Answer / sukhvinder

two transformers are separated by concreted wall becuase of
when any fault occurs which results in fire on any one of
transformer it protects the healthyone transformer.

Answer / guru

If the distance between the transformers is more than the
requirement then firewall will not be required as per IER
1956 standards.

There is a minimum distance laid down in IEC1956 based on
the capacity, voltage rating of the transformers

Answer / tom hanks

Any two transformers in a plant/substation are always
seperated by a concrete wall known as BLAST WALL, (Blast
walls are generally 1000mm+ bigger the size of larger
transformer) It is protect the healthy transformer from
fire, incase the other one is on fire due to short-
circuit/oil leakage etc.

Answer / shaji samuel

Two Transformers aside should be supperated by concreted
wall because through blast wall we prevent the two
transformers with each other fault,shortcircuit sparks, and
due to the blast of the oil tank of the transformer then we
can prevent the safe one transformer.

Answer / sasi karthick a

It is fire wall, during fault condition if transformer at
fire it should not spread to other equipment/buildings.

As per IS, the thickness should be 350mm brick wall/230mm
concrete wall. Height of the wall shall be decided based on
the height of x'frm

The Q-facr o of a coil given as wL/R. what will be shape of Q versus frequency graph.

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2 Answers  

Whether power factor should be high or low? Why?

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what is the function of LBB relay

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What is the principle of residual protection?

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depending on what we can choose the rate of mccb considering that we know the total load

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

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Everybody Knows What is ACB, VCB but anybody tell me what is ST?

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