Answer Posted / lux

to limit the fault current entering into earth for safety
purposes..

Explain what are inter-poles and why they are required in a dc machine.

1040

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What is vaccum currcuit breaker.define with cause and where be use it device?

1060

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how to calculate energy of 3-phase motor?

1991

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what is the difference between directional & non directional earth fault with example please explain.

1796

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what is the difference b/w ground & virtual ground?

2264

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In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

3065

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

2769

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How much minimum insulation required between 11kv/3.3kv transformer windings?

2378

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how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...

2175

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What will be the current if the resistance total in a series circuit doubles?

1162

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dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

2005

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how to calculate maximum current

2271

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What is meant by short-pitched winding?

1133

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why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.

1392

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how to calculate singlephase motor efficiency?

2184

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