Multiquip DCA-70SSJU Series Generator Control Panel, Relay monitors the current, Amp breaker

DCA-70SSJU SERIES — GENERATOR CONTROL PANEL

Figure 5. Generator Control Panel

The definitions below describe the controls and functions of the DCA-70SSJU Series "Generator Control Panel" (Figure 5).

1.Main Circuit Breaker – This three-pole, 175 amp main breaker is provided to protect the UVWO output terminals from overload.

2.AC Ammeter – Indicates the amount of current the load is drawing from the generator per leg selected by the ammeter phase-selector switch.

3.Ammeter Change-Over Switch – This switch allows the AC ammeter to indicate the current flowing to the load connected to any phase of the output terminals, or to be switched off. This switch does not effect the generator output in any fashion, it is for current reading only.

4.Voltmeter Change-Over Switch – This switch allows the AC voltmeter to indicate phase to phase voltage between any two phases of the output terminals or to be switched off.

5.Voltage Regulator Control – Allows ±15% manual adjustment of the generator’s output voltage.

6.Frequency Meter – Indicates the output frequency in hertz (Hz). Normally 60 Hz ±1 Hz .

7.AC Voltmeter – Indicates the output voltage present at the UVWO terminals.

Located behind the generator control panel is the Generator Control Box. This box contains some of the necessary electronic components required to make the genertator function.

The “Control Box” is equipped with the following major components:

Over-Current Relay

Voltage Rectifer

Starter Relay

Engine Controller (Computer Controlled)

Current Transformer

Voltage Selector Switch

	Remember the overcurrent
	relay monitors the current
	flowing from the UWVO output
NOTE	terminals to the load.
	In the event of a short circuit or
	over current condition, it will
	automatically trip the main 250
	amp breaker.

To restore power to the UWVO output terminals, press the reset button on the overcurrent relay and place the main circuit breaker in the closed position (ON).

PAGE 24 — DCA-70SSJU SERIES — OPERATION AND PARTS MANUAL (STD) — REV. #5 (06/03/03)