Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??

4 Answers  

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Why voltmeter is not connected in seris & ammeter connected in parallel ?

5 Answers  

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Can the same motor be operated in both direction ?

12 Answers  

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WHY WE NEED AUTO TRANSFORMER,WHERE WE CAN USE?

5 Answers   L&T,

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why r use the wave taper in the substation ?

2 Answers   L&T,

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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 EOL?

1 Answers  

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why only exciting current is shown not primary current in transformer???

0 Answers  

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What's voltage?

1 Answers   Pakistan Atomic Energy Commission PAEC,

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why transformer capacity is called KVA and motor capacity is called HP/KW? Why transformer capacity cant call HP/KVA?

5 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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Differenc between the resistance and resisters?

5 Answers  

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