How to calculate the External Resistance required for 60HP slipring motor in case no any data of the Motor is available???

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WHAT IS EXTENDED DELTA AUTOTRANSFORMER? WHERE WE USE THAT?

2 Answers   Amtek, TATA,

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cause of failure of transformer bushes

3 Answers  

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How you will determine the volume of oil in a particular Distribution transformer.

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How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

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Is it possible to make 0.75KW motor earthing from MCC panel by using the 1.5 SQMM, 4 core cable, means 3 core for 3 Phases & 1 core for Earth terminal?

4 Answers  

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in dc shunt motor if field winding is shorted then

0 Answers  

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Relation in between KWH & KVAH for Electrical consumption unit & how we can relate if KWH is lower than KVAH

11 Answers   Deepak Fertilisers, Torrent Pharma,

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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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If we says that current is flow only when there is closed path & neutral work as a return path for the same. Then how circuit is closed in three phase as no neutral available ??

1 Answers   Nimbus Harbor Facilities Management,

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What is kvar?

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why the insulators are in cofee colour???

4 Answers   Visa Steel,

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