Answer / k.prakashchandra

Now Freon 22 is being used and it will be discontinued after
the year 2013 as it is also found to be harmful to ozone layer.

Answer / arun

the sf6 gas is used during fult occur in a.c sub station

I have a 5KVA UPS. Total load to be connected almost 3KW. Ordering a battery pack with capacity of 1920VAh. How long will the backup time be?

1 Answers  

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If I need to purchase a step-down transformer (from three phase 33kV 50Hz to 400/230V), what additional information do I need from the main supply power line?

1 Answers   MahaDiscom,

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what is the difference between Miniature circuit breaker & motor control circuit breaker ?

4 Answers  

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What is IDMT? What is the principle

3 Answers  

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Why winding temperature ct placed in B-Phase of the transformers?? 

3 Answers  

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What is the function of the auto reclosure relay?

1 Answers  

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which one is rotating transformer-single phase induction motor or 3 phase squirrel cage motor?

1 Answers  

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how does the thyistor work in dc drive?

0 Answers  

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why do we prefer alternating current in india where as in USA prefers DC?

3 Answers   Bhel, GMR, Texmo,

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A low wet bulb temperature indicates

0 Answers   Caterpillar,

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Power systems

0 Answers   LB Engineering,

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why we use REF and Differential Protection in one transformers?my doubt is both protections are operated in internal fault only.why we want to use 2 protections?please clarify.

7 Answers  

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