Answer / ibrahim+8801671121852

lighting arrester is used mainly for balancing the voltages
of any building. when lit comes from the sky the voltages of
any houses is rises. to aviod this rising voltage we used
lighting arrester. but if it passed 3.3kv it doesn't work.
or it would be burned.

why is it that the HT motors & motors having very low kW rating(<1kW) have windings connected in STAR, whereas the motors having in between kW ratings have DELTA connected windings??

5 Answers  

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In case you don't have coal and salt for earthing, how can you achieve good temporary earthing?

1 Answers   Focus Energy, NHPC, ONGC,

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Where there is voltage,there must be current.Is this right or wrong??

10 Answers  

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1 amp means-how many electron flow per second. ?

2 Answers  

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1amps current equal to howmany electrons to be flowed?

1 Answers  

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1-What is the difference between absorption factor and polarization factor in insulation resistance test in transformers? and why we inject until ten minutes to get polarization factor?

1 Answers  

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What do you mean by class of CTs and what is the meaning of cl 1.0, cl5P10, cl 10P10 CTs?

3 Answers  

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is it possible to test of bus bar in high rise building without completed full floor ?

0 Answers  

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How to decide DO set rating of Transformer?

0 Answers  

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. What is Electrical Life & Mechanical Life of Circuit Breaker? 2. What is Electrial Life & Mechanical Life of Magnetic Contactor? 3. What is RCD, RCCB & RCBO? 4. What is the Between defferance of RCD, RCCB & RCBO?

0 Answers  

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explain working principle of earth leakage relay

0 Answers   Divis Laboratories, SMIORE,

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WHY 6.6KV MOTORS ARE STAR CONNECTED AND WHY NOT DELTA CONNECTED,

15 Answers   Bhel,

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