For which of the following application, the vacuum interrupters rated 1.2/3.6/7.2 kV?

Option 4 : Indoor metal enclosed control gear

Vacuum Circuit Breaker:

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• A vacuum circuit breaker is a kind of circuit breaker where the arc quenching takes place in a vacuum medium.
• The operation of opening and closing of current carrying contacts and associated arc interruption take place in a vacuum chamber in the breaker which is called a vacuum interrupter.
• Vacuum circuit breakers are more commonly used at system voltage levels up to 72 kV.
• The vacuum contactor’s rated 1.2/3.6/7.2 kV is used for indoor metal enclosed control gear.
• The vacuum interrupters rated 3.6/7.2/12/36 kV is used for indoor metal clad switch gear.