T.O. 35 C2-3-442-2
P-9-TM-457-35
TM 5-6115-457-34
TM-07464A-35
(c) Reactive power division. -
the maximum and minimum power output
At no time shall the difference in average
delivered by one set, for constant system
reactive KVA supplied by any three sets
load conditions.
differ by more than ten percent of the
reactive KVA rating of one set. For the
( c ) Reactive power division. -
above requirements, the initial system load
At no time shall the difference in average
shall be equally divided between the sets,
reactive KVA supplied by any three sets
both as to active and reactive components;
differ by more than ten percent of the
thereafter, there shall be no adjustments
reactive KVA rating of one set. For the
to governors, voltage regulators, or any
above requirements, the initial system load
other components as system load is
shall be equally divided between the sets,
changed.
both as to active and reactive components;
thereafter, there shall be no adjustments
b . REVERSE POWER TEST. Perform
to governors, voltage regulators, or any
the reverse power test as follows:
other component as system load is changed.
When voltage regulators are not intercon-
1. Operate two generators sets in
nected between sets, the above require-
parallel at no load with load contractors
ments shall apply also, except that voltage
closed, refer to Operator and organizational
droop not exceeding three percent may be
Maintenance Manual,
introduced through the voltage regulator
reactive droop compensating circuits.
2. Lower speed of generator set
being tested until the REVERSE POWER
4. Utility generator sets shall divide
fault locator indicator illuminates. Record
load in accordance with the following system
value of kilowatt load at which the load
load at rated power factor is varied between
contactor opens. The load contactor shall
20 and 100 percent (and vice versa) of the
open when power flow into the generator sets
combined rating of the connected sets:
exceeds 20 percent of rated value, causing
the REVERSE POWER fault locator indi-
( a ) Real power division. - At
cator to illuminate.
no time shall the difference between the
average individual kilowatt outputs of the
10-19. ENGINE EFFICIENCY TEST.
three sets, when supplying the system load,
be greater than ten percent of the kilowatt
Perform the engine efficiency test
rating of one set.
as follows:
(b) Power exchange. - At any
a. Operate the generator set at full
constant system load up to the combined
rated load, speed, and voltage. Check the
rating of the sets in parallel, power
engine exhaust for excessive smoke and
exchange between the sets shall not exceed
density of smoke.
10 percent of the KW rating of one set.
b. The engine shall deliver 125 percent
Power exchange is the difference between the
of rated load for five minutes. Engine
the maximum and minimum power output
exhaust smoke should be just visible at
delivered by one set, for constant system
100 percent load.
load conditions.
10-8
