Generac Power Systems RTSJ200A3, Owner'S Manual

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3.4 GENERATOR TESTS UNDER
LOAD
3.4.1 ATS & CRITICAL LOADS
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. Manually actuate the LSS main contacts to the UP position.
Non-essential loads OFF.
5. To start the generator, set the AUTO/OFF/ MANUAL switch to
MANUAL. When engine starts, let it stabilize for a few min-
utes.
6. 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.
7. When checkout under load is complete, set main circuit
breaker of the generator to its OFF or OPEN position.
8. Let the generator run at no-load for several minutes. Then,
shut down by setting the AUTO/OFF/MANUAL switch to its
OFF position.
9. Move the switch's main contacts back to their UTILITY posi-
tion. For example, LOAD connected to UTILITY power supply.
Refer to "Manual Operation". Handle and operating lever of
transfer switch should be in UP position.
10. Turn on the UTILITY power supply to transfer switch, using
the UTILITY SERVICE DISCONNECT circuit breaker. The utility
power source now powers the loads.
11. Set the generator's AUTO/OFF/MANUAL switch to its AUTO
position.
3.4.2 AUTO OPERATION AND LOAD SHED FUNCTIONAL
TEST
1. Set the generator’s main circuit breaker to its ON or CLOSED
position.
2. Set the UTILITY SERVICE DISCONNECT circuit breaker to the
ON position.
3. Set the generator’s AUTO/OFF/MANUAL switch to its AUTO
position.
NOTE:
The Utility source will now be supplying the customer loads.
4. Set the UTILITY SERVICE DISCONNECT circuit breaker to the
OFF position. The generator will start and the transfer switch
will connect the customer load to the Generator supply.
5. Load shed function test. Press the LOAD SHED RESET/ TEST
pushbutton on the outside of the ATS enclosure door. It will
be necessary to press this button for ≥ 6 seconds. Release
the pushbutton when the Load Shed Switch (LSS) actuates,
disconnecting the non-essential loads. The LOAD SHED LED
will illuminate.
6. The next step will depend on how the LSC is set up (see the
“Load Shed Controller” section). If set up for:
• Manual Operation - Press the door mounted LOAD SHED
RESET/ TEST pushbutton for ≥ 2 seconds. Release the
pushbutton when the LSS actuates, reconnecting the non-
essential loads.
• Automatic Operation – The LSS will reconnect non-essential
loads after the delay setup on the DIP switches of the LSC.
7. Set the UTILITY SERVICE DISCONNECT circuit breaker to the
ON position. The ATS will transfer the customer load to the
Utility supply. The Generator will turn OFF after the cooldown
period has expired.
Operation