Which of the following is the merit of minimum oil circuit breaker?

Oil Circuit Breaker:

• An oil circuit breaker is one kind of circuit breaker where the insulating oil can be used as an arc quenching medium.
• It includes separate contacts and the main function of these contacts is to separate an insulating oil. 
• When the fault occurs then the contacts of the breaker will open beneath the oil. 
• Once the arc is struck among the two contacts of the breaker then the heat of the arc will dissolve the surrounding oil & separates into a significant volume of gaseous hydrogen at high pressure.
   

Types of Oil Circuit Breaker:

1.) Bulk Oil Circuit Breaker:

• This kind of circuit breaker uses a large amount of oil for the destruction of the arc.
• The size of the oil tank is very large.
• The amount of oil used in this circuit breaker mainly depends on the system voltage. 
• For instance, if the system voltage is 110 kV, it uses 8 kg to 10,000 kg of oil. Similarly, for 220 kV, it uses 50,000 Kg of oil.
   

2.) Minimum Oil Circuit Breaker:

• This type of circuit breaker uses less oil.
• The size of the oil tank is small, hence the space requirement is reduced.
• It requires less maintenance.