16
OPM-124/B
step is to check the voltage at the generator terminals
in the Automatic Transfer Switch. The voltage between
the G1 and the G3 terminals should be the same as it
was on the generator front panel. The voltage should
also be checked between the hot terminals (G1 and G3)
and the G-N to be certain of a balanced voltage output
and a solid neutral connection. The voltage between G1
and G-N should be about 120 volts AC (277 on 480
units). The same approximate voltage should be found
between terminals G3 and G-N (120 volts AC).
On three phase panels the G2 voltage level should also
be checked. ON 240 VOLT (DELTA) SYSTEMS BE SURE
YOU KNOW WHERE THE HIGH VOLTAGE “WILD” LEG IS.
IT MUST BE IN THE SAME LOCATION ON THE LINE SIDE
AS IT IS ON THE GENERATOR SIDE. (i.e. if it’s on L-3 on
the line side it must be on G-3 on the generator side.
Also on three phase systems make sure that the
rotation is the same on the generator as it is on
your line power. Failure to insure proper rotation will
cause three phase motors to spin backwards possibly
damaging them.
NOTICE:
If for any reason during the check out procedure the
voltage and frequency are not correct, depress the STOP/
RESET button and correct the trouble before proceeding.
4. Stopping - There are two ways to stop the unit when it is
in the manual mode. Pressing the STOP/RESET button will
stop the unit immediately. Pressing the AUTO mode
button will stop the unit but only after the cool down
timers have timed out and there is no remote start signal
being sent to the unit.
AUTO MODE
To activate the automatic start mode you will just need to
depress the AUTO button, the LED indicator beside the
button confirms that the unit is in automatic mode.
To test the Automatic Transfer Switch, follow the instruction
on the operator’s manual that came with the transfer
switch. If you get a fault during the initial start up or prior
to start up, it is most likely a false warning light. Simply reset
the ATS start over.
Once you have completed testing of the ATS, be sure you
ALWAYS leave the system in the standby mode,unless
servicing the unit. For standby operation, press the AUTO
button on the front of the control. The green light should
light up next to the AUTO button.
NOTE: For setting the exerciser circuit, for all ATS, see the
operator’s manual shipped with the ATS.
