Answer / jafer

please clarify formula.

Why secondary of a CT in a power system acts as an open circuit after core saturation?

2 Answers  

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

0 Answers  

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what is the difference b/w permitivity and permeability

1 Answers  

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WHY DISEL GENRATOR SET SHUT DOWN IN OVER LOAD CONDITIONS

5 Answers   HMT,

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What is the difference between IGBT and TRIAC?

3 Answers  

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What is the gain of 1-s/1=s at 1 rad/sec?

3 Answers   NPCIL,

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if we have a industrial load of 400 kilowatts with 415 volt AC then how much total harmonic distortion (thd%) should be acceptable for steady power system.

0 Answers  

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how to test the ht machines?

0 Answers   ONGC,

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i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers

4 Answers   Hyundai,

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wat is meant by PX class in ct?

0 Answers  

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How to select the ratio of neutral ct? Is there any relation in between percentage impedance and neutral ct ratio ?

1 Answers  

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can a generator with 15AH specified battery for starting can be connected to a battery of greater capacity?

2 Answers  

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