Answer Posted / j.kesavan

please slect your cable in 11kv py side how much current
check first after you slect your ht cable.

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

1154

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What is current & voltage ? Voltage perform at any load without current or not?

1371

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we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

1541

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How to check the Bushings of the transformer?

1263

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how to check ac servo motor

1714

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A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

764

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why magnetising curve not start with zero voltage?

1839

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What is the difference between rated and per unit in transformer?

1701

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If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

1836

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what curve and rateing would you use for a three phase 0.75kw motor?

1563

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What are the main advantages of bode plot?

691

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Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!

1302

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How do u analyse protection fault when vcb tripping on load

1161

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1) why a dg set shows variation of power factor and load when synchronised with other dgs? 2)Why the load sharing is not become equal in all dgs?. 3)When a dg set will not run on auto start?

1533

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

1701

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