TM 5-6115-465-34
T0 35C2-3-446-2
NAVFAC P-8-625-34
TM 06858B/06859D-34
ELECTRICAL PERFORMANCE CHARACTERISTIC PARAMETERS
Table 7-3.
AC PRECISE (CLASS 1) (CONT)
TEST METHOD
VALUE
MIL-STD-705
CHARACTERISTIC PARAMETER
b. Frequency characteristic
0.25
608.1
1. Regulation (%)
2. Steady-state-stability (variation (bandwidth %)
608.1
0.5
(a) Short term (30 seconds)
1
608.2
(b) LO ng term (4 hours)
S. Transient performance
(a) Application of rated load
608.1
1.5
(1) Undershoot (%)
608.1
1
(2) Recovery (seconds)
(b) Rejection of rated load
608.1
1.5
(1) Overshoot (%)
608.1
1
(2) Recovery (seconds)
4. Frequency adjustment range (Hz)
511,2
+2
(a) 50 Hz
511.2
+2
(b) 60 Hz
+20
(c) 400 Hz
511.2
-10
NOTE
1. The voltage shallstabilize at or
above this voltage.
2. The generator set connected for
three phase output and supplying a single
phase, unity power factor load
connected line-to-line, with no other load
on the set. The load current to
be 25 percent of the rated full load current
of the set.
(2) The voltage unbalance is the difference
(b) Connect the frequency meter to one of
the armature coils of the generator.
between the maximum and minimum armature coil
voltages. To express this in percent divide this
difference by rated armature coil voltage and multi-
(c) Provide separate excitation for the
ply by 100.
exciter field.
(2) Test.
Voltage Unbalance (Coil), in percent -
(a) Start and operate the generator at
V max - V min
rated frequency and at no load.
x 100
V Rated
(b) Adjust the excitation so that any one
of the coil voltages is at rated value.
(3) Compare the results of step (2) above with
the requirements.
(c) Read and record the generator fre-
quency (speed) and the voltage of each armature coil
7-14. REGULATOR RANGE TEST.
d. Generator With Separate Excitation:
a. "General. The voltage adjust device associ-
ated with the voltage regulator provided with the
(1) Determine from the data obtained in 7-13d.
generator set must have adjustment capable of
(2) the maximum and minimum armature coil voltages.
7-6
