What is the difference between IS:1554 (Part 1)/1988 & IS:694/1990 ? What do these two standards specify about?

2 Answers  

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Why star pointed terminal have no current? how?

3 Answers  

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Can we use generator transformer as step down transformer? How?

3 Answers  

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Why induction motor overheated?

2 Answers   HVCC, Physical Research Laboratory (PRL),

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Why is earth connected to neutral on transfomer installations

2 Answers   VACC,

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why dc power can not be used in transformer?

33 Answers   GE, Sail,

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1)Why V cross Arm is used in transmission lines? 2)Why H cross Arm are not used in single poles?

1 Answers  

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HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

0 Answers  

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what is ups?how its works?and what is there in static switch how it works?

2 Answers   Bhel,

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what is the meaning of the HT LT transformer?

10 Answers   Sify,

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If DC supply is given to a transformer it may a) Work b)Not Work c)Give lower voltage than the rated voltage on secondary side. d)burn the winding

12 Answers   wbsedcl,

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Why we use Carbon & graphite mixxed brushes in the DC motor?

6 Answers  

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