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 diff. between earth nd neutral?

3 Answers   NTPC,

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what will be the magnetizing current in the testing of 27 MVA transformer?

1 Answers  

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why buchholz relay is kept on inclined position and why it is cover??

1 Answers   GSECL,

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What is the Surge for 1.1 Phase Induction Motor(For Eg.1Hp) 2.3 Phase Induction Motor(For Eg.1Hp) 3.AirConditioner(For Eg 1Ton) 4.Refrigerator(For Eg 180Ltr or 160kW) 5.Induction Cooker 4. Ceiling Fan

0 Answers  

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what is the principle of synchronous motors?

3 Answers   The Grand,

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What is slip in an induction motor?

0 Answers  

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What is the IS standard for MCCB to be use (As per capacity of AMP)& for ACB also.

0 Answers  

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what is differnt between metering CTs an protection CTs

10 Answers  

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Hi.I want to ask how to calculate contactor rating current? for example I have 460 V , 100 A (induction motor) calculate contactor rating current?

2 Answers  

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what is the function of step up transformer?

2 Answers   DEWA,

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What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

0 Answers  

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What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.

0 Answers   DAE,

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