The UR9CH features a black plastic housing with an integrated RJ45 Ethernet port on the front panel, facilitating device communication, program uploading/downloading, and remote monitoring. It utilizes a side-mounted latching mechanism for insertion into the backplane of the UR series relay chassis. Its primary applications include relay protection in substations (covering lines, transformers, busbars, and generators), power distribution systems for power plants and industrial/mining enterprises, and protection and control for renewable energy sites (solar PV and wind power).

Key functional highlights:

1. Powered by an Intel Core i7 processor, it serves as the computational core of the UR protection relay system, executing relay protection logic, fault detection algorithms, and control programs.
2. Features onboard Ethernet support for standard power industry protocols such as Modbus and IEC 61850, enabling data exchange with substation SCADA systems and backend monitoring systems.
3. Acquires analog and digital (binary) signals to perform fault detection, event recording, waveform recording, and alarm output.

Note: The UR series supports hot-swapping of the CPU module without requiring changes to I/O or CT/VT acquisition boards, facilitating easy upgrades and maintenance.

Distinctions between CPUs in the same series:

UR9AH: An older-generation basic CPU utilizing the Motorola MVME1727 processor.

UR9BH: A mid-range performance CPU equipped with the PowerPC 604e processor.

UR9CH (the focus of this article): A high-performance, next-generation CPU that supports complex protection logic, large-capacity waveform storage, and IEC 61850.