Overview

The UR-8LH is a CT/VT module from GE Multilin designed for the Universal Relay series, supplying the relay with 4CT/4VT capabilities along with enhanced diagnostic features.

Technical Specifications

• Model Number: UR-8LH
• Manufacturer: General Electric Multilin (GE)
• Weight: approx. 2 lb 9 oz

Dimensions:

• Length: approx. 6 inches
• Width: 7 inches

Functionality:

• Designed to replace existing modules, upgrade current systems, or provide new capabilities to Universal Relays that lack this module.
• Equipped with enhanced diagnostics to verify the integrity of analog signals, ensuring reliable operation.

CT/VT Functionality:

• Scales down current and voltage values to levels manageable by the relay, enabling it to calculate and output relevant current and voltage ratios.
• Critical for identifying hazardous conditions in the system and facilitating appropriate responses.

Diagnostics and Monitoring

• The module employs an advanced algorithm to assess signal integrity.
• Data can be accessed through the front faceplate’s LCD or via a computer using the EnerVista UR software.

Compatibility and Configuration

• The UR-8LH must be paired with a new CPU to avoid hardware mismatch errors, as it is a newer module.
• Compatible with firmware versions of at least 4.0x; older CPUs and CT/VT modules require firmware versions of 3.4x or earlier.
• Supports up to 24 signals for AC power line monitoring.
• Sensitive ground input for ground fault protection is available in certain models (e.g., 8G, 8J, 8M, and 8R).