Earth Leakage Relay And Grounding - Shindaiwa DG25MK Owner's And Operator's Manual

For 1-phase load:
Terminal voltage is 400/440 V [200/220 V] (50/60Hz).
* The values in brackets are for when set to 200/220V.

7-3. Earth Leakage Relay and Grounding

WARNING : ELECTRIC SHOCK
Ground the every grounding terminal to the earth as set in the manual.
If even one of all is unconnected by mistake or accident, it will be
much more dangerous for human than the NO-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
bonnet grounding terminal should be grounded to the earth.
Grounding should be made after the engine is stopped.
Whenever the Earth leakage 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: 500Ω or below)
Sensitive time: Within 0.1 second.
(1) Grounding Work
The qualified electrician should perform the grounding
of the following 3 points(500Ω Ω Ω Ω or below).
The Bonnet grounding terminal of the generator.
The Earth leakage terminal of the generator.
The Bonnet of the load.
< Note >
In the event you cannot ground the generator to the earth,
consult with the authorized distributor or our
engineeringsection.
(2) Operation Check
WARNING : ELECTRIC SHOCK
Before turning the circuit breaker to ON position, ensure that the breaker or the switch
of loads are positioned to OFF.
Operate the circuit breaker, well-communicating with the electrician by the load side.
R S T
Load Load
18
O
Earth Grounding
Terminal
Bonnet Grounding
Terminal
Grounding Rod