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Merlin Gerin YSF6 Circuit Breakers

We have a bank of Merlin Gerin YSF6 circuit breakers, two incomers eight feeders separated by a bus section switch. The two incomers feed onto the busbars and the feeders take the supply from the busbars and supply to the outgoing circuits. The drawing for the layout shows the Incomers VT's on the incoming 'live' side of the breaker before the busbars. The drawing does not show VY's on the outgoing feeders. As the circuit breakers are identical, would the VT's on the outgoing feeders be after the busbars and circuit breakers? TIA

Reply to
BIGEYE
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Yes, VT location should be after the breaker and bus bar . That is towards the line side of the out going feeder breaker.

P.SUBBARAYALU SAUDI ARABIA

Reply to
subba

You do not say what voltage level you are talking about, but if you are talking about "Distribution Voltages", the feeder VTs will be next to the outgoing cable connections.

However if they are not shown on the diagram do they actually exist ? In the UK it would be fairly unusual to have VTs on the outgoing circuits unless there was tariff metering involved.

John Rye

Reply to
Eur Ing John Rye

Distribution voltage is 11 kV, the switchgear has VT cubicles at the back of the switchgear.

Reply to
BIGEYE

I have to agree with an earlier post - are you sure there are VTs on the feeders. Generally VTs would not be much value on the feeders if you already have them on the incomer. The voltage difference wouldn't be worth measuring. The only time they may be worthwhile is if you are running with an open bustie and intend to backfeed the bus. Even then there would have to be a considerable difference for it to be worthwhile worrying about.

Metering and protection concens may invalidate the above, but generally CTs would be sufficient for most instances.

Lumberjack_steve

Reply to
stevenrigoni

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