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hot sequence on ct metering

hot sequence on ct metering

hot sequence on ct metering

(OP)
why is cold sequence not allowed on ct metering per power companies/? is it a safty issue or tampering deterent,thanks-bob

RE: hot sequence on ct metering

You never want to leave energized ct wiring "open" as the induced voltages will seek ground, causing damage to equipment.

Normally, cold / hot sequencing pertains to feed through meters, not ct metering.

Cold = main disconnect ahead of meter
Hot = Main disconnect after meter

For large voltages / loads, you would not want to pull the in-line meter, without first shutting off the incoming power.

Rick Miell

RE: hot sequence on ct metering

cold sequence is now more common in the USA. Hot sequence I would suspect is a tampering deterent more than anything.

RE: hot sequence on ct metering

(OP)
thanks guys.in xcel area we tried cold sequence metering but they backed off ,with the exception of 480 3 phase is cold sequenced.fault currents in excess of 10,000 amps is uncommon in residential application .hence, the hot sequence . ct are to be  hot sequenced,ive been told both reasons as you and rick have spoken of.but in the event of a power failure,would not the ct be in a cold sequence mode? THANKS--BOB

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