what is the function of a Master trip relay? why is it used ?

5 Answers   ABB, Nissi Engineering Solution,

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We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

1 Answers  

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how to calculate short circuit calculation of the transformer by usuing the percentage impedence? formula needed.

2 Answers   L&T,

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3ph motor running with unequal kw and different pf what are the reasons

0 Answers   UltraTech,

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why we are used armed coble for wiring of 3phase motor?

3 Answers   AluChem,

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what is LDR used in street light

2 Answers   Cipla, Ram Infotech, Wipro,

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While miss missed name platform fo electric motor how to calculate simple fourmul,?

1 Answers   ABB, ABC,

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please design a rectifier with batteries for below requirement and also explain how you calculate this solution, Load = 700Amp DC Backup time = 6 hour. please explain briefly ?????

1 Answers   GNFC,

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what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

0 Answers   ABC,

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in transformer which grade oil will use?

3 Answers  

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What is the ratio of true power to apparent power in an ac circuit?

0 Answers  

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Why P.F(power factor)relay should not be connected to the D.G(diesel generator) incomer side

1 Answers   ABB, Corsa,

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