| The nozzle is an insulator which is used as a circuit breaker for SF6 gas. The circuit breaker of SF6 gas opens and shuts an electric-circuit for power- transmission-lines and distribution-lines that are installed in high-voltage substations of more than 66kV. The nozzle is part of excellent insulation to prevent arcing across two poles.Lintersection method : The circuit-breaker extinguishes the arc with SF6 gas, in the case of two poles intersecting. | 
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