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Topic Title: medium voltage integral earthing
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Created On: 13 March 2013 02:01 AM
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 13 March 2013 02:01 AM
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jackdaniel

Posts: 69
Joined: 29 November 2012

Guys,

I have googles about integral earthing, but i still dont understand, can somebody explain to me.

is it means the earthing can be transfer either to feeder earth or busbar earth.
 24 March 2013 06:10 PM
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ArthurHall

Posts: 735
Joined: 25 July 2008

Integral earthing is a system for earthing HV plant via the switchgear.
The main earthing types are;
Transfer earthing, the circuit breaker is transferred to another position ie BB earth or circuit earth and closed.
Extension earthing, a device is fitted to the circuit breaker which is then racked in and closed.
Portable earthing, prods are inserted into the spouts after being connected to earth.
Integral earthing, built in earth switches.

Get your self a copy of the HSE booklet 'Keeping electrical switchgear safe' its about a tenner and describes all the basics.
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