single phase for 230 then why three phase are 440 volt

4 Answers   ACIL,

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Greeting to all members, How to calculate spill current when we have different ratio CT and Class for REF(Low Imp) I have 500/1A 5P20 @line side n 400/1A CL.X @ Neutral.

0 Answers   DEWA,

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1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

0 Answers  

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what is the difference between earthed and unearthed cable?

24 Answers   Cords Cable, Essar, Torrent Power,

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how much amps can i connect for 4core 120mm armade cable

2 Answers  

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is there or does RCCB work for single phase connection?

2 Answers  

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wht is this amps in power consuption and how can we convert that into consuption hours ? i am a sales executive of a energy saving lamps .

5 Answers   KSEB,

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what is the meaning of impedance protected in instrument cooling fan

0 Answers  

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What is the approximate percentage of Si content in transformer core(CRGO-Cold Rolled Grain Oriented)? Why it is kept so low?

1 Answers  

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what is the formula for calculation of sac?

4 Answers   TCS,

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How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

0 Answers  

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1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

0 Answers   ABC,

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