Answer Posted / guest

25*0.8=20kw

Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

2590

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Will any motor burn if voltage provided is lesser than the rated voltage???? If yes, then how is speed control possible with voltage control

2157

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what is the main parts of transformer? how it is functioning? pls giv the ans briefly.

1963

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How to define Kirchhoff current law and voltage law along with simply examples.

1774

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EXPLAIN THE ESSENTIAL FACTORS WHICH INFLUENCES THE CHOICE OF SITE FOR A HYDRO ELECTRIC POWER PLANT

2251

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List the characteristics of filter?

1072

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Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

1977

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What is difference between slip rings and carbon burushes?

15104

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Define pole pitch?

1095

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which type of effect of turbine and generator reverse power protection ?

4195

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What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

2031

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Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason

1916

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why we r not earthed Control cable of C.T. terminals

2035

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

2184

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how to calculate singlephase motor efficiency?

2240

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