Installation Operator’s Manual
381333-194 B 7
Installation
Figure 2. Standard controls and indicators.
Functional Test
Read all instructions on the Wiring Diagrams and labels
affixed to the 7ACTB. Note the control features that are
provided and review their operation before proceeding.
After installing the 7ACTB check the following:
– Bypass Handle should be in the NORMAL position.
– Isolation Handle should be in the CONN position.
– CN transfer switch should be C (closed)
– CE transfer switch should be O (open)
If handles are not in correct positions, follow instructions for
Bypassing and Isolating the automatic transfer switch on
pages 12-18. 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 voltages.
Use extreme caution when using a meter to
measure voltages. Do not touch power terminals;
shock, burns, or death could result!
Perform steps 1 through 6 at the right. Observe the status
lights. See Figure 2
■ 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 ACTB will respond
only to rated voltage specified on the nameplate.
Now continue to 2 – Electrical Operation on next page.
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 the 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 the generator
set) in the automatic position.
Close the enclosure door.
observe
these lights
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