What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?

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True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

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why florescent light was flickering?

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What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?

0 Answers   HPCL,

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How to design the earth grid for lightning protection in an industry

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In scott connected transformer number of turns in the primary winding of teaser transformer is % of number of primary turns of main transformer A 86.6 B 57.7 C 14.4 D 33.3

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how to wiring it with contactor and timer together

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why table fans rotate clockwise .while ceiling in anti clockwise?

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Difference between DOL starter & star Delta Starter? And where the Dol starter used upto how much HP and whereas Star Delta vice versa?

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if 50hz transformer is required to be run on 50% frequency what needs to be done???????????

6 Answers   century,

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what is phase shifting transformer.

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Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.

0 Answers   VECL,

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