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26 September 2018

18.Main switchboard safeties

September 26, 2018 Posted by AK No comments
a.Ebonite Rod.
b. Rubber pad infront of switchboard.
c. Dead-front type switchboard.
d. 0.6 meter gap behind the switchboard.
e. Fuse
f. Circuit Breakers.
g. Earth Fault indicators.
h. Panel doors are earthed.
i. No water, steam or oil pipelines to pass in its vicinity.
j. Undervoltage Relay
k. Reverse Power trip.
l. Preferential trip.
m. Overcurrent trip
n. Arc Chute
o. Short-circuit trip.
p. CT and other instruments are earthed
q. interlock provided so that when open the door the supply will automatically disconnected
r. Fused isolators are provided.

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