Product Overview

The UR8CH is a plug-in control and measurement module for GE Multilin Universal Relays (UR Series). It is used to interface standard secondary transformer signals with the relay by accepting current transformer (CT) and voltage transformer (VT) inputs for protection, metering, and monitoring functions. By providing a dedicated, relay-integrated input path for current and voltage sensing, the module supports accurate acquisition of power system quantities used for protective elements and operational visibility.

The UR8CH is typically applied in medium- and high-voltage switchgear and substation protection panels where consistent CT/VT signal handling and serviceable modular hardware are required. This part has a documented discontinuation date, so it is commonly sourced for maintenance replacement and installed-base support.

Key Technical Characteristics

• Brand: GE

• Product Family: Multilin UR (Universal Relay)

• Module Category: UR Control Module / CT/VT Input Module

• Model / Order Number: UR8CH

• Primary Function: Interfaces CT and VT secondary signals to UR Series relays for measurement and protection processing

• Transformer Input Capability (as specified):

• Phase CT Inputs: 3 channels, 1 A or 5 A nominal

• Ground CT Input: 1 channel, 1 A or 5 A nominal

• Supports standard CT secondary classes used in protection panels

• Operational Characteristics (typical for UR relay input modules):

• Provides isolation and a stable input interface for relay measurement circuits

• Designed for continuous-duty operation in protection and control enclosures

• Supports relay diagnostics and event/measurement functions through the host UR relay firmware

• Engineering and Supply Data:

• Condition: Brand New

• Availability: In Stock

• System Type: PLC / Protection Relay System

• Product Origin: USA

• Discontinued On: Dec 31, 2018

• Minimum Order Quantity: 1

• HS Code: 8537101190

• Weight: 0.84 kg

• Dimensions: 6.0 × 19.5 × 17.2 cm

• Configuration and Setup:

• Configured through the host UR relay settings environment (commonly EnerVista toolset, relay-dependent)

• Final scaling, CT ratios, and protection settings are defined at the relay level, not on the module hardware

Industrial Applications

• Feeder protection relays requiring CT and VT measurement inputs

• Transformer protection and monitoring panels in substations

• Generator and motor protection systems using UR Series relays

• Switchgear retrofits where existing UR relay racks remain installed

• Maintenance replacement for legacy UR8CH modules to restore accurate current/voltage sensing