General Information

Generator

This MQ Power generator (Figure 3) is 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 Operating Panel

The “Engine Operating Panel” is provided with the following: Tachometer

Oil Pressure Gauge

Water Temperature Alarm Lamp

Oil Pressure Alarm Lamp

Charging Ammeter Gauge

Pre-Heat Lamp

Panel Light

Panel Light Switch

Starter Switch

Water Temperature Gauge

Fuel Gauge

Fuel Filter Water Level Alarm Lamp

Generator Control Panel

The “Generator Control Panel” is provided with the following: Frequency Meter (Hz)

AC Ammeter (Amps)

AC Voltmeter (Volts)

Ammeter Change-Over Switch

Voltmeter Change-Over Switch Voltage Regulator

3-Pole, 60 amp Main Circuit Breaker

“Control Box” (located behind the Gen. Control Panel)

•Automatic Voltage Regulator

•Current Transformer

•Over-Current Relay

•Starter Relay

•Voltage Selector Switch

Output Terminal Panel

The “Output Terminal Panel” is provided with the following: Two 250 VAC output receptacles (CS-6369), 50 amps Two auxiliary circuit breakers, 250V @50 amps Two 125 VAC output receptacles, (GFCI), 20 amps Two GFCI circuit breakers, 125V@ 20 amps

Five output terminal lugs (3Ø power) 8 Fuses

Open Delta Excitation System

This 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 of the open delta A, B, C and D. During steady state loads, the power from the voltage regulator is supplied from the parallel connections of A to B, A to D, and C to D. These three phases of the voltage input to the voltage regulator are then rectified and are the excitation current for the exciter section.

When a heavy load, such as a motor starting or a short circuit occurs, the automatic voltage regulator (AVR) switches the configuration of the open delta to the series connection of B to C. This has the effect of adding the voltages of each phase to provide higher excitation to the exciter section and thus better voltage response during the application of 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.

Engine

This generator unit incorporates an ISUZU BV-4LE2 diesel engine.This engine is designed to meet every performance requirement for the generator. Refer to Table 2 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.

Electric Governor System (OPTION)

The electric governor system controls the RPMs of the engine. When the engine demand increases or decreases, the governor system regulates the frequency variation to ±.25%.

Extension Cables

When electric power is to be provided to various tools or loads at some distance from the generator, extension cords are normally used. Cables should be sized to allow for distance in length and amperage so that the voltage drop between the generator and point of use (load) is held to a minimum. Use the cable selection chart (Table 6) as a guide for selecting proper extension cable size.

page 16 — DCA25SSIU3 (with MLT25 series) • operation and parts manual — rev. #1 (01/24/13)

dca25ssiu3 specifications

The Multiquip DCA25SSIU3 is a powerful and reliable generator that exemplifies performance and efficiency in portable power solutions. As part of Multiquip’s DCA series, this generator is designed with a focus on providing optimal power for construction sites, events, emergency backup, and various industrial applications.

One of the key features of the DCA25SSIU3 is its robust 25 kVA output, which is capable of handling significant loads with ease. This makes it suitable for powering multiple tools and equipment simultaneously, ensuring that operators can complete their tasks without interruption. The generator is equipped with a durable and quiet-running engine, which contributes to its reputation for reliability and ease of use.

In terms of technological advancements, the DCA25SSIU3 incorporates advanced inverter technology. This feature ensures that the output power is stable and clean, making it ideal for sensitive electronic equipment. This technology not only enhances performance but also increases fuel efficiency, allowing for longer operational periods between refueling.

Another notable characteristic of the DCA25SSIU3 is its compact design, coupled with a user-friendly control panel. The generator is designed to be portable, with integrated lifting points that make it easy to transport across various job sites. The control panel features clear indicators for easy monitoring of power output, fuel level, and operational status, empowering users to operate the generator with confidence.

Moreover, the DCA25SSIU3 is built with durability in mind. It features a rugged enclosure that protects vital components from the elements, including rain, dust, and debris. This design ensures that the generator can withstand tough job site conditions while providing reliable power.

In terms of safety, the DCA25SSIU3 is engineered with multiple protective features, including low oil shutdown and overload protection, which helps to prevent damage to the generator and connected equipment.

Overall, the Multiquip DCA25SSIU3 stands out as a robust, efficient, and reliable choice for those seeking a dependable portable power solution that meets the demands of various environments and applications.