What is a differential amplifier? Also, explain cmrr.

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Where voltage are high and current to be interrupted is low the breaker preferred is:

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if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side

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Why the vector group of excitation transformer in static excitation system is Dy5?

2 Answers   CSEB, SRF,

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v/f drive basic princeple

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how circuit breaker work.. what is the operations taking place inside a circuit breaker when an overcurrent occurs... is it similar to fuse?

0 Answers   LTT,

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What happens on the secondary of a 33kV/11kV when one phase of the primary fuse blows?

3 Answers  

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How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

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how to select DG set for certain load?

7 Answers   ACC,

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why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.

0 Answers   Sail,

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how to calculate induction motor rating (HP) if name plate is missing from motor at site condition ?

6 Answers   ABB, apatel, Bhel, Spatel, Voltas,

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A motor running with lenze frequiency inverter stops if I REDUCE SPEED with 25% load.If I run it in High speed and medium speed running smoothly with full load.please help me to solve it.

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