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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what is different between auto transformer and vriac

4 Answers  

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Please provide me detail cable voltage drop calculation

1 Answers  

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The capacity of the transformer is 20/25 MVA, Ratio is 132/11 KV, Vactor group YNyno. and impedance is 10.07%. As per the calculation the secondary current is 1312.2Amps. The maximum fault current the transformer should sustain is 13.030KA. How many times the transformer should sustain the maximum short circuit current of 13.030KA over a period up 1 Year. The transformer is repaired one & 10 Years old.

1 Answers  

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what are the different pre- commissioning tests performed on distribution transformer, power cable and switchgear?????

1 Answers   Reliance,

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what are the duty ratings in DG sets?

1 Answers   L&T,

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the need of star to delta anddelta to star

2 Answers  

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what is the use of pmg in exciter?

3 Answers  

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In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

6 Answers   Hindustan Unilever Limited,

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what you have to see after one week or month from the day of installation of transformer ?

0 Answers  

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What is the breakdown voltage?

13 Answers  

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how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

0 Answers  

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