Why are short circuit ratings always 16kA,25kA,36kA and 50kA.Who has fixed these?

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i am swathi, b.tech 4th year. In smps(switched mode power supply)we are using diodes,mosfets,igbts for controling of current. And my question is why we did not use thyristors(scr)? it is also act as a switch,then what is the drawback of scr as compared to above transisters> if we use the scr,then what is happening ? plz give reply as soon as possible bcoz i am doing project on smps. plz frnds i want ans for that. if anybody know the ans plz send to my e-mail id /swathi.tadakapally@gmail.com/

5 Answers   EEE, TCS,

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pls send me some of the solved question booklet of Junior Engineer -2 (ELE) in RRB

1 Answers   RRB,

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

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Why capacitor is blow when I am starting motor ?

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what is the acceptable insulation resistance for motor/transformer?

2 Answers   Reliance, Tata Motors,

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all types of electrical quations

1 Answers  

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What is size 00, 01, 1 etc., in HRC fuse types?

0 Answers   Jaypee,

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what is difference between multimeter and transmitter

1 Answers  

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how can you calculate fault level ?

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If a contactor need to replace with faulty one. what I want to check?

2 Answers   Bhel,

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What exactly is meant by harmonics and harmonic current?? and what is skewing with regard to this??

2 Answers  

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