Earth Leakage Relay and Grounding | Shindaiwa DG1000MI specs

7.3 Earth Leakage Relay and Grounding

Danger

:Electrical Shock

Ground the every earth grounding terminal to the earth as set out in the manual. If even one of all is unconnected by mistake or accident, it will be much more dangerous for human body than the –relay case, because leaking current inevitably goes through the body.

Even though all the bonnets of the loads have been grounded to the earth, the earth grounding terminal and the outer bonnet (canopy) grounding terminal should be grounded to the earth.

Grounding should be made after the engine is stopped.

Whenever the earth leakage breaker relay is activated, you should always repair the leaking place first of all.

The generator is provided with the earth leakage breaker relay to detect any leakage Produced due to such the trouble as insulation failure of the load while the generator is running and to cut off the circuit for protection against any accident such as electrical shock resulting from the trouble.

The specification of the earth leakage relay;

Rated Sensitive Current: 30mA (or below) (Grounding resistance: 500 or below)

Sensitive time: Within 0.1second

Different sensitivity relay is available to change. But, in the case, consult with our Engineering Section, because the value each of grounding resistance and grounding condenser will be different accordingly.

In the event bigger value sensitive relay (100, 200, 500mA, etc.) than 30mA will be used in the device, they are too high in value to prevent from electrical shock. Therefore, install each load with the 30mA (or below) relay separately.

The detailed information about sensitive current selection is prepared to give by the Article No.151.2 In Earth Leakage Breaker – Selection of The Wiring Regulations issued by Japan Electric Association.

7.3.1Grounding Work

The qualified electrician should perform the grounding of the following 3 points (500 or below).

The earth grounding terminal in the output terminal block

The Outer Bonnet (Canopy) grounding terminal of the generator The Outer Bonnet of the load

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DG1000MI specifications

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