Answer / amarjeet kumar

KVA is the rating of power transformer, as transformer is a power source,and it has basically two types of losses one is copper and another is core loss, copper loss depends upon current and core loss depend on voltage so its rating is multiple of current and voltage i.e KVA.It is independent of load so it is independent of power factor too, hence its unit is not in KW .

In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

0 Answers   PPIL,

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what is efficient motors and how it is different from normal induction motors

0 Answers   Sarthak Contracts,

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220/33kv voltage level having 60MVA rating , which transformer is preferred two winding or auto transformer. why, kindly provide your strong technical valuable views.

1 Answers  

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What are the three constants associated with a steady state error?

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What are PLC leader logic program method

0 Answers   AIS,

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what is the speed of current?

29 Answers   Su Kam, TATA,

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Generally in d.c. circuits the direction of current is from possitive to negative.In a.c.circuits what is the direction fo current flow

4 Answers  

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Why use the vcb at high transmission system ? Why can’t use acb?

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hello! can anyone explain to me how a 3 speeds table fan work? what are the factors that are controlling the speed of a normal table fan? Is it by varying the voltage or changing the magnetic field? would appreciate your reply :) thx in advance.

2 Answers  

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if voltage in transmission line more than current will be more or less,if less what about the Ohm's law

2 Answers  

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We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

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what is meant by trip circuit supervision & directional or non directional over current ?

1 Answers   ABB,

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