Answer / master rapper

a closing resistor is attached to the poles of a circuit breaker to provide damping effect to over-voltage due to switching transients. It simply provides additional protection to the insulation/dielectric of the circuit breaker.

Answer / william wright

Closing resistors are also intended to allow shunting of
over-voltages power surges that cause that can damamge the
system protected.

Answer / k.prakashchandra

You mean the resistance connected in series with the
closing coil ? It is used to reduce the current in solenoid

what about the power of wattmeter at starting and loding?

0 Answers   TATA,

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How can we step up ac and dc ?

1 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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What is the value of nuetral current in star connected load when DC is supplied to it???

1 Answers  

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How do we calculate the Out put voltage of generator, after the excitation is being given?

0 Answers  

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In a poly phase circuit if clamp on meter shows same load on three phases and their sum on neutral then why we use three and a half core cable or maximum the same size of core as that of phase?

1 Answers  

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SAY CORRECT DEFINITION... WHAT IS EDDY CURRENT LOSS? WHAT IS HYSTERESIS LOSS?

4 Answers  

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why exciter frequency 150 Hz ?

1 Answers   Siemens,

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Why is it not possible to operate a star-delta transformer in parallel with delta-delta transformer?

1 Answers  

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WHAT IS THE COOLANTS IN TRANSFORMER?

7 Answers   Bhel,

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how to calculate the capacitor rating for improving power factor

10 Answers   L&T, Property Solutions, Synergy, TAFE,

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Why magnetic flux produces an induced current?? what is the detailed procedure ?? ans plz

1 Answers  

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