In three phase energymeter the spindle rotating backward why?

1 Answers  

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What are the usege & different between UPS & batteries with charging system in in Substation?( UPS 120V AC & battery charger is 120v DC)

1 Answers  

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what is the voltage level which is used in transformer short circuit test

1 Answers  

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can we use inductor in case of d.c.,if yes then what will happen in circuit

3 Answers   JSW,

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what isthe emf eqation of a transformer

7 Answers  

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what is IP 55 & IP 54 ?

1 Answers  

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800a siemens vcb in our company can not be closed electrcally an mechanicaly cc and oc coils are found ok. why?

2 Answers  

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what is meaning of Power factor?????????

3 Answers  

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why dhyedration test required for transformer oil once in a year

1 Answers  

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what is the working principle of dc motor & its application ?

3 Answers  

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We wish to test 60 Hz systems from a 50 Hz supply. To acheive frequency conversion, we use a VFD. The VFD powers 40 kVA transformer, which has motor and non-motor loads on it. Will the transformer work?

2 Answers   Suzlon,

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Why transformer use to generator neutral earthing purpose ?

1 Answers  

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