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2. AC Control
Ac Control Panel Components
The generator set control box is mounted on top of the generator enclosure, facing the rear or either side. Figure 2-1 points out the components on the control panel that have to do with AC output control. See Page 7-3 for the connection diagram.
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Field Clrcult Breaker (CB21): The field circuit breaker protects the generator from over-excitation.
AC Voltmeter (M21): The voltmeter indicates output voltage for the phase selected.
ACAmmeter(M22):The ammeter indicates output amperage for the phase selected. Input to the am- meter is from current transformers CT21, CT22 and CT23. (CT23 is provided for 3-phase only.)
Phase Selector Switch (521): The selector switch is used to select the phase for voltage and amperage readings.
Scale Indicator Lamps (0521 and DS22): The scale indicator lamps indicate whether to read the upper or lower scales of the voltmeter and ammeter.
Frequency/RPM Meter (M23): The frequency meter indicates output frequency in Hertz (Hz) and engine speed in RPM.
Output Voltage Trimmer (R21): The output voltage trimmer can be used to adjust output voltage plus or minus five percent of nominal voltage.
Control Box
Figure 2-2 illustratesthe control box with the control panel hinged open. Note the lexan (red plastic) cover secured over the meters to protect from electric shock.
~AWARNING]HAZARDOUS VOLTAGE! Touching unlnsulated llve parts inside the control box can result In severe personal Injury or death. Relnstall the protective cover to prevent contact wlth bare, llve meter tennlnals.
LEXAN COVER SECURED BY INSU THIS COVER MUST ALWAYS BE REINSTAUED FOLLOWING SERVICE TO PROTECT FROM ELECTRIC SHOCK
Control Box
Figure 2-2 illustratesthe control box with the control panel hinged open. Note the lexan (red plastic) cover secured over the meters to protect from electric shock.
[AWARNING 1 HAZARDOUS VOLTAGE! Touching unlnsulated llve parts Inside the control box can result In severe personal Injury or death. Relnstall the protective cover to prevent contact with bare, llve meter temlnals.
LEXAN COVER SECURED BY INSU OVER THE AC METER TERMINALS THIS COVER MUST ALWAYS BE REINSTALLED FOLLOWING SERVICE TO PROTECT FROM ELECTRIC SHOCK
