Operation; Testing The Automatic Transfer Switch - Briggs & Stratton 071038 Guide D'installation Et D'utilisation

Operation

To select automatic transfer operation, do the following:
1. Set circuit breaker in main distribution panel feeding
transfer switch to "ON" position.
2. Install 15 Amp fuse in generator's control panel.
3. Set generator's circuit breaker to "ON" position.
4. Set generator's system switch to "AUTO" position.
The system will now be in automatic operation mode.
When the generator is providing power to the transfer switch,
the transfer switch control board is constantly monitoring
generator power. If the air conditioner is called to run, and
there is sufficient generator power available, the controller
will close contacts "A-A" to air conditioner contactor.
Contacts "B B" will open before contacts A-A close. If loads
are too great for the generator, contacts A-A and/or B-B will
open. When air conditioning is not needed, A-A will open. If
enough power is available, B-B will close.
NEMA 3R Enclosure Door
To open door, press the spring-load door lock to the right
and pull down on the door.
To close and latch door, push door closed against enclosure.
While in this position, push door upwards. This will cause
spring-load door lock to engage and latch door in place.
Enclosure door MUST be closed and latched at all times
except when system is being serviced.

Testing the Automatic Transfer Switch

Turn the main distribution panel breaker feeding the transfer
switch to the "OFF" position. The system's automatic
sequence will initiate. To return to utility power, turn the main
distribution panel 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. Use
jumper on transfer switch control board to select delay of
20 seconds or 50 seconds.
Transfer
Transfer from utility to generator supply occurs after voltage
is above set levels. 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.
11