PMF890 is a new generation of DC protection and measurement and control device developed by Xuchang Intelligent, which is mainly suitable for DC power supply systems such as trams, subways, and light rails. It meets the protection and control requirements of rectifiers and feeder cabinets in terms of reliability, real-time performance, and safety. PMF890 uses multiple powerful microprocessors to realize protection and control functions respectively, and provides Ethernet, RS485, RS232 and other interfaces to meet various needs

Product introduction:

● Time record capacity 1280, time record telesignal resolution ≤1ms;

● Fault recording information: It can store 50 voltage and current waveform records with time stamps when the protection action caused by various faults, and the length of each waveform record is 2.5s;

● Local operation: It has a local operation panel, a large-screen LCD with full Chinese display, and can display a system diagram, switch position information, and analog quantity information on the spot. The device provides a full Chinese interface, which is convenient for authorized users to view and customize the parameter setting values ​​of various functions, and facilitate fault diagnosis and local operation;

· Microcomputer operation: The front panel has a debugging serial port that can be connected to a PC. On a PC equipped with the PMF890 dialogue tool, the device can be fully diagnosed and configured, data and waveforms can be read, and PMF890 can be transferred to the PC. All setting parameters are saved in one file for easy access;

● Communication interface: provides a wealth of information exchange interfaces, including RS-232, RS-485, Ethernet and other interface expansions;

● Adaptable to Modbus TCP/IP, IEC103, IEC104, 61850 and other communication protocols, convenient for access to substation control systems;

● This device is a digital protection device, and the integrated circuit uses industrial products with high stability and reliability;

● Strong anti-interference performance, and the protection hardware design adopts a variety of isolation and shielding measures;

● The hardware and software design is standardized and modularized, which is convenient for on-site maintenance. On the basis of standardized hardware design, various standardized software modular configurations are adopted to form different protection function configurations. If the user needs more protection functions, the design unit can upgrade simply and reliably.