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Operation
3.4
GENERATOR TESTS UNDER
LOAD
1.
Set the generator's main circuit breaker to its OFF or OPEN
position.
2.
Set the UTILITY SERVICE DISCONNECT circuit breaker to the
OFF position.
3.
Manually actuate the transfer switch main contacts to
their GENERATOR (STANDBY) position. Refer to "Manual
Operation".
4.
To start the generator, set the AUTO/OFF/ MANUAL switch to
MANUAL. When engine starts, let it stabilize for a few min-
utes.
5.
Turn the generator's main circuit breaker to its ON or CLOSED
position. The generator now powers all LOAD circuits. Check
generator operation under load as follows:
• Turn ON electrical loads to the full rated wattage/amperage
capacity of the generator. DO NOT OVERLOAD.
• With maximum rated load applied, check voltage and fre-
quency across transfer switch terminals E1 and E2. Voltage
should be greater than 230VAC and frequency should be
greater than 59 Hertz.
• Let the generator run under rated load for at least 30 minutes.
With unit running, listen for unusual noises, vibration, over-
heating, etc., that might indicate a problem.
6.
When checkout under load is complete, turn the generator's
main circuit breaker to its OFF or OPEN position.
7.
Let the generator run at no-load for several minutes. Then,
shut down by setting the AUTO/OFF/MANUAL switch to its
OFF position.
8.
Move the transfer switch's main contacts back to their UTIL-
ITY position. For example, LOAD connected to UTILITY power
supply. Refer to "Manual Operation". Handle and operating
lever of transfer switch should be in the UP position.
9.
Turn on the utility power supply to transfer switch, using the
UTILITY SERVICE DISCONNECT circuit breaker. The utility
power source now powers the loads.
10. Set the generator's AUTO/OFF/MANUAL switch to its AUTO
position.
8
3.5
TESTING LOAD SHED MODULE
(LSM)
A Test pushbutton is provided on the bottom of the LSM to test the
operation of the tested functions. The Test button will work when
the ATS is in the Utility or the Generator position.
1.
Turn the Utility supply on to the ATS.
2.
Press the TEST pushbutton on the LSM.
3.
Verify that all of the connected loads to be "shed" become
disabled. The method of verification will depend on the type
of load.
4.
After 5 minutes verify the priority 1 loads are enabled. Status
LED L1 and Air 1 is ON.
5.
After another 30 seconds, verify the priority 2 loads are
enabled. Status LED L2 and Air 2 is ON.
6.
After another 30 seconds, verify the priority 3 loads are
enabled. Status LED L3 is ON.
7.
After another 30 seconds, verify the priority 4 loads are
enabled. Status LED L4 is ON.
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