how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

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R u say ,that is there is any flux in your room.

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how to check 3phase motor winding with help of multimeter?

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how to synchronize 3 phase slip ring induction motors of different ratings.

0 Answers   GMR,

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why transformers not work at d.c.-

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what is Fault level? why it is calculated? how will u decide same for our plant?

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what will be project cost for 100 kv transformer connection under oyt scheme.

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Why we use a H.T. Fuse from a thick wire, on other side we use high rating of cables? & Why we use less Sq. mm Cable on H.T. side , on other side we use Large Sq. mm cable?

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Why DC weldings sets preffered over AC considering human safety aspects ?

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Can we use shunt trip coil instead of trip coil with protection relay for protection?

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For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?

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Between Turbo alternator and Hydro alternator which one is more difficult to cool and why?

2 Answers  

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