Why R ph of Hv and Lv is shorted or joined together while taking vector group?

1 Answers   IOCL,

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Is it any dc fuses availbale in market? can we use one fuse for both AC & DC ?

6 Answers  

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1 HP = how many Kva

5 Answers  

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what is meant by unity power factor?unity means one why dont call 2,3,4......?

6 Answers  

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what is differnce between grounding and earthing or both are same?

3 Answers  

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what is the earthing condition between earth & phase.

3 Answers   ABB,

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what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing

0 Answers   ABB, Genpect,

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

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how to calculate the capacitor to maintain power factor?

0 Answers   Bosch,

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What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

17 Answers   Alstom, Call Centre, EDC, HCL, Procon Engineers,

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1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

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why voltages are added when batteries are connected in series?

4 Answers  

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