IMPORTANCE OF OPERATIONAL SEQUENCE IN O&M WORKS
INTERLOCKS:
ISOLATORS & CIRCUIT BREAKERS
(CEA R-45)
1
INTERLOCKS:
ISOLATORS & EARTH SWITCH
(CEA R-45)
2
Method & Sequence of connecting
earthing (Discharge leads):
&
disconnecting
the
WHEN CONNECTING:
FIRST CONNECT THE DISCHARGE CABLE TO THE GROUND &
THEN CONNECT THE OTHER END TO THE CONDUCTOR
WHEN DISCONNECTING:
FIRST DISCONNECT THE DISCHARGE CABLE FIXED TO THE
CONDUCTOR & THEN DISCONNECT THE OTHER END FIXED TO
THE GROUND
AFTER DISCONNECTING THE DISCHARGE ROD, NO ONE SHOULD
APPROACH / TOUCH THE CONDUCTORS.
4
APPLICATION OF LOCAL/PORTABLE EARTHING
5
DEMARCATION OF ISOLATED ZONE
6
APPLICATION OF ADDITIONAL EARTHS ON BOTH SIDES OF TIE
CIRCUIT BREAKER
7