T . O . 35C2-3-442-2
P-9-TM-457-35
TM-07464A-35 TM 5-6115-457-34
e. The frequency and voltage requirements are indicated below:
utility
Precise
Frequency
2 percent
0.5 p e r c e n t
Steady State Band (30 see)
4 seconds
3 seconds
R e c o v e r y Time
4 percent
6.0 percent
Overshoot and Undershoot (Apply Full Load)
2 to 3 percent
0 . 2 5 percent
Regulation
Precise
Utility
Voltage
2 percent
1.0 p e r c e n t
Steady State Band (30 sec)
3 percent
1 . 0 percent
Regulation
10-17. LONG TERM STEADY STATE
1. Operate two or more generator
STABILITY TEST .
sets in parallel at 240/416 volts at no load,
refer to Operator and Organizational Main-
tenance Manual.
Perform the long term steady state
stability test as follows:
2. If necessary, make fine adjust-
ments to governors and exciter regulator
a. Operate the generator set at rated
paralleling controls, with generator sets
speed, voltage, and full load for a period of
operating in parallel and at no load.
four hours.
3. Precise generator sets shall
b. Record voltage and frequency at start
divide load in accordance with the following
and f ini ah of the four ham period. The long
as system load at rated power factor is
term steady deviation at constant loads
varied between zero and 100 percent (and
from no load to full load shall be as follows:
vice versa) of the combined rating of the
connected sets:
1. The bandwidth shall remain within
1 percent (for precise generator sets) and
(a) Real power division. - A t
3 percent (for utility sets) of the rated
no time shall the difference between the
frequency.
average individual kilowatt outputs of the
three sets, when supplying the system load,
2. The bandwidth shall remain within
be greater than ten percent of the kilowatt
2 percent (for precise generator sets) and
rating of one set.
4 percent (for utility generator sets) of the
rated voltage.
(b) Power exchange. - At any
10-18. PARALLEL OPERATION AND
constant system load up to the combined
rating of the sets in parallel, power ex-
REVERSE POWER TEST.
change between the sets shall not exceed
10 percent of the KW rating of one set.
a. PARALLEL OPERATION. Perform
Power exchange is the difference between
the parallel operation test as follows:
change 7
10-7
