4 - 4 EARTH LEAKAGE RELAY and Grounding
A WARNING
ELECTRIC SHOCK by leak can kill.
■ Improper grounding may lead to death due
to electric shock. Because the device for
leakage protection does not operate
effectively.
* Grounding terminal for the earth leakage relay,
case grounding terminal and case of the load are
grounded.
(1) Description of the device
The machine is provided with an earth
leakage relay to detect any leakage
produced due to such trouble as insulation
failure of the load during operation and to
cut off the circuit for protection against
any accident such as electrocution
resulting from the trouble.
The current sensitivity of this relay is 30 mA.
Improper handling of the relay may lead to unsafe condition in comparison with that does
not use the relay.
To ensure further safety, install a leakage relay for each load at the position near the load.
EARTH LEAKAGE RELAY
3-phase ( ^ )
•
PILOT LAMP
1—phase
О
О
RESET BUTTON
TEST BUTTON
_____ •
-
30
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