Back in the seventies, sulfur hexafluoride switches and vacuum switches competition in general there have been a fierce factional great debate in the international market. Proposed vacuum switch sulfur hexafluoride send a strong X-ray will be breaking current process, seriously endangering the health of operators and should be a total ban on use. And sulfur hexafluoride gas has excellent arc performance and insulation performance, no - kind of media or mixed media to replace it. Vacuum faction believes sulfur hexafluoride gas by breaking current of Arc burned, immediately break down into toxic gas, sulfur hexafluoride switch box in every moment from leaking into the atmosphere trace, the total leakage very impressive, especially when sulfur hexafluoride switch explode undoubtedly more serious. If widely used sulfur hexafluoride gas as a switch arc medium, atmospheric pollution is out of control. Debate on the vacuum pressure to send very large, Xi'an load switch, the school conducted a number of breaking current measurement, fortunately measure X-ray radiation is much lower than the number specified measurement standards, high voltage switches, concluding that the operator no harm. This great debate finally reported at the time of a paragraph. Load switch by the fuse and isolating switch (or contacts) in series, in which the isolating switch (contactor) is responsible for opening and closing the circuit the normal current, the fuse disconnect responsible for all non-normal current loop, including overcurrent. Current fuse - operating time overcurrent curve ensures the action time. Within N12-12D / 630-20 type indoor AC high voltage load switch is rated voltage 12KV, rated frequency 50HZ three-phase high-voltage switchgear, Lanzhou load switch for the division and load current, loop current, no-load transformer and cable charging current, closing short-circuit current. Equipped with grounding switch load switch that can withstand short-circuit current. Lanzhou load switch, load switch factory direct, Huayi Electric Power (quality businessmen) are provided by Xian Huayi power plant. Road Zhiyuan, temper forward. Xian Huayi Electric Power Equipment Factory (www.xahy.com) aims to become and you win symbiosis, strategic partners to move forward, the more determined to become a high-voltage circuit breaker of the most influential companies, and you leap together to success!