Generator Voltage Checks - Generac Power Systems RTSN100J3S Owner's Manual

Measure across ATS terminal lugs N1 to NEUTRAL,
N2 to NEUTRAL, and N3 to NEUTRAL.
3. Three-phase only. Locate the 3 phase power
monitor relay. Verify the following:
208 Vac system - LED Green and ON
The factory setting is 80% of nominal voltage
(208 Vac systems = 166 Vac dropout)
4. If the LED indicator is Red or not ON, then it will
be necessary to adjust the power monitor relay
setting. Rotate the adjustment potentiometer in a
counter-clockwise direction until the LED turns
ON. At this point the 3 phase power monitor relay
is the most sensitive to irregular power line con-
ditions.
If the power monitor does not operate properly,
check that all three voltages are present, and are
of the correct voltage level
6
Section 3 — Operation
RTS "HS" Type Transfer Switch
Figure 3.1 — Actuating Transfer Switch
NOTE:
DANGER

FAILURE TO TURN OFF THE UTILITY SUPPLY
BEFORE WORKING ON THE UTILITY CONNEC-
TIONS OF THE ATS WILL RESULT IN EXTREMELY
DANGEROUS AND POSSIBLY FATAL ELECTRICAL
SHOCK.
5. When certain that UTILITY supply voltage is cor-
rect and compatible with transfer switch ratings,
turn OFF the UTILITY supply to the transfer
switch.

3.3.2 GENERATOR VOLTAGE CHECKS

1. On the generator panel, set the AUTO/OFF/
MANUAL switch to MANUAL position. The gen-
erator should crank and start.
2. Let the generator stabilize and warm up at no-
load for at least five minutes.
3. Set the generator's main circuit breaker (CB1) to
its ON or CLOSED position.