Answer / guest

Because DC supply has polarity + and -

Everybody Knows What is ACB, VCB but anybody tell me what is ST?

7 Answers  

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bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

1 Answers  

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difference between earthing and grounding?

2 Answers   ABB, Bharti, L&T,

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what is the formula for calculating motor rating? Example: If we want to rotate a 1000 kg waight disc up to 100 RPM, which size motor will require?

1 Answers  

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how open delta PT works & what is its construction?

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5. What is PMG in Alternators?

11 Answers   L&T,

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advantage of motor design on higher power factor . normally motors are designed for .8 power factor. what is advantage of designing at .88 power factor

0 Answers  

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how can check the resistance of battery contact?

0 Answers   Cipla,

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Is it necessary to install Lighting Arrester on both side side (i.e HT and LT) of Transformer in a transmission substation? if yes Why on both side?

1 Answers  

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why 3 phase induction motor only need starter ? why not other motors need starter ?(like synchronous motor,single phase induction motors & their types) ?

3 Answers  

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If a line which is drawing approximatly 2100amps what should be earthing streep size(using galwanize streep)?

2 Answers  

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Does frequency change with increasing voltage i.e 220v to 11kv? explain if not?

6 Answers  

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