Testing The Automatic Transfer Switch - Briggs & Stratton 100 Manual De Instalación Y Operador

Supervisory Control Wiring (A-A and B-B)
1. A-A and B-B are NC contacts that are used as lockouts when
the transfer switch is switched to generator power.
NOTE: There are two circuits provided to keep the supervisory
loads separated from each other.
2. Air conditioning control wiring or larger loads can be
connected to A-A or B-B.
3. A-A and B-B are rated 120V AC, 1A
A
A
B
B
4. A-A and B-B wire range 12 - 22 AWG. Torque 12 lb/in.
120V AC
LOAD
NEUTRAL
120V AC
LOAD NEUTRAL

Testing the Automatic Transfer Switch

Turn the utility service disconnect circuit breaker feeding the transfer
switch contactor to the OFF position. The system's automatic sequence
described below will initiate. To return to utility power, turn the utility
service disconnect circuit breaker to the ON position.
Utility Fail
The generator senses when utility voltage is below 70 percent of nominal.
Engine start sequence is initiated after 6 second time delay.
Engine Warm-Up
Time delay to allow for engine warm-up before transfer. Select delay of
20 seconds or 50 seconds.
Transfer
Transfer from utility to generator supply occurs after voltage is above set
levels, the generator control board will send a transfer signal (12 VDC)
to TRCM board. At this time the red LED will turn on and transferswitch
switches to generator power. Minimum engine run time is 5 minutes after
transfer.
Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.
Retransfer
Retransfer from generator to utility power is approximately 10 seconds
after utility voltage supply is above pickup level and minimum run time is
completed.
Engine Cool Down
Engine will run for 60 seconds after retransfer.
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