Multiquip dca-70usj Ammeter phase-selector switch, Only, Starter Relay Current Transformer

DCA-70USJ — GENERATOR CONTROL PANEL

Figure 6. Generator Control Panel

The definitions below describe the controls and functions of the DCA-70USJ Generator Control Panel (Figure 6).

1.	Main Circuit Breaker – This three-pole, 175A main
	breaker is provided to protect the the U,V,andW Output
	Terminal Lugs from overload.
2.	Frequency Meter – Indicates the output frequency in

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

The Control Box is equipped with the following major components:

hertz (Hz). Normally 60 Hz.

3. AC Ammeter – Indicates the amount of current the load

is drawing from the generator per leg selected by the

ammeter phase-selector switch.

4. 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.

■Over-Current Relay

■Voltage Rectifer (AVR)

■Starter Relay

■Current Transformer

■Voltage Selector Switch

NOTE

Remember the overcurrent relay monitors the current flowing from the U,V, and W Output Terminal Lugs to the load.

5.	ACVoltmeter – Indicates the output voltage present at
	the U,V, and W Output Terminal Lugs.
6.	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.
7.	Voltage Regulator Control – Allows ±15% manual
	adjustment of the generator’s output voltage.

In the event of a short circuit or over current condition, it will automatically trip the main breaker.

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

DCA-70USJ — OPERATION AND PARTS MANUAL — REV. #0 (09/16/04) — PAGE 21