Answer Posted / pramod kushwaha

Star - Delta

How to work meggar?

1819

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What is the form name of 'c' license, I want to download in web

1893

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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<

2149

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What are marginally stable systems?

1091

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IN induction motor pf is increased using capacitors.what will be the effect on motor and system when very large capacitor is accidently installed and pf goes leading.

2135

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Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?

1150

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How 3 phase invertor works?

2060

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why effective resistance should be more than static resistance in transmission line?

2091

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how to find impedance , mutual indatnce in transmission lines

2289

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battery capacity use of made?

2538

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In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

4226

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what is a pilot wiring and whys that called a pilot wiers

1915

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What are the classifications of heating element?

2040

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why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1931

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How to design pavement quality concrete by using C.R.C.P Method

1739

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