Hi there can anybody help with the following question

State the main requirements of a protection...

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Hi there can anybody help with the following question

State the main requirements of a protection CT and an instrument CT.

A 400 A circuit is to be protected by a CT and relays. The relays present a 2.5 VA burden. If the setting is 20% and there is saturation of 50% at 20 x current setting, specify a suitable CT.

Many thanks

Robert · Accepted Answer

Main requirements of Protection CT 
 Protected equipments are required 
 Maximum fault level should be fixed for stability. 
 Transformer should be sensitive. 
 Plot wire resistance must be used. 
Main requirements of Instrument CT are;

Hi there can anybody help with the following question State the main requirements of a protection CT and an instrument CT. A 400 A circuit is to be protected by a CT and relays. The relays present a...

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