Multiquip DCA180SSK manual DCA-180SSK General Information

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

Control Box

The “Control Box” is provided with the following:

Main Circuit Breaker 500 amps

Over-Current Relay

High Idle Adjust Trimmer

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 AutomaticVoltage 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.

PAGE 26 — DCA-180SSK — PARTS AND OPERATION MANUAL — REV. #3 (06/11/09)