ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
(3)
Reactive Gable Assembly. This cable assembly is used to interconnect the generator set to another
generator set for isochronous paralleling. The two element cable interconnects generator set
paralleling current transformers CT114 and voltage regulators VR101. The cables are 100 feet (30
meters) long and connect to the REACTIVE LOAD receptacles J21, J22, or J23 (3, figure 2-17) on
the right side of the generator set.
(4)
Governor Circuit Cable Assembly. This cable is used to interconnect generator set governor control
circuits for isochronous paralleling. The two element shielded cable interconnects generator set load
sharing panels A104. The cable is 100 feet (30 meters) long and connects to GOVERNOR CONT
receptaclesJ18, J19, orJ20 (Figure 2-17) on the right she of the generator set.
(5)
Station Power Cable Assembly. The station power (utility power) cable assembly is used to connect
the generator set to an external single phase, 240 V ac power, or 380 V ac power source. The 100
foot (30 meter) cable is connected to UTILITY POWER receptacle J101 (Figure 1-4) on the right side
at the generator set to bring in power to connection board assembly TB103. TB103 is set to connect
the power to generator set 120 V ac circuits directly, or through utility station power transformer
T103, depending on whether the utility power is 240 V ac or 380 V ac, respectively. Cable ends at
the opposite end of the station power cable assembly allow for connection to three chase or single
phase power.
4-35.
MAINTENANCE OF WIRING HARNESSES. Wiring harnesses are used for electrical connections, in the
generator set.
To avoid death or injury to personnel, no electrical component will be worked on
while energized. Verify that the load cables are disconnected and "parked" and
that MAIN DISCONNECT switch S120 is set to OPEN. Ensure equipment is 'tagged
out" in accordance with Chapter 1, Section III, of this manual and equipment is
NOT energized. Residual voltage is present at the generator leads with regulator
turned off, reaching SEVERAL HUNDRED VOLTS on the generator set. Proper
Insulation and isolation of metering equipment must be observed when testing
this generator. USE PROPER TEST EQUIPMENT TO CHECK FOR VOLTAGE
before proceeding with work.
a.
Remove.
(1)
Remove all hangers, clamps, and ties attaching the harness to be replaced on the generator set.
(2)
Tag and disconnect all wires terminating In lugs from their mountings by removing nuts and washers
attached to their lugs
(3)
Where wires are soldered to a connector, the connector is considered part of the harness and is
replaced with the harness. Remove screws, nuts, and washers, as necessary, to remove multiple connectors.
(4)
Remove harness from generator set by withdrawing wires past any obstruction until wires are free of
the generator set
b.
Test.
(1)
Note carefully any malfunction of the generator set traceable to components that are electrically
connected to the harness being tested.
(2)
Where there is indication that a given harness is causing a malfunction, test the wires relating to the
malfunctioning circuit both for continuity and internal shorts. Check all suspect wires for continuity to grocers. See to the
applicable wiring diagram FO-4 through FO-12.
4-95
