Schneider MiCOM P141 feeder management relays

The Schneider MiCOM P141 is a powerful protective relay for the protection, control and monitoring of feeders in power systems. The following are its features and advantages:

Rich protection functions: it has three inverse time current protection for overload, overcurrent and short-circuit, as well as overvoltage, undervoltage, overspeed (flying) and underspeed protection. Among them, the over-speed and under-speed protection will be automatically handled differently according to the generator grid-connected situation.

High measurement accuracy: it can measure parameters such as current, voltage, P, Q, power factor, frequency, zero sequence current, zero sequence voltage, and calculated degree of electricity with high accuracy, providing accurate data for the operation monitoring of power system.

Perfect control circuit: the device comes with anti-tripping circuit, both DC and AC can be equipped with anti-tripping, and the anti-tripping function is simple to lift, which helps to improve the reliability and stability of switchgear.

Flexible logic function: each protection function, relay and open quantity has logic configuration function, which can be set by users on site according to their needs, such as free adjustment of protection action signal output, switching quantity can be set to realize non-electricity protection function and blocking protection function, etc., which can satisfy personalized needs of different users.

Friendly man-machine interface: it adopts large-screen graphic liquid crystal display, dynamically displaying primary system diagram, real-time waveform diagram, fault recording diagram, various electrical parameters and protection information. Graphical Chinese menu with four-digit direction navigation disk, fast and convenient operation, easy for users to set parameters and troubleshooting.

Powerful communication function: it provides dual 485 and Ethernet (optical and electrical) communication interfaces, and the communication protocols support Modbus RTU and Modbus TCP, etc., which can realize the transmission functions of telemetry, telecommunication, remote control, setting and querying of the protection value, working status of the device, SOE event recording and wave recording data, and it is convenient for integration with other systems and remote monitoring.

Self-inspection and wave recording function: It has software and hardware real-time self-inspection and alarm function, which can discover the faults of the device in time. Meanwhile, the fault wave recording function can record the current, voltage, circuit breaker status and protection information before, during and after the fault, and the length of the record is 100 weeks, which provides the basis for users to analyze the fault.