what is differnce between oil transformer & dry type transformer ???????????

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I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

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What is sunrise meeting ?

1 Answers   KSEB,

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i have 3500 amp load and select current transformer and perches.how i calculate .please understand

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which theorem is used to analyse fault a)thevinin b)Norton c)Superposition d)jordan

1 Answers   FFC, NTS,

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why batteries are rated in ampere hour

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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.

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What is the function of the exiter in DG.

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In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers  

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HOW CIRCUIT BREAKER RATING CALCULATED?WHAT ARE THE PARAMETERS CONSIDERED?

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What happen while we measure the Current in Rotor?

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How many points does a Circuit can have?

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