Answer / mn krishnamurthy

usage of lot of frequency drives and votage regulatiors with IGBT and SCR for heavy loads with start and stop and linear varying voltage for speed control created Harmonic currents

why generaters need four earthings

5 Answers   Sasken,

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Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

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The synchronous speed of a motor with 6 poles and operating at 50 Hz frequency is ___.

4 Answers  

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when meggering a 3ph,480v oil reservoir heater on a regen gas compressor, why do I get a reading to ground when meggering phase to ground? shouldn't it read opened or is there something that makes it read closed? on the same heater, when ohming, it reads open. thanx

1 Answers  

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should Dy11 and Dy1 group can be operated in parallel??????

1 Answers  

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How to connect the earthing in aircraft?

1 Answers  

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In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

6 Answers   Hindustan Unilever Limited,

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i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers

4 Answers   Hyundai,

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In vapour absorption refrigeration machine fluids used are

0 Answers   Caterpillar,

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what is the UPS

4 Answers  

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What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas

1 Answers  

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How one may guess the direction from which the distribution line is incoming if there is no pole plate on poles?

0 Answers  

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