(3) Insert load leads through plate and
Do not place the circuit breaker switch
the generator set air intake.
on any of the generator sets in the
CLOSE position until specifically direc-
ted to do so. Closing the circuit breaker
The load terminal boards will accommo-
switch at any other time may severely
date 2-wire single phase and 4-wire
damage one or more of the generator
three phase loads. One or more single
phase loads can be served alone or in
but the load on any one phase must
not exceed 100 percent of the cur-
Check that the main power switch
rent rating of that phase.
that wire sizes are correct for load to
attempting to place a generator set
(4) Connect the load to terminals marked
Make certain that the load terminal
(3) Hold the CKT BKR switch (30, figure
boards of the sets to be paralleled are
of the "on-line" set
in the CLOSE position
Reading left to
until the CKT BRK indicator light (31) illuminates.
right, phase rotation for the phase
Place the operation switch (26) in the PARALLEL
loads is L1, L2, L3. Be sure L1 is
connected to L1, L2 is connected to
(4) Adjust the voltage on both sets to the
required value. Adjust the frequent y of the "on-
(5) Connect load leads and paralleling cables
line" set to the required value. Place the operation
s w i t c h (26) of the "on-coming" set in the
After load connection, tighten binding
nuts with plastic/phenolic box end
Observe the synchronizing lights of the
wrench and install safety cover.
"on-coming" set. The lights should go
on and off simultaneously. If the lights
go on and off alternately, sets are out
of phase. Stop both sets and correct
sets requires that paralleling cables be
installed and the shorting plug located
problem persists, refer to next higher
level of maintenance.
of each generator set be removed.
d. Parallel Operation (Load Sharing).
set a little higher than the "on-line" set. Then
reduce the frequency slowly with the frequency
(1) The first set started shall be designated
adjust reheostat (29) until the synchronizing lights
as "on-line" and the sets in parallel operation
(25) remain on or off at 2 to 3 second intervals.
With all sets
shall be designated on-coming".
shut down install the paralleling cable and connect
the load terminal boards as described in paragraph
that the voltage reconnection boards