Single point ground on a ct circuit
Single point ground on a ct circuit
(OP)
After much on the job discussion, what is the primary reason to have just a single point ground on a CT circuit?
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Single point ground on a ct circuit
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RE: Single point ground on a ct circuit
Steadfast rule for secondary grounds on VT and CT circuit is the secondary circuit must have a ground reference and it should only be grounded at one point.
RE: Single point ground on a ct circuit
An even more serious issue is related to scottf's post. In the event of a major system fault, there may be high ground fault currents that may cause voltage gradients. A voltage gradient between multiple ground points of a protection circuit may cause unintended results such as a failure to trip or a false trip. A voltage gradient between multiple ground points may cause unintended currents in CT metering or protection circuits.
Bill
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"Why not the best?"
Jimmy Carter
RE: Single point ground on a ct circuit
RE: Single point ground on a ct circuit
Ground faults on secondary wiring are possible. When there is a ground fault on any of the two wires then both wires are grounded
and there is no open circuit in the secondary circuit.