Answer Posted / bharat kumar

Any device is rated depending on losses of the machine. In a transformer the losses are iron losses which depends on voltage and copper losses which depends on current so there are no losses which depend on power factor hence transformer is rated in KVA.

working principles of cf lamp,incandescentlamp and f lamp?

2314

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write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.

2619

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

2024

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describe the phenomena of vacuum interruption in C.B

1849

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what is the Pickup/drop off ratio in BCPU relays

4709

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i am studying in final year can i allowed for 23rd UES of Indian army

2177

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for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

2009

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what is star delta starter? how it works? give its control and power diagram.

2138

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What are the internal and external faults?

1156

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what will happen if there is a voltage leakage or current leakage in an electrical train

2067

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State the other types of Air Conditioners?

2130

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what kelvin's law ?

2168

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how does a submersible pump work..?

2024

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how to calculte capacitor range for single phase induction motors??pls tel

2174

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I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

2488

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