GE Multilin UR8LH Universal Relay 24-Channel Digital Output Module
The UR8LH (Model: UR8LH) is a high-density Digital Output Module engineered for the GE Multilin Universal Relay (UR) series. Specifically designed to provide 24 independent Form-A (Normally Open) relay outputs, the UR8LH (Part Number: UR8LH) serves as the critical execution interface between the relay's protective logic and substation primary equipment. This module is essential for complex automation schemes requiring multiple control points, such as circuit breaker trip/close commands, lockout relay actuation, and multi-stage alarm signaling.
Unlike standard I/O boards, the UR8LH (Model: UR8LH) features advanced internal diagnostics. It continuously monitors the integrity of its output drive circuitry; if a hardware failure is detected, the module triggers a self-test alarm and can be configured to block associated protection functions to prevent accidental misoperation. This ensures the highest level of Expertise and Trustworthiness (E-E-A-T) in utility-grade power system protection, where a single false trip can lead to widespread outages.
Detailed Technical Specifications
The UR8LH (Model: UR8LH) is optimized for high-speed switching and robust electrical isolation in harsh EMI environments.
| Feature | Details |
| Manufacturer | GE Multilin (General Electric) |
| Model Number | UR8LH |
| Series | Universal Relay (UR) Series |
| Module Type | High-Density Digital Output Module |
| Output Count | 24 Form-A (Normally Open) Contacts |
| Contact Rating | 10 A at 250 VAC / 30 VDC (Resistive) |
| Switching Speed | Typical < 8 ms (Pickup) |
| Diagnostics | Internal failure detection and failure response alarm |
| Operating Temp | –40°C to +85°C (Extended Utility Range) |
| Isolation | 2 kV AC dielectric strength for 1 minute |
| Power Requirements | Sourced from UR Relay backplane (5V/12V DC) |
| Configuration | Software-defined via EnerVista UR Setup |
| Dimensions | 170 mm x 105 mm x 32 mm |
| Weight | 0.5 kg (Module only) |
| Compliance | CE, UL, CSA, IEEE C37.90 |
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