CT Powered Feeder Protection Device

PSW101 universal CT powered protection device Summary PSW101 universal CT powered protection device is a 10KV feeder protection device which has the function of over current, fast breaking protection and grounding protection according to the use of domestic users. With the use of standard current transformer, power supply is obtained by CT from the current line. Current quick-break protection, over current protection and grounding protection can be realized by driving the tripping coil so as to achieve low power without auxiliary power supply. The device, which not only saves the cost of the manufacturer, but also increases the stability of the system, solves the problem of the life of the conventional power supply battery so as to achieve the maintenance free. PSW101 especially suitable for medium voltage power distribution system breaker cabinet and boundary load switch, constitutes a protection system with the special standard current transformer and trip coil (24 v). Safe and reliable, life can be up to 25 years. Features ? Using the CT powered technology, no external power supply, low cost, long period of maintenance- free; ? Support the definite-time of over current protection, fast break protection, earth protection and inverse-time over current protection, the setting of protection value is flexible; ? With zero sequence current sampling terminal, the zero sequence current transformer can be connected, and judgment of single phase to ground fault is more accurate; ? With USB port, can update the program through USB port; ? Adjusting all constant value by DIP switch or PDA hand held terminal; ? With the gateway interface and gateway interface, easy to trip and confirm of the emergency; ? With emergency tripping from distant AC220V. ? Can set the parameters directly, the operation is simple.

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