Wat is meant by OLTC?

1 Answers  

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define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.

4 Answers   Siemens, VPEC,

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What is duty cycle and protection class?

4 Answers   SISL,

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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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what is negative and zero impedance in 3 phase induction motor ??

0 Answers  

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Is an SCR semi controlled device?

4 Answers   IOCL,

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what is buscoupler adopter panel????

5 Answers  

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when we start the tube light, then it takes initially 1100 volt, after glow it takes 120 volt?(when we give 220 volt a.c.)

3 Answers  

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what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?

4 Answers   NPTC, NTPC,

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What is Isolation Current transformer and what purpose to use it in REF relay ?

1 Answers  

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why capacitor do not switch ON the DG power? (I had checked, capacitor ON in DG power that time current rating was reduced.)

1 Answers  

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how to calculate the megger values for motors and cables?

2 Answers   Adhunik,

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