In Swinburne's Test on D.C.machines, why the efficiency is more when the machine runs as generator than when it runs as motor???

6 Answers   College School Exams Tests, GE, MVR, Practical Viva Questions,

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what is tha between elcb & rccb?

3 Answers   Essar,

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how we can calculate 2 phase welding transformer rating or total power?

0 Answers  

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why core is useful for a transformer ?and also in its operation ?

0 Answers  

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Generally In transformer Tap Changer on HT side, but I have seen in 66KV side in 220/66 KV, 100 MVA, Areva make transformer. Why ?

7 Answers  

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What are the reasons for the parallel operation of transformers?

0 Answers  

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What happens if we connect a single phase energy meter in reverse polarity.

0 Answers  

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application s to shunt coil

0 Answers  

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1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

0 Answers   ABC,

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what is the meaning of 16/20 mva of transformer

7 Answers   JSW,

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why is only master neutral contactor is made to switch in synchronization of dg sets

4 Answers   Honeywell,

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difference b/w current and voltage relay?

1 Answers  

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