O p e ra ting Instruc tio ns
Power generator sets with different capacities can also
The generator sets are equipped with a
N OT E:
be paralleled by dividing the load proportionately to
resistor and current transformer connected in
their capacity.
series with the voltage coil of the regulator
(cross-current compensation) which equalizes
most hut not all of the reactive KVA load
ST OPPI N G
between the generators.
The procedure for stopping a power generator set or
8. When the load is unity power factor (lighting and a
taking a set out of parallel is as follows:
few small motors only). follow the instructions in
Item 6 above until both ammeters read the same.
1. Turn off all the load on the generator when stopping
a single engine unit. Shift the load from the generator
9. When the load is 80 per cent power factor lagging
when taking a set out of parallel operation by turning
(motor and a few lights only), turn the vernier throttle
t h e vernier throttle knob (17), Fig. 1, until the
knob (17) on the incoming set until the ammeter on
ammeter (11) reads approximately zero.
that set reads approximately 40 per cent of the total
current load.
2 . Place the circuit breaker control (10) in the of
position.
IO. Rotate the voltage regulator rheostat control (4) on
the incoming set (generally counterclockwise to raise
3. Turn the field rheostat (8) to the fully clockwise
the voltage) until the ammeters read the same on both
position.
sets.
4. Turn the voltage regulator switch (3) to t h e o f
If a load was not added during
position.
N OT E:
paralleling. t h e t o t a l o f t h e t w o a m m e t e r
readings should be the same as the reading
5. Place the field switch (7) in the off position.
before paralleling. Readjust the voltage regula-
6. Press the throttle button (15) and turn the throttle
tor rheostat (4) on the incoming set, if
control (16) to stop to shut down the engine.
necessary.
When performing a tune-up on a unit
11. To reset the load voltage, turn the voltage regulator
N OT E:
that will be operated in parallel with another
rheostat controls slowly on each set. It is necessary to
set, adjust the speed droop as specified in
turn the controls the same amount and in the same
direction to keep the reactive current equally divided.
Engine Tune-Up.
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