Three-phase intelligent composite switch capacitor dynamic compensation switching synchronous switch Composite switch low voltage is described as follows:
Overview. SRFK series intelligent low voltage composite switch is an intelligent environmental protection type low voltage capacitor switch. It automatically finds the best switching point through intelligent judgment, realizes voltage crossing zero turn-on and current crossing zero turn-off, so that it has the advantage of zero crossing turn-off at the moment of switching and disconnecting, and has the advantage of low power consumption of contactor switch after switching. The main advantages include small inrush current, no sintering by electric shock, small power consumption, and has the function of voltage abnormal protection, which has been significantly improved in the inrush current and safety reliability.
Technical parameters. The voltage range is 380V/220V±20%, suitable for three-phase four-wire AC (50Hz±5%) systems. The control voltage is DC 4-32V, and the inrush current is less than 2 times the rated current. Three-phase capacity of cocomplement <40kvar; Sub-complement per phase capacity s13.3kvar. The switching mode is zero crossing switching and relay mechanical switching. Intelligent mechanism includes intelligent monitoring, voltage fault phase loss protection, power supply voltage phase loss protection, self-diagnosis fault protection, power failure protection. Low power consumption <1.5VA, service life of 2.1 million times, input impedance
26.8kΩ, on-impedance <0.003Ω, response time <100ms, insulation class in normal atmospheric conditions 210ΜΩ.
Requirements for use. The ambient temperature is -25ºC~+55ºC, the relative humidity is <90% at 40ºC, the surrounding medium has no explosion risk, no gas enough to damage insulation and corrosion of metal, no conductive dust, the installation is not easy to violent vibration, no rain and snow erosion.
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