Low-voltage load switch, also known as switch fuse AC power frequency circuit is adapted to manually infrequently off-load circuit can also be used to line overload and short circuit protection through load switch off Route touch knife complete schematic overload and short circuit protection by a Fuse completed before the 1970s used plastic cover and steel switch knife switch low-voltage load switch belong to the small capacity of the low pressure switch contact load switching speed and handle operation speed of the larger capacity of low-voltage load switch operating mechanism with spring Principle of operation of the switching speed and handle the speed of the storage operation speed regardless of the configuration together with relatively simple and reliable mechanical interlock switch is not closing the lid open and lid can not be opened after the switch is closed to ensure work safety shunt trip With the take-over current operating power substation "less people on duty", "lights-out" promotion, in order to meet the basic requirements for running remote operation unit, the selection of load switch, load switch Nanchang, you need to configure shunt trip for protection trip use, so that when an overload protection by means of opening the load switch, load switch price, the fuse is only for short circuit protection. Action by the shunt release of the combined appliances breaking load switch, high voltage switches, called the release operation. Relay and fuse time - current curve is not the same, with the use of the inevitable intersection. Protection of operating characteristics and safety fuses - second characteristic point of intersection called "over current." Engineering by IEC to determine the maximum over current methods are: An arc in front of the largest fuse - Timeline second characteristic of taking the minimum load switch opening time, with 20ms protection external relay minimum operating time, which is the current value of the corresponding The maximum transfer current. Load switches and circuit breakers difference? In simple terms breakers are generally used to go through the field off place, load switch generally used do not need regular place Nanchang breaking load switch high-voltage vacuum load switch _ _ Huayi Electric Power (quality businessmen) from Xi'an Huayi Electric Power Equipment plant available. 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!