Answer / jagjeet singh solanki

power transformer is used at generating station and its rating is above 200kva but distribution transformer is used in distribution system to step down the transmisson voltage to distribution voltage and its rating is about 200kva it is kept in operation all the 24 hours a day whether they are carring any load or not.

how the capacitance is caluclated if the load is varying to keep the power factor constant(above0.95)

1 Answers  

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how to convert lv line to hv line and viseversa, any losses will occur during this process

0 Answers   Jindal,

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In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

0 Answers  

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We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 Answers  

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Please tell me what is the difference between online UPS & OFF line UPS?

2 Answers   HAL,

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What is Magnetic Current Test of Transformer.

2 Answers  

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why -48 volts dc used in telecommucation

0 Answers  

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Should transformer earthing pit, to be connect to earthing mat in Substation

4 Answers  

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why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer?

3 Answers  

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What is the difference between phase current & line current, how both can be measured in star and delta system

9 Answers   Doshion, MIT,

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How to test transformer

1 Answers  

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What happens on the secondary of a 33kV/11kV when one phase of the primary fuse blows?

3 Answers  

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