GE Multilin UR-9GH UR Series CPU Module

Description

The GE Multilin UR-9GH centrally processes protection logic, communication tasks, and system diagnostics as a core processing hub within the Universal Relay (UR) platform. Specifically engineered as a replacement component for vertical hardware configurations, this CPU Module delivers coordinated calculation capacity to manage extensive electrical substation protection automation. The UR-9GH integrates dedicated serial and network communication cards to route plant parameters via industrial fieldbuses, incorporating a 9G communication architecture that establishes simultaneous links over optical networks and legacy multidrop copper lines. Additionally, it features an integrated 1A / 5A ground current transformer secondary input channel (1A/5A Ground CT) directly on the processing unit assembly. This specialized analog input enables the module to acquire local neutral or residual currents for critical zero-sequence overcurrent protection calculations, optimizing control response and field data routing across high-voltage and medium-voltage power distribution assets.

Features

• Coordinates centralized mathematical calculation routines and real-time protection algorithms within UR-series chassis.
• Integrates a hardware-level 1 A / 5 A ground current transformer interface directly into the controller assembly.
• Equipped with a 9G communication configuration featuring independent dual-media network transceivers.
• Runs standard Modbus TCP/IP and DNP 3.0 automation protocols simultaneously for SCADA and DCS master interfaces.
• Supports high-speed oscillography capture, detailed sequence-of-events logging, and precision metering.
• Designed specifically to match vertical mechanical orientation relay units for drop-in component replacement.

Applications

• Substation automation and supervisory control data acquisition (SCADA) systems.
• Electrical fault diagnostics, localized ground fault monitoring, and zero-sequence current tracking.
• Power generation utility networks requiring concurrent dual-protocol Ethernet and serial communications.
• Retrofit or maintenance replacement within existing UR series vertical protection systems.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Control Power Safety: Completely isolate and disconnect the control power source feeding the UR rack before extracting or executing an upgrade with the CPU card.
• Orientation Verification: Confirm the replacement unit matches the mechanical framework of the rack; this module is intended exclusively for vertical assembly housings.
• ESD Mitigation: Technicians must connect an anti-static wrist strap to a verified system ground point before handling the circuit boards of the controller.
• Firmware Configuration: After seating the module, check that the existing relay setting files and firmware revision profiles align with the new 9G configuration to avoid processing