Generac Power Systems PowerPact G0065201 Installation Manuallines page 35

Check Manual Transfer Switch
Operation
Refer to the "Manual Transfer Operation" section of the
Owner's Manual for procedures.
DANGER
Electrocution. Do not manually transfer under load.
Disconnect transfer switch from all power sources
prior to manual transfer. Failure to do so will result
in death or serious injury, and equipment damage.
Electrical Checks
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
Complete electrical checks as follows:
1. Verify that generator is OFF.
2. Set the generator main circuit breaker to OFF or
OPEN.
3. Turn OFF all circuit breakers/electrical loads that
will be supplied by the generator.
4. Turn on the utility power supply to the transfer
switch using the means provided (such as a utility
main line circuit breaker).
5. Use an accurate AC voltmeter to check utility
power source voltage across transfer switch
terminals N1 and N2. Nominal line-to-line voltage
should be 220 volts AC. If voltage is not correct,
verify AC output and wiring from utility source to N1
and N2 lugs at transfer switch.
6. Check utility power
terminals N1 and the transfer switch neutral lug;
then across terminal N2 and neutral. Nominal line-
to-neutral voltage should be 110 volts AC (if wired
with a neutral). If voltage is not correct, verify AC
output and wiring from utility source to N1 and N2
lugs at transfer switch.
7. When certain that utility supply voltage is
compatible with transfer switch and load circuit
ratings, turn OFF the utility power supply to the
transfer switch.
8. On the generator panel, push the MANUAL button.
The engine should crank and start.
9. Let the engine warm up for about five minutes to
allow internal temperatures to stabilize. Then, set
the generator main circuit breaker to ON or
CLOSED.
Installation Guidelines for 50 Hz PowerPact™
(000132)
(000129)
source voltage across
10. Connect an accurate AC voltmeter and a
frequency meter across transfer switch terminal
lugs E1 and E2. At no load, voltage should be 216–
220 at a frequency of 52–53 Hz. If voltage is not
correct, verify that the MLCB is closed and verify
AC output and frequency (Hertz or Hz) at the
MLCB. Also verify wiring from generator to E1 and
E2 lugs at transfer switch.
11. Connect the AC voltmeter test leads across
terminal lugs E1 and neutral; then across E2 and
neutral (if wired with a neutral). In both cases,
voltage reading should be 108–110 volts AC. If
voltage is not correct, verify that the MLCB is
closed and verify AC output between the E1 and
E2 of the MLCB and Neutral at the generator.
12. Verify wiring from generator to E1, E2 and Neutral
lugs at transfer switch.
13. Set the generator main circuit breaker to OFF or
OPEN.
14. Push the generator OFF button. The engine should
shut down.
NOTE: It is important not to proceed until certain that
generator AC voltage and frequency are correct and
within the stated limits.
Control Panel/Start-up/Testing
31