Answer / koti1965

Measure size of 11 KV winding wire ( near HV Bushing or tap changer0 and find out current by using a current density of 3 A/Sq.mm and then KVA.
 Ex : HV Conductor Size = 60 Sq.mm  i.e I1=180 A So KVA = 3500
     and cross check with LV conductor size which will be
     1650 Sq.mm. 

Answer / k.prakashchandra

Almost all dist transformers have similar cooling , compare the quantity of tr oil with known one to get appx rating

125Kva Dg can take up how much amphere load.

7 Answers   Indian Railways,

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why do we need transformers?

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For a 50MVA (138/69/13.8 KV) transformer, what would be the maximum demand in order not to exceed 80% of its operating capacity.

2 Answers  

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What is the kiosk parts, about them and their functions ? If anybody have some PDFs files or details about this plz send it on tawhidfaisal@Yahoo.com

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advantages of vvvf drives over non vvvf drives for EOT cranes

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This is reqd for a 1MW Solar power plant..We have 2DC outputs from the solar panels Connected to 2INVERTOR panels.. Output from invertor is 3ph,280v,500kva,50hz.These are connected to individual ACB.This has to be stepped up to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT BY USING a single two winding 3 ph transformer 11kv/1250kva. or (2)use the two outputs and connect to one three winding transformer of above rating..Pls suggestwith details.

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The power dissipated by a resistor of 10ohm when a current of 2A passes through it is:(a) 0.4W(b) 20W(c) 40W(d) 200W

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How can we have to decided motor connection as a STAR-DELTA or DELTA-STAR?

3 Answers   IOCL, Jindal,

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why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

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Draw torque - speed curve and load curve of induction motor? mark operating point ?

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what will happen when choke in tube light circuit was not working???

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11 kv metering is done in my factory.Meter show PF 1.000 but kvarh lag&lead show 24&94 respectively & Avg.PF is .956 .? is what i do for inproove my PF to 1.000

3 Answers  

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