Why do we apply both Differential and REF (HV and LV) protection schemes on YNyn configuration of a transformer?

0 Answers   WCC,

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what is the difference betwteen overcurrent and short circuit fault?

3 Answers  

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I've descovered that when the earth wire in a domestic electrical installation is not connected back to the board (ground) a voltage of between 9-24v is is found to be present in the earth wire. When connected at the board there is no voltage - is this normal and why does it happen?

3 Answers  

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what are tpes of insulaors& its uses

1 Answers   ABC,

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if i have to use 14 kw what size of power cable can i use and size of earth cable also.

2 Answers  

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How many earthings are required for commissioning the Transformer?

14 Answers   Dalmia Group, HSL,

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wat is the first thing dat is needed, 2 lay a cable in some area??

0 Answers  

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Difference Between Differential Relay and Restricted Earth Fault Relay of Power Transformers

1 Answers   KSEB,

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What is AVR in Generators and How is it working.

4 Answers  

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What is Tachometer used to measure?

0 Answers   Blue Star,

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150 hp moter how many kwh in 1 hour and what forfula 3 phase kwh.

5 Answers   College School Exams Tests, CPCL, Syncom, Thermax,

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Explain how you intend to work under pressure to meet up with deadline target?

0 Answers  

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