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.

When we need up only in o/p 440v, so why we use directly in 11kva in input?

0 Answers   Lupin, Medhaj Techno Concept,

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what is formula to cal cute earth pit numbers and size of earth strip used in earthing?

0 Answers  

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What is the importance of quality factor in resonance?

3 Answers  

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CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

0 Answers  

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I have a transformer 3phase 11kv/410v and its name plate missing. now how can I judge its rated kva?

2 Answers   Coca Cola,

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Why corona leads to production of Ozone and glow of the color VOILET?

0 Answers  

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why and where we use early make & late break contacts in protection?

0 Answers  

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2 Diesel Generators 900KVA connected to the bus bar for essential load as an alternative for power taken from 11/440V 3KVA Transformer supplying this bus bar. my question here is in the event of power failure on 11KV side can I feed the power to 11 KV bus by using the same transformer as reverse feed, what will be the inrush current???

3 Answers   Ashok Leyland,

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Why the vector group of excitation transformer in static excitation system is Dy5?

2 Answers   CSEB, SRF,

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Why using synchronising methed in DG's sets?

0 Answers   Juniper Networks,

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Why the wave trap is put in Y phse only in switchyard?why not in other phases?

1 Answers  

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When we synchronize the Generator BKR with TIE BKR then Gen BKR is hold but TIE BKR is Tripped on Non directional over current but when TIE BKR is Syn. with Gen. BKR then no fault occur so what is the problem

1 Answers   ABB,

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