Generator Tests Under Load - Generac RTS Manual Tecnico

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 "Manual
Operation".
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 the 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 200 volts (208VAC sys-
tem), 230 volts (240VAC system), or 460 volts (480VAC
system); frequency should be greater than 59 Hz.
• 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.
NOTE: 5. When checkout under load is complete, set main circuit
breaker of the generator to the 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 the UTILITY position.
For example, load connected to utility power supply. Refer to
"Manual Operation". Handle and operating lever of transfer
switch should be in down 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 opera-
tion.
Operation
7