TM 9-6115-604-34
NAVFAC P-8-633-34
SECTION XI. LOAD TERMINALS
5-52. GENERAL The load terminals act as receptacles for the external load cables. The load terminals provide a
physical connection between Main Disconnect Switch S120 and the external load cables.
5-53. LOAD TERMINAL DISASSEMBLY. See Figure 5-41.
NOTE
Before proceeding, ensure that the generator set is shut down and the external load cables are
disconnected.
a.
Set the MAINTENANCE LOCKOUT switch S100 to MAINTENANCE and place a danger tag on the switch.
b.
Remove nut (1) and washer (2) which secure the load cable (3) to the rear of the load terminal (4).
c.
Remove the nut (5), washer (6). and screw (7) which secure the ground wire (8) to the load terminal insert (9)
and remove the ground wire.
d.
Remove the load terminal insert (9) by pulling it out of the load terminal.
e.
Remove the two nuts (10) and screw (11) which secure the ground wire (8) to the load terminal (4) and remove
the ground wire.
f.
Remove the four capscrews (12) and washers (13) that secure the load terminal (4) to the outgoing power
enclosure and remove the load terminal.
5-54. TEST OF LOAD TERMINAL See Figure 5-41.
WARNING
Be sure that the test equipment is turned off before connecting the tester to the load terminal.
Death by electrocution may result N test equipment Is turned on when connecting It to the
load terminal.
a.
Connect the positive lead of a 30 kV dc hi-pot tester to the center conductor of the load terminal.
b.
Connect the negative lead of the tester to the outer shield of the load terminal.
WARNING
Be sure that personnel do not come In contact with load terminal during test. Death by
electrocution may result.
c.
Set all controls on the tester to zero and turn on the tester.
d.
Increase output voltage of the tester to 5 kV and maintain for 1 minute. Record reading on current meter.
e.
Increase tester output to 10 kV for 1 minute and record reading on current meter.
f.
Increase tester output to 15 kV for 1 minute and record reading on current meter.
g.
Increase tester output to 20 kV for 1 minute and record reading on current meter.
h.
Increase tester output to 25 kV and maintain for 15 minutes. Record readings on current meter at 1 minute
intervals.
i.
After 15 minutes, decrease tester output to zero volts and turn off tester.
WARNING
Be sure tester Is turned off before disconnecting leads Death by electrocution may result.
NOTE
Leakage current is dependent on insulation condition as well as atmosphere conditions
(humidity). Leakage current normally should not exceed 50 microamperes.
j.
Disconnect leads from load terminal. Compare all meter readings taken during the test. Any sharp increase in
readings during waiting periods indicates insulation breakdown of the load terminal and terminal should be
replaced.
5-95
