How Calculet The UPS AH In Load

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how much kn lightning arrestor is used in 11kv line

8 Answers   Power Grid,

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What is ST and specify its range of voltage.

0 Answers  

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what is the purpose for open delta connection in potential transformer

2 Answers  

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what is reactive power is it good or bad for a system

5 Answers  

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Natural frequency in the control system represents nature of a. Transient response b. Oscillations c. Overshoot d. Speed of responce

1 Answers  

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in an ac series circuit there are 30 bulbs are connected in a serial set.what will happen if one bulb is fused and we removed the bulb and reconnect with the remaining bulbs? (29 bulbs). will the brightness of other bulbs increase or not?

3 Answers  

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What are IR values and what it should be for coil and for insulator

0 Answers   GPSC Gujarat Public Service Commission,

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what is load cell? whrere its used ? how to measured?

2 Answers   Essar,

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give 5 differences between relay and contactor

1 Answers   Texas,

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Earth Is a very good conductor or very good insulator.? If a good conductor then why current donot flow through small piece f earth and if a good insulator then why we use it as return path in lines.???

6 Answers   L&T,

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I do wonder why current is present in neutral wire?i check single phase lead current feeding air conditioner...on its phase its current was 10A while same was 10A in neutral...as we know in neutral voltage is zero so if voltage is zero then how current appears on amp meter? my second observation is (just imagination)when I touch phase wire it give me shock but when i touch neutral nothing happens although as above its carrying current(amps) third but with same logic...as in simple Alternate current sine curve there is + and there is negative peak.means every time phase changing so how come every time same phase and same neutral stand (pardon for english mistakes)

1 Answers  

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