Answer / george

oil emersed xformer- uses oil for cooling system

dry type xformer uses only his housing for cooling system.
we call it heat sink

Answer / raza

In Oil transformer, Mineral Oil is used for insulation and
cooling pupose but in dry type transformer, no any kind of
oil is used. In dry type transformer, other methods of
cooling are used i.e. air cold, water cold etc. and for
insulation purpose air, vaccume etc. are used.

in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

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How we can measure the thickness of bus bar for a given load ? any farmula Plz elaborate clearly.

2 Answers   ITC Infotech, TCS,

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Hi If connecting a temp generator 670KVA .415kv with step up Tx .415/11kv. I am given Generator impedances Z1 Z2 Z0 to 100MVA base. Do I need to work out the generator fault current by using these impedances i.e gen rating / impedance. Then use this as my source impedance for the calculations that follow.

0 Answers  

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0 Answers   KSEB,

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please send me jindal previous aptitude and technical question and answer.my email id is deep_raj@live.com

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how to male a d.c bettery to blow a 230v bulb?

1 Answers  

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what happens when back charging of transformer is done for longer period

1 Answers  

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Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.

0 Answers   VECL,

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difference between EMVT, PT & CVT ?

9 Answers  

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I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

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A ray hit a smooth regular surface at an angle of 20 from the normal. Calculate : 1. The angle btw the incident and reflection ray. 2. The angle of deviation.

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What are the types of transformers according to the arrangement of iron cores?

0 Answers  

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