sir what is the purpose of SF6 in HT breaker and what is the pressure should

sir
what is the purpose of SF6 in HT breaker and what is the
pressure should be maintain in the breaker?

Question Posted / dil_sen_2010allinterview

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sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the b..

Answer / shaji samuel

Insulation property of SF6 gas is 2 to 3 times of the air &
it is a electro negative gas. On arcing it absorbs the
electron in the medium & immediately quenchs the arc.

SF6 gas pressure is 4 to 5.5 Kg.

You need not to worry about the pressure as there is a
pressure switch in SF6 breaker which need to be interlocked
safety indication

So that once the SF6 gas pressure reduces it gives you an
indication Also take care that once pressure reduces do not
trip the breaker

Is This Answer Correct ?

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sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the b..

Answer / y ashok

sf6 breaker are used for ht voltage.

sf6 breaker (sf6 gas) are high arc quenching capacity.

sf6 breaker details:-(as per my knowledge)

voltage:132 kv
current:800a
sf6 pressure :4-5.5 kg/cm2
air pressure : 12-15.5 kg/cm2
make:cgl

Is This Answer Correct ?

5 Yes

2 No

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