Answer / a guru

The 3 phase delta/star 11,000/400 volt step down transformer has 40 turns per phase on primary. Find out the secondary turns.

Why is copper a better conductor of electricity than aluminium?

5 Answers   AES,

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in india per day how much power is generated including all power station

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what does the regenerative braking mean?and how it used for Dc motor? thanks.

2 Answers  

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How npn and pnp transistor works

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How to calculate MCB Breaking capacity.

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Control wiring of a dol starter for forward and backward

0 Answers   Basj Industries,

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what are the main problems that happen in an emergency light and how to fix them ?

2 Answers  

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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 size Air Circuit breaker (ACB)? What is the most important factors?

0 Answers   ABC,

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what is appearent power?

3 Answers  

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why the the electrical machine coil are damage ? How to prevent it?

2 Answers  

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what is the burden?accuracy?Knee point voltage? what is the Alternator of PGM?

0 Answers   L&T,

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