Electrical contacts are important components of high-voltage circuit breakers, switchgears, disconnectors and grounding switches, and their performance directly affects the quality and service life of these high-voltage electrical appliances.
In the high-voltage, ultra-high-voltage SF6 circuit breaker system, the arc contact currently used is mainly CuW alloy, and the arc contact in the arc contact in the past is the finger-spring structure, which is complex, the spring works heated, and its reliability becomes worse.
As the core component in medium and high voltage switchgear, electrical contacts play the role of breaking and conduction, and are widely used in various high-voltage load switches, SF6 circuit breakers, on-load tap-changers, and large breaking capacity disconnectors and grounding switches.
Electrical contacts are mainly divided into rivet type electric contacts, powder metallurgy contacts, sheet contacts, etc.
Rivet contacts are mainly used in various relays, contactors, small switches, thermostats, etc.
Chip contacts are mainly used in contactors, circuit breakers, thermostats, intelligent switches, etc.
Powder metallurgy contacts are mainly used in circuit breakers, line protection switches, fault current protection switches, leakage protection switches, sliding brushes, etc.
Dongguan Spring Spring Electronics Co., Ltd. (SiS) was established in October 2011, specializing in the design, testing and manufacturing of elastic conductive electronic components, and moved to Chang'an Town, Dongguan in May 2018. The company has CNC lathe workshop, finger workshop, assembly workshop, laboratory. Based on the increasing requirements of the connector industry for high-current connectors, Spring Springs Electronics has developed a new type of bidirectional coil spring finger (SiS®) and single-turn spring finger , forming multiple columnar deformation contact points (up to more than 300 points). It can meet the service life of more than 100,000 times, the spring contact current density and temperature rise are close to the transmission cable, and the plugging force is about 10N. PCB board connectors (board-to-board USC, board-to-wire), cylindrical quick-swappable self-locking connectors (plastic and metal shells), male and female weight-load connectors, electric vehicle chargers, high-voltage power battery pack series connectors, used in Z advanced high-current energy collectors, energy storage and electrical equipment, such as: electric vehicles, charging base stations, wind energy generators, power supplies, high-speed rail, heavy trucks, etc. The company has a number of national patents, and the products have passed international standard testing.
