Answer Posted / ashish patil

by pouring water ,charkol and salt is used but it is old
method.use pouring of Bentonite powder by using water.
Also to reduce earth resistance by parralel resistance to
earth mesh.it cen achived upto 2ohm.

i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1856

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when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)

2124

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I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

2513

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What are the main significances of root locus?

1277

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what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.

2388

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What is the formula to calculate the rating of power cable for three phase current.

2179

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What is the different types of cable & current capacity of cable

2034

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Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?

1730

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what is mind in cable

2134

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why and where we use early make & late break contacts in protection?

8382

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whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?

1659

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what are the values of VRY,VYB,VBR,Vry,Vyb,Vbr,Vrn,Vyn,Vbn for Magenetic balance test of 100 KVA and 63 KVA Distribution transformer

3023

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how ups works ? various parts of ups and working principle

2072

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I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

1993

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can anybody send the rrb chennai &rrb bopal question papers of 2006&2007.My exam is on 12 oct 2008.Its urgent

2093

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