В Grounding of the load equipment
As in the case of the machine, execute grounding work on the load equipment case.
Provide the grounding rod to satisfy the grounding resistance which conforms to the
local rule.
[Note] :
The installation of a leakage relay on the machine can not become a reason for
elimination of the need for the load side grounding.
The load side grounding is indispensable for earliest possible detection of any
leakage caused in the generator. The absence of such grounding requires any leakage
to be detected by current flowing through the human body and is very dangerous
because the sensitivity of leakage relay provided on the machine is not sufficient for
detection of such current.
В Precaution in grounding
Refer to Г4.3 (3) Precaution in grounding See p.21 J
BOperation check
For safety reasons, check on the operation of the leakage relay
at the startup of the machine according to the procedure
described below:
Ф Startup the machine according to ^5-2 Startup See p.26J .
(2) Make sure that all breakers of the load side are "OFF".
© Set the circuit breaker to "ON".
© Press the TEST button on the leakage relay. If this causes the
LEAK lamp (red) on the leakage relay to go on and the
breaker to be activated, the leakage relay can be regarded as
operating normally.
© Press the RESET button and return the breaker to the "OFF"
position. This allows the breaker to be turned to "ON" again.
* The leakage relay, once it is activated, holds its activated state
until the RESET button is pressed or the machine is stopped.
(3) Action for operation of the leakage relay
When the leakage relay is activated, then stop the engine and
measure the insulation resistance several parts and repair the
leak spot before restart the engine.
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