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PAGE 26 — DCA-180SSK — PARTS AND OPERATION MANUAL — REV. #3 (06/11/09)
DCA-180SSK — GENERAL INFORMATION
DCA-180SSK FAMILIARIZATION
Generator
The MQ Power Model DCA-180SSK is a 144 kW
generator
that has been designed as a high quality portable (requires
a trailer for transport) power source for telecom sites, lighting
facilities, power tools, submersible pumps and other
industrial and construction machinery.
Engine Control Panel
The “Engine Control Panel” is provided with the following:
Tachometer
Water Temperature Gauge
Oil Pressure Gauge
Charging Ammeter Gauge
Engine Speed Switch
Pre-Heat Button
Pre-Heat Lamp
Emergency Stop Button
Battery Switch
Ignition Key Switch
MPEC Module (on some models)
Generator Control Panel
The “Generator Control Panel” is provided with the following:
Output Voltage Adjustment Knob
Frequency Meter (Hz)
AC Ammeter (Amps)
AC Voltmeter (Volts)
Ammeter Change-Over Switch
Voltmeter Change-Over Switch
Panel Light
Panel Light Switch
Pilot Lamp
Output Terminal Panel
The “Output Terminal Panel” is provided with the following:
Two 120V GFCI receptacles, 20 amp
Three 240/139V output receptacles, 50 amp
Two 120V input receptacles, 20 amp
3 Load Circuit Breakers 265V @65 amps
2 Load GFCI Circuit Breakers 265V@ 20amps
Microprocessor Controlled Alarm System
The DCA-180SSK generator is equipped with various alarms
and LED status indicators. These alarms and status indicators
are provided to add safety to the generator when operating
under normal conditions. The DCA-180SSK generator is
designed to shutdown in the event of low oil, high coolant
temperature, low battery and other operation conditions that
may cause severe damage to the generator.
Open Delta Excitation System
The DCA-180SSK generator is equipped with the state of
the art "
Open-Delta
" excitation system. The open delta
system consist of an electrically independent winding wound
among stationary windings of the AC output section.
There are four connections: A, B, C and D. During steady
loads, the power to the
Automatic Voltage Regulator
(AVR)
is supplied from the parallel connections of A to B, A to D,
and C to D. These three phases are rectified and are used as
the current for the exciter section.
During a heavy load, such as motor starting, the AVR
switches the configuration of the Open-Delta to the series
connection B to C. This has the effect of adding the voltages
of each phase to provide better voltage response during heavy
loads.
The connections of the AVR to the AC output windings are
for the sole purpose of sensing. No power is required from
these windings.
The open-delta design provides virtually unlimited excitation
current due to its independent power supply offering maximum
motor starting capabilities. The excitation does not have a
"
fixed ceiling
" and responds according the demands of the
required load.
Control Box
The “Control Box” is provided with the following:
Main Circuit Breaker 500 amps
Over-Current Relay
High Idle Adjust Trimmer