John Deere Products & Services Portable Generator DCA70SSJU4i Manuel D’Utilisation

This generator (Figure 4) 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.

The “Operating Panel” is provided with the following:

 

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ECU Controller

 

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Gauge Unit Assembly

• Oil Pressure Gauge
• Water Temperature Gauge
• Charging Voltmeter
• Fuel Gauge
• Tachometer

 

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Panel Light/Panel Light Switch

 

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Hour Check Button

 

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Auto Start/Stop Switch

 

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Fuel Leak Detected Alarm Lamp

The “Control Panel” is provided with the following:

 

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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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Voltage Regulator

 

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3-Pole, 200 amp Main Circuit Breaker

 

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“Control Box” (located behind Control Panel)

• Automatic Voltage Regulator
• Current Transformer
• Over-Current Relay
• Starter Relay

The “Output Terminal Panel” is provided with the following:

 

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Three 120/240V output receptacles (CS-6369), 50A

 

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Three auxiliary circuit breakers, 50A

 

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Two 120V output receptacles (GFCI), 20A

 

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Two GFCI circuit breakers, 20A

 

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Eight output terminal lugs (3Ø power)

 

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Ground lug

 

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Battery Charger (Option)

 

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Water Heating Element (Option)

 

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Camlock Connector (Option)

 

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600 VAC Output, Auto-Transformer (Option)

Each generator is equipped with the state of the art 

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.

This generator is powered by a 4 cylinder, 4-cycle water 

cooled, direct injection, turbocharged, air cooled and EGR 
John Deere

 4045HFG92

diesel engine. This engine is 

designed to meet every performance requirement for the 

generator. Reference 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.

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%. 

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 8) as a 

guide for selecting proper extension cable size.