GE Multilin UR9AH Protective Relay CPU Module

Product Overview

The General Electric UR9AH serves as the primary processing core for the Multilin Universal Relay (UR) series. This high-performance CPU module manages complex logic execution, data acquisition, and communication protocols within power system protection frameworks. By leveraging a high-speed 32-bit architecture, the UR9AH facilitates real-time monitoring and rapid decision-making, ensuring that electrical assets remain protected during transient faults or grid instability.

Core Functional Capabilities

• High-Speed Processing: Equipped with an advanced processor that delivers a 33% increase in computational speed over legacy UR units, enabling faster trip times and more complex algorithmic processing.
• Comprehensive Signal Integration: The module interprets 64 isolated digital inputs and manages 32 solid-state outputs, bridging the gap between field-level analog signals and digital control logic.
• Standardized Communication: Full compliance with IEC 61850-9-2LE and Ethernet routing capabilities ensures seamless interoperability with modern substation automation architectures.
• System Integrity: Designed with SIL 3 certification, the module provides a high level of safety integrity for critical infrastructure, including nuclear and petrochemical facilities.

Technical Specifications

• Manufacturer: General Electric (GE) Multilin
• Model Identification: UR9AH
• Equipment Class: Digital CPU / Controller Module
• Input Voltage Range: 12–250 VDC/AC (Isolated)
• Output Rating: 0–250 VDC/AC (Solid-State)
• Voltage Accuracy: ±0.2%
• Electromagnetic Interference (EMI) Shielding: Up to 10,000 Vrms
• Operating Temperature Range: -40°C to +70°C (-40°F to +158°F)
• Physical Weight:  0.9 kg
• Hardware Interface: Hot-swappable design for reduced Mean Time to Repair (MTTR)

Industrial Applications

Furthermore, the UR9AH is engineered for durability in extreme environments. It is frequently deployed in:

• Power Generation: Managing generator protection and synchronization.
• Oil & Gas: Controlling safety-critical logic on offshore platforms.
• Railway Infrastructure: Providing EMI-resistant signaling control for traction power systems.
• Semiconductor Manufacturing: Ensuring power quality and continuous operation for sensitive production lines.