what are the advantages of Horizontal isolation breakers v/s vertical isolation breakers in medium voltage switchgear class.

1 Answers   NNN,

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Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss

0 Answers  

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Draw SLD feeding from the SS up to distribution board of the load, calculate cable size, breaker sizes, and meter for the following case: Ground Floor: electric room, pump room, 5 shops, each is 15 KW First Floor: 5 shops, each is 15 KW Second Floor: showroom 30 KW Service Loads: water pump 3 KW (3ph) , fire pump 3 KW (3ph), and one DB service 12 KW (3ph).

0 Answers   FEWA, HMK,

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why elcb used in circuit

4 Answers   ABB,

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Sir We have a REF relay connected to 10MVA(Y-Y) Transformer.on External earth fault REF relay trips along with earth fault relay.The REF relay has no complant as we tested relay.Why is it happening?

3 Answers   KSEB,

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in which material resister are made?

1 Answers  

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In case of generator when we consume more power produces by it why load on generator increase and starts sound more. and how it is adjusted..

0 Answers  

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in 11kv generators the neutral point is connected to earth via earth coil while in the 33 / 11 kv transformer the neutral point is connected to earth via earth resistor why? 

1 Answers  

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how to decide the load on secondary of the tranformer

1 Answers   DLF,

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hw the cable size can be calculated when we have watss, volts, pf, i need the forula

2 Answers  

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How the setting of the vector surge relay shall be calculated when the relay is to be used for Grid islanding application?

0 Answers  

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Unbalance in voltages at motor terminals is caused by ____.

0 Answers  

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