Section 2
MAJOR GENERATOR COMPONENTS
Rotor will be lost. The unit’s AC output voltage will then drop to a value commensurate with the Rotor's residual magnetism (about
Figure 2-6. – Excitation Circuit Breaker
VOLTAGE REGULATOR:
Six (6) leads are connected to the voltage regulator as follows:
•Two (2) SENSING leads deliver ACTUAL AC out- put voltage signals to the regulator. These are Wires No. 11S and 22S.
•Two (2) leads (4 and 0K) deliver the regulated direct current to the Rotor, via brushes and slip rings.
•Two (2) leads (No. 6 and 2A) deliver Stator excita- tion winding AC output to the regulator.
Figure |
The regulator mounts a “VOLTAGE ADJUST” poten- tiometer, used for adjustment of the
ADJUSTMENT PROCEDURE:
With the frequency set at 62.5 Hertz and no load on the generator, slowly turn the voltage adjust pot on the voltage regulator until 124 VAC is measured. If voltage is not adjustable, proceed to Section 6 - Troubleshooting; Problem 2.
NOTE: If, for any reason, sensing voltage to the regulator is lost, the regulator will shut down and excitation output to the Rotor will be lost. The AC output voltage will then drop to a value that is commensurate with Rotor residual magnetism (about
NOTE: Adjustment of the regulator's “VOLTAGE ADJUST” potentiometer must be done only when the unit is running at its correct governed
CRANKCASE BREATHER
Figure |
DESCRIPTION:
The crankcase breather is equipped with a reed valve to control and maintain a partial vacuum in the crankcase. The breather is vented to the intake
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