Answer Posted / dinkar

For same kva power , higher the frequency -lower the size.

Please explain, how to test vector group of tranformer(Delta y1) . Thank

1657

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What is your acheivements

2095

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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<

2090

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what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights

1890

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advantage and disadvantage of team work?

1642

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what will happens if one phase is missing for 33/11kv power transfomer and why?

2592

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what is metering cum synchronizing panel and how it is used?

4564

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Give some example of fault limiting devices?

1277

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why the neutral point in connnection oscillates?

2208

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what is the importance of earthing system on the generators big capacity and small?

1698

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What is DC series motor?

1188

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how can i reduce sparking without stepdowning the voltage

2467

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Can I use star delta connected induction motor for dual supply voltage?

1897

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An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The slip when motor stalls is A 1 B 0 C 13.33% D 10.33%

1845

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bsec exam syllabus (mis)

1216

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