Tag: UR9AH

General Electric Multilin’s UR-9AH is a CPU module designed to be installed in the Universal Relay family. It provides relay protection elements by providing the relay with logic algorithms, logic gates, timers and latches. The CPU module is also capable of connecting with other modules within the relay, such as CT/VT modules, to help determine the parameters collected by the module. It is important to note that the new CT/VT module must be used with the new CT/VT module, while the old CT/VT module must be used with the old CPU module. Users who do not match these factors correctly will receive DSP errors or hardware mismatches from the system. The CPU module does not require a ground surge connection.

The number of CPU modules released is quite large, so potential buyers should carefully read the options included in the Universal Relays manual before purchasing. For example, some CPU modules support Parallel Redundancy Protocol (PRP), an Ethernet network protocol standard that ensures efficient failover against any network component failure. Users should purchase the CPU module that best meets their specific system needs.

Frequently Asked Questions about UR-9AH
What type of module is the relationship between UR-9AH and Multilin GE series universal relays? Which firmware versions is it compatible with?
The UR-9AH is classified as a CPU module for the Multilin GE family of general-purpose relays, such as F35 feeder protection systems, G60 generator management relays or N60 for network stability and synchronous phasor measurements. UR (Universal Relays) combines many devices into one integrated relay system, providing greater efficiency and convenience to the end user. The UR-9AH is a CPU model in the UR relay. Each UR relay also contains a power supply, an inter-relay communication, a CT/VT input, a digital input/output, a sensor input/output, a communication switch, and an IEC process bus. Order specification functions can be selected from different hardware modules and software options. The UR-9AH is an older CPU (9A, 9C, or 9D). The only descriptions specified by UR-9AH are RS485 and RS485 (Modbus RTU, DNP). The newer CPU module that matches this feature is the 9E version. Since the UR-9AH is an older model, the CT/VT must also be an older version (8A, 8B, 8C, or 8D) in the UR F35 feeder protection system.