ABB OHB Installation, Service And Maintenance page 28

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Outdoor SF6 Circuit Breaker - Type
OHB: Instruction for Storage,
Installation, Service and
Maintenance
Original Title: ABB Breaker
Uploaded by Sampath Kumar
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7.9 Earthing:
Fig. 20 Details of Earthing
Carry out earthing by bolting the
earthing conductor on the earthing
point.
Be sure to clean & degrease the area
around the hole & on completion of
assembly, cover the joint with Vaseline
again.
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7.10. Auxiliary circuit
connection:
Before opening the operating
cover make sure that the circui
open and the closing springs d
The connection of the circuit-br
auxiliary circuits must be made
terminal box mounted inside th
mechanism box.
Outside the circuit-breaker the
run inside appropriately earthe
or ducts.
The minimum cross-section of
used for the auxiliary circuits m
less than that used for internal
They must also be insulated fo
voltage.
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