why VCB are not used in 132KV system(above 33KV system)
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Answer Posted / nihar ranjan mandal
Amount of vacuum required to quench the arc at 132 KV level
will be very high. It is difficult to maintain that amount
of vacuum in practical purpose. Now a days we use GIS( gas
insulated substation for 132KV level. Where arc is quenched
in hydrogen chamber.
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