in our transmisison sub station why we step down firstly 132kv\33kv then 33kv to 11kv. can we direct step down 132kv to 11kv.

4 Answers  

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what is reluctance?

11 Answers   TCS,

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Hi ,what the accurate method to set correct(In) over load to protect the 3~ motor

4 Answers  

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what are the limitations to use 33kv ac in industries?

0 Answers  

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what are the various types of towers used in transmission line

12 Answers   Power Grid, UltraTech,

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

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how to find Harmonics and types as per the equipemnts

0 Answers  

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What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)

0 Answers  

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For 300MW and over a distance 250 km, what voltage be selected? and no. of circuit?

5 Answers   DPL, NTPC,

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What is Vk and Imag i.e Knee point voltage & Magnetising Current? How to calculate above values? How to define accuracy class 5P10?

7 Answers   Deccan Cements, Doosan, Torrent Power, Transco,

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what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

0 Answers  

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On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

0 Answers   TNEB Tamil Nadu Electricity Board,

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