how to calculate restraing current and operating current for differential protection if 20 mva transformer is OLTC 33 kv/11 kv ? and what should be the type and ratio of CT?

2 Answers   L&T, OPS,

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1)Explain why the cradle guard is used on railway crossing in overhead line construction?

0 Answers  

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where used impendence relay?

3 Answers  

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How to configure the drives in PLC, through Profibus commnication. And to how to address it?

0 Answers  

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what is the operating principle of contactor(power).along with disection?

3 Answers   NASA, Tech Mahindra,

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Ohm's law applicable for semi-conductors?

4 Answers  

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How much DC or AC Current that a Human Body withstand for Electrical Shocks?

4 Answers   Suzlon,

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the resstance of a thermistor is 5000 ohm at 25degreeC and coefficient is .04/degCel. A measurement with lead resitance of 10 ohm will cause an error of

1 Answers   GATE,

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We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

1 Answers  

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how many transformer

8 Answers   Dalmia Group, TATA,

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in 6.6 kv vaccum circuit breaker vaccum bottole vaccum capacity ????

0 Answers   Divis Laboratories,

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The size and construction of bushings in a transformer depend upon?

0 Answers  

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