Answer Posted / anbarasu

power means high amplitudes of current and voltage

how to maintain frenquncy with syncronising sub-station for distribution

2072

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Why control of DC motor is simpler?

2375

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Why we use mho Relay in long transmission line?

1391

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

1883

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What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

1820

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at which voltage level arcing ground is occurs ??????????

1991

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Why neutral point is consider as zero potential?

2542

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What is the unit of magnetic flux density?

1115

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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<

2091

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What is the numerical quantity of sqcm?

1947

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State nyquist stability criterion.

1111

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how to test power transformer.YNd11

1515

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While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x

1872

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What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

2586

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Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?

2021

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