ARMY TM 9-6115-60412
NAVY NAVFAC P-8-633-12
4-143. PARALLELING CURRENT TRANSFORMER CT114. See Figure 3-28 PARALLELING CURRENT transformer
CT114 is used to balance load distribution between paralleled generator sets during isochronous parallel operation.
Dangerous voltage levels may be present at components located within cabinet
C. Observe all applicable safety precautions as outlined in Chapter 1, Section III,
of this manual.
a.
Test.
(1)
Tag and disconnect wiring from PARALLELLING CURRENT transformer CT114.
(2)
With multimeter set to RX1 scale, check continuity of transformer winding. Ohmic value is
approximately 0.002 ohms.
(3)
Connect a 500 V dc megohmmeter across either transformer lead and ground. Operate
megohmmeter for 60 seconds and observe the resistance Reading should be not less than 100
megohms.
(4)
If PARALLELING CURRENT transformer CT114 falls to pass any test procedures, refer to the next
higher level of maintenance.
(5)
Reconnect wires and discard tags.
4-144. INSTRUMENT CURRENT TRANSFORMERS CT10 THROUGH CT12. See Figure 3-28. INSTRUMENT
CURRENT transformers CT10 through CT12 sense current through the generator output line and provide signals used for
metering and fault protection.
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III , of
this manual.
a.
Test. Perform the following test procedures on each current transformer.
(1)
Tag and disconnect wiring from INSTRUMENT CURRENT transformers CT10, CT11, and CT12.
Perform the following procedures Individually on each current transformer.
(2)
With multimeter set to RX1 scale, check continuity of the transformer winding. Ohmic value is
approximately 0 002 ohms.
(3)
Connect a 500 V dc megohmmeter across either transformer lead and ground. Operate
megohmmeter for 60 seconds and observe resistance Reading should be no less than 1 megohm.
(4)
Refer any INSTRUMENT CURRENT transformer that fails a test procedure to the next higher level
of maintenance.
(5)
Reconnect wires and discard tags.
4-203/(4-204 blank)
