P-9-TM-457-35
T. O. 35C2-3-442-2
TM-07464A-35
TM 5-6115-457-34
6-164. BENCH TEST.
NOTE
a. Connect the overvoltage relay to the
Remove cover from tactical relay
test equipment as illustrated in figure 6-42.
box to gain access to test points,
see figures 6-15 and 6-47.
WARNING
1. With the generator set opera-
Exercise extreme care when making
ting at the rated speed and voltage, and
tests as high voltages present will
with the contactor closed, measure the
cause injury to personnel upon contact.
voltage from terminal 1 to terminal 2 of
the K2 relay. Nominal voltage is 120 VAC.
b. With all switches open, energize the
Voltage from TB2-5 to K2 terminals 3 and
60 hertz variable voltage supply and adjust
6 should measure 20-32 VDC. Shutdown
voltage to 120 VAC. Close switch S2 then
generator set.
S3. Indicator DS1 should be energized and
DS2 should be de-energized.
2. Install a 250 ohm, 25 watt resis-
c. Adjust 60 hertz variable voltage
tor in series with voltage adjustment rheostat
supply to 157 VAC. Indicator DS1 should
R2 between wire number X9F10 and TB1-7
de-energize and DS2 should energize.
located in the control cubicle. With the gen-
erator set operating at the rated speed and
d. Open switches S2 and S3 and energize
voltage, increase output voltage such that
the 400 hertz variable voltage supply. Ad-
the voltage across terminals 1 and 2 of K2
just the voltage to 120 VAC. Close switch
relay measures 153 3 volts. When the K2
S1 then S3. Indicator DS1 should be
relay actuates there should be a momentary
energized and DS2 de-energized.
dc voltage measured from terminal 7 of K2
to TB2-5 and there should be no dc voltage
e. Adjust 400 hertz variable voltage
measured from terminal 3 of K2 to TB2-5.
supply to 151 VAC. Indicator DS1 should
If the above conditions are not met, replace
de-energize and DS2 should energize.
the K2 relay.
f. If the overvoltage relay does not meet
the requirements of the above tests, replace
b. Removal. Refer to figure 6-47 and
the relay.
tag, then disconnect wiring at the over-
voltage relay terminals. Remove the four
g. Remove the overvoltage relay from
screw assemblies securing the relay in
the test equipment.
position.
6-127
Change 3
