Answer / k.prakashchandra

Aux tr is located inside the station premises for the
supply at LT for station's own use only.

Answer / k.prakashchandra

Transformer at a station for self-use.It is normally of
11KV/415V ratio

Answer / kingshuk dey

Auxiliary transformer is any transformer used for a separate dedicated part of the circuit/electrical system and does not supply to other parts.
For example, if you have a Motor Control Center with 5 buckets for 5 motors circuits, you can have one dedicated transformer for each of those circuits for control power. Each transformer will hence be an "auxiliary transformer".

Or you can have one transformer providing control supply to all circuits. That will be your "primary or main control transformer".

The prime reason for using auxiliary transformers is to isolate supplies for each equipment, such that if one is affected/damaged, the others are protected and are up and running. Or sometimes because that particular part of the circuit requires a separate supply. (Like, all other circuits can be controlled by 230 VAC, but one part requires 110 VAC, or you need to give dedicated 110VAC supply to SMPS for 24 VDC to PLC).

why the capacitors works on ac only

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

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A system absorbs 100 k J of heat and the increase in its internal energy is 100 kJ; the work done is

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Dear sir my name Ankit i m Diploma holder present working in Welspun Corp ltd Anjar as Asst.engg (salary 14400/month ctc) i Would like to change my company also i have selected in ford India pvt ltd Sanand as trainee Tech with salary 12000/month so please suggest me for changing my job hope for *ve response

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Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803

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Why in india freq. is 50HZ & in U.S.A. it is 60HZ?

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