Brand: Shanghai nine open Model: JKCS1-125L / 4P structural features: JKCS1 series of intelligent dual power automatic transfer switch consists of two parts switch body and switching controller. Products using electromagnetic drive, switch controllers work with AC main power, standby power 220V power supply without additional control. Switch body has an electrical or mechanical closing instructions as an indicator of isolation purposes. Use: apply to 690 volts AC, rated frequency 50Hz / 60Hz. In a power phase, overvoltage, undervoltage fault conditions, under the control of the controller can quickly switch from the common power load change to standby power (standby power must be normal at this time). The user can also make the load when required in an intermediate position, and the load is neither constant nor the standby power supply is turned ON. This product is mainly used for a load of the state, is widely used in firefighting telecommunications, hospitals, hotels, urban rail transit, high-rise buildings, industrial assembly line, television and other places that require continuous power supply. Main and backup power supply can be grid, self-starting generators, batteries and so on. Performance: 1) two-stage automatic transfer switch, when the switch is connected to the switching signal does not stop in the middle of the open position immediately change from one power supply to another power. 2) three-stage automatic transfer switch, the switch after receiving the converted signal can be immediately (or after a predetermined delay time) from a power supply switched to the other, you can not change received from a power source communicates with any intermediate power off position. 3) S or L series electrical level switch is: PC level. 4) wiring boards are pre-wiring. 5) rated working voltage AC660V / 690V, AC380V / 400VAC110V switching appliances for special delivery.