Answer / arup

ZONE 0 --Areas in which an explosive gases atmosphere (An
explosive gas air mixture) is present continuously or
present for long time.
ZONE 1---An area in which explosives gas atmosphere is
likely to occur in normal operation.
ZONE 2--An area in which an explosive gas atmosphere is not
likely to occur in normal operation and if it does occur,
it will exist for a short period only.

What is the recommended voltage gap between Live and Earth and ,Earth and Neutral.If these are exceded what is the solution.

2 Answers  

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directional over current relay when acted & how it works

3 Answers   NCC, ThyssenKrupp,

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where was current transformer protection units used and why??

0 Answers  

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how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

0 Answers  

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how much allowable resistance that can be difference in motor all coils?

0 Answers  

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Caliculate the Specific Fuel consumption of 320 kva diesel genarator set?

3 Answers   AllTech, RRB,

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what is at/cm ?

3 Answers  

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In an alternator running with a balanced zero p.f. lagging load, phase differernc between the resultant armature flux and main field flux is always____? options is 180 degree....why?? explain.

1 Answers   BREB,

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We know that, in case if there is a faulty insulation,or sc, the current is bypassed to earth through the earth wire that has low resistance.Actually, what will happen to that current that flows through gnd?In that case,if we come in contact with that faulty appliance, wont that current flow through us as we form a closed path by standing in gnd?Is grounding a safety measure?

3 Answers  

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Why temperature rise is conducted in bus bars and isolators?

0 Answers  

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what is DG A,B,C,D check?

1 Answers  

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if the supply frequency increases what happens to the motor load

2 Answers  

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