why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 Answers   ABB, ONGC,

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How can I calculate the fault level of a transformer. 1. If fault is 3phase fault 2. If fault is 1phase fault 3. If fault is 2phase fault Dear all geniouses, can you help me by giving answer. If anybody want to send something then mail me at "msalam_shahin@yahoo.com"

0 Answers  

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what is the use of vcb & isolator in substation?

0 Answers  

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how to select the cables based on amps ratings ? how to calculate the amps and how to select the cable size

1 Answers   JV Electricals,

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In induction machine when the load increase the current will increase .why? what is the relation ship between the sleep and current drown by stater?

1 Answers  

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name the types of insulatter?

5 Answers  

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i Have 1000kva 11/.4 kv voltemp make t/f Its a 2 year old. i wants to known how much iron losses & copper loses during no load condition.

2 Answers  

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List out the the types of Mounting Light fixture?

0 Answers   HLL,

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what is AVP?

2 Answers  

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what is the diff between mcb and vcb

3 Answers  

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how we calculate torque ? how we improve it ?where torque will either motor or generator ?

0 Answers   Reliance,

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what is XLPE cable?

2 Answers   Essar,

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