how to calculate of which rating transformer should be selected? take any example

2 Answers  

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What is the AVR in DG & its functios

2 Answers   Godrej,

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How to reverse the direction of a DC motor ? By reversing the Armature wires or by reversing the field wires

2 Answers   KFC,

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HOW CAN I GET 5CORE HO7 CABLE SIZE IF I HAVE 1800A?

0 Answers  

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what is the working principle of DC generator ?

10 Answers   DRDL, HCL,

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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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What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2 Answers  

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WHAT IS MEANT BY OVER EXCITATION IN GENERATOR TRANSFORMERS? DESCRIBE IT.

0 Answers  

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How do we calculate tranmission line losses of a 132 KV tranmsission line. Please give some quick tips?

2 Answers  

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How to calculate earth wire load by formula

0 Answers   Caparo,

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how to prepare PPM schudule

3 Answers   TATA,

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What is difference between Over Current & Earth Fault protection?

0 Answers   ABC,

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