Figure 3. 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:
– Bypass Handle should be in the OPEN position.
– Isolation Handle should be in the CLOSED
position.
– Transfer switch should be in NORMAL position.
(For ACTB and ADTB the CN transfer switch
should be CLOSED and the CE transfer switch
should be OPEN).
If handles are not in correct positions, follow
instructions for Bypassing and Isolating the automatic
transfer switch (pages 10-12). Do not force the
handles. Electrical interlocks prevent a wrong
sequence of operation.
1 – Voltage Checks
First check nameplate on transfer switch; rated
voltage must be the same as normal and
emergency line voltage.
Use extreme caution when using a meter to
measure voltages. Do not touch power
terminals; shock, burns, or death could result!
Perform steps 1–6 at the right. Observe the
status lights. See Figure 3.
■ Black square means light is on.
□ White square 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 – Electrical Operation.
1 Close the normal source circuit
breaker. The Transfer Switch
Connected To Normal and the
Normal Source Accepted lights
should come on.
2 Use an accurate voltmeter to
check phase to phase and phase
to neutral voltages present at the
transfer switch normal source
terminals.
3 Close the emergency source
circuit breaker. Turn the Engine
Control switch to Run to start
the generator. The Transfer
Switch Connected To Normal &
Emergency Source Accepted
lights should come on.
4 Use an accurate voltmeter to
check phase to phase and phase
to neutral voltages present at the
transfer switch emergency
source terminals.*
5 Use a phase rotation meter to
check phase rotation of
emergency source; it must be
the same as the normal source.
6 Turn Engine Control switch to
Auto to stop the generator. The
Emergency Source Accepted
light should go off. Then put the
starting control selector switch
(on generator set) in automatic
position. Close enclosure door.
2 – Electrical Operation
This procedure checks electrical operation of the
ATS.
Be sure to close the enclosure doors before
proceeding to prevent person injury in case of
electrical system fault.
Transfer Test
The ATS should be bypassed and isolated. Follow
instructions for Bypassing and Isolating the automatic
transfer switch (pages 10-12). Both normal and
emergency sources must be available and the
emergency source generator (if used) must be
capable of being started; put engine starting control in
automatic position. The Transfer Switch Connected
to Normal light and the Normal Source Accepted light
should be on.
observe
these
lights
A
B
C
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