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PAGE 24 — DCA-125SSJU SERIES (STANDARD) — PARTS AND OPERATION MANUAL — REV. #4 (06/03/03)
The definitions below describe the controls and functions of
the DCA-125SSJU Series "
Generator Control Panel
"
(Figure 5).
1. Main Circuit Breaker – This three-pole, 300 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:
z
Over-Current Relay
z
Voltage Rectifer
z
Starter Relay
z
Engine Controller (Computer Controlled)
z
Current Transformer
z
Voltage Selector Switch
Remember the
overcurrent
relay
monitors the current
flowing from the UWVO output
terminals to the load.
In the event of a short circuit or
over current condition, it will
automatically trip the main 250
amp breaker.
NOTE
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).
Figure 5. Generator Control Panel
DCA-125SSJU SERIES — GENERATOR CONTROL PANEL