Answer Posted / rohit mahajan

THe direction of 3 phase induction motor can be reversed by
interchanging the connections i.e. if motor is connected to
3 phase as RYB now by connecting motor in RBY will result
in reversal of direction of motor as the direction of flux
is reversed by changing the connections

Why an ac systems are preferred over dc systems?

1053

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What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

1403

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Why power genaration in India is at 50HZ while America its 60HZ

2231

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What is dc current source? Differentiate between ideal and non ideal current sources?

1386

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can i connect wavetrap in 2 different phase in EHV line?

1782

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how much leakage current is allowed in MC61A L&T make relay?

3608

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Please define ohm’s law for a.c (alternating current)?

1024

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What is the role of Dedicated earthing in UPS System?

3043

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WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

2451

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What is the maximum operating temperature for a thermoplastic insulated cable?

1073

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what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

2037

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State and define ohm’s law?

1092

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for compensate 315mh inductance ,how many capaciance required?

2002

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why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

1896

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what is the reactance,capacitance & impedence electrical armoured & unarmored Cables.

2132

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