Answer / sneha

DUE TO VARIATIONS IN VOLTAGES,VARYING MAGNETIC FIELD IS
PRODUCED & THIS VARYING MAGNETIC FIELD CHANGES DIMENSION OF
FERROMAGNETIC ELEMENT USED AS A TRANSFORMER ELEMENT & IT
APPEARS AS A VIBRASIONS.THIS VIBRATIONS ARE SOURCE OF THE
NOISE.

Answer / sheikh

Commonly new and quality wise transformer not producing too noise but due to magnetizing + mutual induction transformer creating some noise . old transformer which is cores becoming loose may producing heavier noise.

what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?

0 Answers  

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If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

0 Answers   MEIL,

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What is IPXX?

2 Answers  

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If there are two transformer having rating of 2.5mva, 6.6kv/440v(satr-star),and the load is 600kw then what is better to maintain less losses in transformer having both transformer in parellel or only single transformer connected to load? Please give calculated answer

0 Answers   UltraTech,

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why we are maintain phase to phase clearence

4 Answers  

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can u guys pls suggest a good material for learning abt switch yard and its components

2 Answers  

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WHAT IS THE DIFFERNCE BETWEEN AIS AND GIS IN SWITCH GEAR?

5 Answers   L&T,

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In which connection the distribution T/F is connected? a) ▲ / Y b) Y / ▲ c) ▲ / ▲ d) Y / Y

4 Answers  

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how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

0 Answers  

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what is infinite in infinite bus

4 Answers   GES,

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Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

0 Answers  

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what would the resistance of a 110v 150w submersiblepump motor windings be

1 Answers  

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