Answer / uditparashar

star delta starter : it is a set of electrical equipments used to control the current during the starting of induction motor as the starter operates the motor in star configuration in starting and then in delta configuration.

soft starter : it is a set of electronic components which control the nominal voltage of induction motor in order to control high current and torque during starting resulting in prevention of voltage dips and mechanical stress over the machinery .

How will change the frequency in distribution side?

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we the the value of frequency is 50 HZ in DG then why we said the value inductive rectance is zero in DG?

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why transformer calling in VA rating

6 Answers  

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I have 380.KVA DG set how to Calculate the units from DG.

2 Answers   Ozone Pharma, Sperry Plast Limited, Sterling,

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How to calculate Ith (I thermal) for curent transformer

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we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

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For a stable system, where should the poles of a system be in a root loci plot?

1 Answers   GE,

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Why we call cable rating in SQ.mm.If it is 240 SQ.mm how much the diameter possible?is there any calculation ?

4 Answers  

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How core saturation effects the secondary voltage (whats the theory) of a current transformer in service?

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what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?

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what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

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Can we indroduce the principle of single phase induction mator to Transformer? i.e. by Producing rotating flux in the transformer.

1 Answers  

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