Answer Posted / kamal ghasemi

When the line isolator is open and the voltage from cvt to
distance relay is absent and the bus isolator and breaker
are closed; if a fault occurs between the line isolator and
the ct a feature in dist. relay called stub protection
which is an instatanious none diretional oc relay sends
trip command to breaker.This is usually in test and service
conditions.

Define peak time.

1144

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how we provide neutral earth on synchronising panel as per electrical standards?

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what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

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What the main causes of transient interruptions on Over-Head Distribution Lines?

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why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

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What conditions are required for transformer to operate at low frequencies ?

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wht is embedded systems? what is new inthis field?

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briefly explain the main blocks found in a microprocessor based system

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When MICC cables used ?

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What type of wiring series or parallel is used for conventional and addressable type FAS & why?

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What is the different types of cable & current capacity of cable

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