MQ Power DCA-150SSJU, Руководство по эксплуатации и частям

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PAGE 24 — DCA-150SSJU — PARTS AND OPERATION MANUAL — REV. #3 (09/07/01)
DCA-150SSJU — GENERAL INFORMATION
DCA-150SSJU FAMILIARIZATION
Generator
The MQ Power Model DCA-150SSJU is a 120 kW generator
that is 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:
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Tachometer
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Water Temperature Gauge
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Oil Pressure Gauge
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Charging Ammeter Gauge
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Engine Speed Switch
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Auto/On/Off Engine Controller(if applicable)
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Pre-Heat Button
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Pre-Heat Lamp
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Key Ignition starter
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Fuel Gauge
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Panel Light
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Panel Light Switch
Generator Control Box
The “Generator Control Box” is provided with the following:
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Output Voltage Adjustment Knob
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Frequency Meter (Hz)
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AC Ammeter (Amps)
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AC Voltmeter (Volts)
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Ammeter Change-Over Switch
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Voltmeter Change-Over Switch
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Main Circuit Breaker 400 amps
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Over-Current Relay
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Voltage Selector Switch
Output Terminal Panel
The “Output Terminal Panel” is provided with the following:
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Three 240 output receptacles, 50 amp
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Two 120V output receptacles, 20 amp
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3 Circuit Breakers 240V @50 amps
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2 GFCI Circuit Breakers 120V@ 20amps
Engine
The DCA-150SSJU is powered by a 4 cycle, water cooled,
turbocharged John Deere 6081TF001 diesel engine. This
engine is designed to meet every performance requirement
for the generator. Reference Table 7, page 23 for engine
specifications.
In keeping with MQ Power's policy of constantly improving
its products, the specifications quoted herein are subject to
change without prior notice.
The basic controls and indicators for the DCA-150SSJU
generator are addressed on the following pages.
Electronic Governor System
The electronic governor system is made up of two parts, an
electronic controller that monitors frequency variation as the
load increases and decreases and an electronic actuator
that controls the engine throttle. The frequency is regulated
at ±0.25 to help protect sensitive equipment.
Engine
Open Delta Excitation System
The DCA-150SSJU 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 leads: A, B, C and D. During light loads, the
power to the
Automatic Voltage Regulator (AVR) is supplied
from the leads parallel connections of B&C. When loads
increase, the AVR switches and accepts power from leads
A&D. The output of leads A&D increase proportionally with
load.
This of adding the voltages to each phase provides
better voltage response during heavy loads.
The connections of the AVR to the AC output windings are
for sensing only. No power is required from these windings.
The open-delta design provides virtually unlimited excitation
current, offering maximum motor starting capabilities. The
excitation does not have a "
fixed ceiling " and responds
according the demands of the required load.