while we select CT, why the CT ratio is divided by 5?? ex:250/5,15VA,CLASS-1 CT.Why it is divided by 5??Help me please

2 Answers  

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The Howland current source produces a A Unidirectional floating load current B Bidirectional single-ended load current C Unidirectional single-ended load current D Bidirectional floating load current

0 Answers  

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Define transfer function?

0 Answers  

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What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection

0 Answers   ABB,

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why we can choose induction machine in wind mill? why can`t use synchronous machine?

3 Answers  

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A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

0 Answers   VECL,

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what is the differenc between A.C. and D.C, which is more dangerious?

4 Answers  

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IN WHICH MODE THE TRANSFORMER WILL GET A MAXIMUM OUT PUT VOLTAGE. ASKED FOR POWER GRID EXAMINATION STAT-STAR,STAR-DELTA,DELTA-STAR,DELTA-DELTA

3 Answers  

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what is the operating principle of contactor(power).along with disection?

3 Answers   NASA, Tech Mahindra,

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can any one tell me the formula for calculating the power and unit consumpetion

9 Answers   Avalon,

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How 48-relay (incomplete sequence) functions?

0 Answers  

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How to calculate the cross section area for a 350 m cable, motor power is 26 kw???

1 Answers   Orient,

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