Why neutral has to switch on-off with phase in TN IT TT systems i.e neutral should be taken as fourth pole

1 Answers  

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How much current will a 5 HP delta connected motor at no load will take?Is tat need a starter

2 Answers   GRB,

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what are the difference between protection class CT and Class PS CT

13 Answers  

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Why LT cables are not sized based on short circuit capacity.

3 Answers  

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As per principle we say in three phase supply ,the voltage is producing by phase angle between two phase so two phase is needed means then why we using three phase ?

2 Answers  

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1.what is use of isolation transformer. 2.Differance between KWH,KVAH,KVARH,KVA. 3.Main use of the CT and PT.

1 Answers  

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what is the difference between energy efficient and high efficiency motors

2 Answers  

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can a generator with 15AH specified battery for starting can be connected to a battery of greater capacity?

2 Answers  

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What is DPR relay, And what for??

2 Answers   Engro,

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Why 5kv megger used to megger 6.6kv motor or 33kv transformer why not 500v?

2 Answers  

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What type of input will the OLTC indicator will accept or what type of output the OLTC will produce to monitor it's position at remote location.

1 Answers   amps,

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difference between microprocesser and microcontroler

1 Answers   HAL,

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