How many relays used to detect the inter phase fault?
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<<This question is answered on the assumption that a three-line system is being used.>>
The answer is three.
Three relays are used to detect the inter phase fault of a three-line system.
A relay is used when there is a need to control a circuit with either high voltage or power using a low voltage circuit. Because they are more resistant to a nuclear reaction than semiconductors, they find good use in safety critical logic. Choosing a relay for a particular application requires in-depth valuation of many factors.
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"To detect the inter phase fault, two relays are used for a three-line system. When there is a need to control a circuit with either high voltage or power using a low voltage circuit, we use one relay. This protective "relay circuit" responds to "interphase faults".
For the complete protection of the power system, we should use three phase fault relays with two earth fault relays. It covers the entire zone of operation."
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