Overview
The GE UR Series Universal Relay, also cataloged as the UR Series Protection Relay Platform, serves as a modular protection and control hardware system utilized to execute electrical protection, monitoring, and automation functions across GE Multilin relay platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR Series Universal Relay |
| Brand | GE Multilin |
| Weight | Depends on chassis and installed modules |
| Dimensions | Available in 4RU and 8RU chassis configurations |
| Operating Temp | -40 deg C to +60 deg C |
| Power Consumption | Depends on selected power supply and installed modules |
| Architecture | Modular rack-based protection and control platform |
| Chassis Type | Horizontal or vertical mounting configurations |
| Protection Functions | Line, transformer, generator, feeder, and busbar protection |
| Communication Protocols | IEC 61850 Edition 2, Modbus RTU/TCP, DNP 3.0, IEC 60870-5-104 |
| Ethernet Interface | 10/100/1000 Mbps copper or fiber optic ports |
| Network Redundancy | PRP, HSR, and RSTP support |
| Event Recording | Digital Fault Recorder (DFR) and Sequence of Events (SOE) logging |
| Metering Accuracy | Class 0.2s energy metering |
| Protection Logic | Programmable FlexLogic control equations |
| Humidity Rating | Up to 95% non-condensing |
| Front Protection Rating | IP54 with installed door or cover |
GE Multilin Modular Protection Architecture
The GE Multilin UR Series uses a configurable hardware architecture with field-replaceable modules, including power supply, CPU, digital I/O, analog I/O, and transducer modules. Therefore, users can configure relay hardware according to protection requirements without changing the complete chassis assembly.
The platform supports protection schemes for L90 line differential relays, T60 transformer protection relays, G60 generator protection relays, F60 feeder protection relays, and B90 bus protection relays. Moreover, the FlexLogic programming environment allows direct configuration of protection sequences, interlocking logic, and control operations.
The UR Series supports deterministic industrial communication through IEC 61850 Edition 2 and IEEE 1588 Precision Time Protocol. In addition, Ethernet interfaces provide integration with substation automation networks using PRP, HSR, and RSTP redundancy methods.
Frequently Asked Questions
Q: Does the GE UR Series support modular hardware replacement?
A: Yes. The UR Series uses a modular chassis structure that allows compatible power, CPU, I/O, and communication modules to be installed according to the selected relay configuration.
Q: What communication networks can the UR Series integrate with?
A: The relay supports IEC 61850 Edition 2, Modbus RTU/TCP, DNP 3.0, and IEC 60870-5-104 communication protocols through available communication interfaces.
Q: How does the UR Series process fault events?
A: The relay records protection events through integrated digital fault recording and sequence-of-events logging functions with time-stamped data acquisition.
Field Installation Guidelines
- Install the relay chassis inside a suitable control panel with sufficient clearance for module access and ventilation.
- Verify power supply compatibility before connecting field wiring to the relay terminals.
- Route communication cables separately from high-voltage power conductors to reduce electromagnetic interference.
- Connect Ethernet shielding and protective grounding according to the substation grounding design.
- Confirm CT and VT wiring polarity before enabling protection functions.
- Verify firmware compatibility between the CPU module, communication modules, and installed I/O modules before commissioning.
