T.O. 35C2-3-442-2
P-9-TM-457-35
TM 5-6115-457-34
TM-07464A-35
6-190. BENCH TEST.
energizes. Indicated frequency should be
a. Connect the under frequency relay
55 1 Hertz.
to the test equipment as illustrated in
d. Open all switches. Adjust input
frequency to 50 Hertz. Close switches
WARNING
Exercise extreme care when
S1, S2, and S3. Indicator DS1 should be
energized and DS2 should be deenergized.
making tests as high voltages
present will cause injury to
e. Decrease frequency until indicator
personnel upon contact.
DS1 deenergizes and DS2 energizes. In-
dicated frequency should be 46 1 Hertz.
b. Energize 24VDC power supply.
Energize 120 VAC variable frequency
power supply and adjust frequency to 60
Hertz. Close switches S1 and S2. In-
dicator DS1 should be energized and DS2
not meet the requirements of the above
should be deenergized.
tests, replace the relay.
g. Remover the under frequency relay
Decrease input frequency until
c.
indicator DS1 deenergizes and DS2
from the test equipment.
6-149
Change 3
