Generator Tests Under Load - Generac Power Systems RTS Technical Manual

8. Set the generator's main circuit breaker (CB1) to its OFF or
OPEN position.
9. Set the AUTO/OFF/MANUAL switch to the OFF position to shut
down the generator.
Do NOT proceed until generator AC output voltage and frequen-
cy are correct and within stated limits. If the no-load voltage is
correct but no-load frequency is incorrect, the engine governed
speed probably requires adjustment. If no-load frequency is
correct but voltage is not, the voltage regulator may require
adjustment.
3.4 GENERATOR TESTS UNDER
LOAD
1. Set the generator's main circuit breaker to its OFF or OPEN
position.
2. Manually actuate the transfer switch main contacts to their
EMERGENCY (STANDBY) position. Refer to the "Manual
Operation" section.
3. To start the generator, set the AUTO/OFF/MANUAL switch to
MANUAL. When engine starts, let it stabilize for a few min-
utes.
4. 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/amper-
age capacity of the generator. DO NOT OVERLOAD.
• With maximum rated load applied, check voltage and
frequency across transfer switch terminals E1 and E2.
Voltage should be greater than 230 volts and frequency
should be greater than 59 Hertz.
• Let the generator run under rated load for at least 30 min-
utes. With unit running, listen for unusual noises, vibra-
tion, overheating, etc., that might indicate a problem.
6
Section 3 — Operation
RTS "HS" Type Transfer Switch
NOTE:
5. When checkout under load is complete, set main circuit
breaker of the generator to its OFF or OPEN position.
6. Let the generator run at no-load for several minutes. Then,
shut down by setting the AUTO/OFF/MANUAL switch to its
OFF position.
7. Move the switch's main contacts back to their UTILITY posi-
tion. For example, load connected to UTILITY power supply.
Refer to the "Manual Operation" section. Handle and operating
lever of transfer switch should be in UP position.
8. Turn on the UTILITY power supply to transfer switch, using
whatever means provided (such as a UTILITY main line circuit
breaker). The UTILITY power source now powers the loads.
9. Set the generator's AUTO/OFF/MANUAL switch to its AUTO
position. The system is now set for fully automatic operation.