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Answer Posted / mandeep singh
its "LAPTHANIC BASE" oil fot HT transformers and "PERAFFENIC BASE" oil for LT transformers
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hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------
The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input
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Dry type transformers
I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)
HOW DOES THE ELECTRONIC ENERGY METER WORKS?
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If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?
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In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?
