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FLOW CHART D. EXCITER FIELD BREAKER TRIPS
STANDARD VOLTAGE REGULATOR
START
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Check for any loose or broken wires or connections
on VR21 assembly.
Does AC output voltage build up to 15O0/o0r
more of rated voltage before breaker trips?
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Check diodes and SCR's in bridge assembly
CR21 per TEST [C].
Check reference transformer T21 and connections
per TESTS [E] and [a]. Replace if bad.
Check exciter stator winding per TEST [HI.
Replace if bad.
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Check generator stator leads for proper
connection. See Figure 26.
Check exciter rotor winding per TEST [J].
Replace if bad.
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Check generator rotor field winding per
TEST [L]. Replace if bad.
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Check generator stator windings per TEST [K].
Replace if bad.
Test voltage regulator assembly per
procedure (S). Replace the regulator PC
board per procedure (F)if defective.
The new printed circuit board might
be damaged by malfunctioning
components within the control. Do not install the new
PC board until all other problems have been located
and corrected.
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