Overview

The GE Multilin UR-4LH Latching Output Module is a specialized digital I/O card used within the Universal Relay (UR) platform. Designed for high-speed and deterministic control, this module delivers latching outputs that remain in their last state even after power loss, ensuring system integrity during critical events.

Moreover, the UR-4LH supports flexible configuration through GE’s EnerVista UR software, allowing engineers to assign outputs to protection elements, alarms, or automation logic. In addition to its core functionality, the module integrates seamlessly with other UR family devices, enabling scalable and modular protection schemes.

Engineers rely on the UR-4LH for its robust performance in substations, industrial plants, and utility-grade protection systems. Therefore, it plays a vital role in maintaining operational continuity and fault isolation in high-voltage environments.

Technical Data

Typical Applications

• Substation Protection Systems: Provides secure trip and alarm outputs for breakers and transformers.

• Industrial Power Distribution: Coordinates fault isolation and load shedding in manufacturing plants.

• Utility Automation: Interfaces with SCADA and RTU systems for remote control and monitoring.

• Generator Protection: Supports output signaling for overcurrent, differential, and voltage protection.

• Renewable Energy Integration: Used in wind and solar farms for grid synchronization and fault signaling.

For instance, in a high-voltage substation, the UR-4LH can latch trip signals during fault conditions, ensuring that protective actions persist even if the system reboots. In addition, its modular design allows easy replacement and expansion without disrupting operations.

FAQ

Q1: What does “latching output” mean in this module?
A1: It means the output remains in its last state (on or off) even after power loss, ensuring persistent signaling.

Q2: Can the UR-4LH be used with other UR modules?
A2: Yes, it integrates seamlessly with other UR series modules for comprehensive protection and control.

Q3: How is the module configured?
A3: Configuration is done via GE’s EnerVista UR software, which supports flexible logic mapping and diagnostics.

Q4: Is this module suitable for outdoor installations?
A4: It should be housed within a protective relay enclosure rated for environmental exposure.

Q5: What industries commonly use the UR-4LH?
A5: Industries include power utilities, oil & gas, mining, and heavy manufacturing.