Answer / saish n kharkar

In case of SF6 CB SF6gas is used as arc quenching medium in.
when CB trip the male-female contact (we can say fix and
moving contact otherwise) gets opened at the same time SF6 gas
at particular pressure enters between the contacts and quench
the arc, also act as a coolant and insulating medium.

transformers? power factor? machiences?

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

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We know that primary transmission is done to reduce current so that i^2*r loss could be minimised but according to ohm's law v is directly proportional to i,which indirectly means higher potential difference means larger current?so how the current is minimised in high power transmission line??

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what is the defination of 'Mass' & 'Weight'

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Ferranti Effect says that voltage at the receiving end is higher than that at the sending end. How is it possible?

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how to calculate the current carrying capacity of cable

2 Answers   Bhel,

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what is the difference between real and reactive power? and what is the importance of these

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what is a synchronizing lamp ?

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What is step signal?

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what is the meaning and difference between ELECTRICAL DRAWOUT and MANUAL DRAWOUT?

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how we calculate the withstansing current capacity of wires&cables?

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why would amp draw on neutral wire be as much as amp draw on the hot leg.

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