价格:0.00/只
供应:500只
Vacuum: Vacuum bottle to contain and extinguish the arc . Vacuum breaker can actually reach about 40.5 kV , rated up to about 6300 A. Air: the arc is extinguished by the air. These devices are rated for 6300 A or higher , often in a factory or in any location , ease of maintenance is the key to use. Air circuit breakers are gradually replaced by a longer service life of the latter type of vacuum .