GE UR 6PH Digital I/O Module

Description

GE UR 6PH Digital I/O Module

Product Dimensions：

The GE UR 6PH (Universal Relay) is a high-performance, modular protective relay part of the General Electric (GE) Multilin Universal Relay (UR) series. Specifically, the 6PH designation refers to the hardware configuration for a Phase-Comparison Protection System, typically used for high-speed protection of transmission lines.

Product Detailed Description

The UR 6PH is a digital protective relay designed to perform sub-cycle phase-comparison protection. It uses high-speed peer-to-peer communication to compare the phase angles of currents at each end of a transmission line. If the phase angles indicate a fault within the protected zone, the relay initiates a trip command. It is built on the UR platform, which supports modularity, allowing users to swap or add modules for communication, I/O, or CPU upgrades.

Technical Parameters

Product Advantages

• Ultra-High-Speed Operation: Ideal for critical transmission lines where stability depends on rapid fault clearing.
• Superior Security: Phase comparison is inherently immune to power swings and stable during external faults or CT saturation.
• Modular Architecture: The “Universal Relay” chassis allows for field-upgradable hardware, reducing spare parts inventory and extending the system’s life cycle.
• Advanced Diagnostics: Includes comprehensive oscillography, event logging (up to 1024 events), and data logging for detailed post-fault analysis.
• Cyber Security: Features AAA (Authentication, Authorization, and Accounting) and encrypted communication to meet NERC® CIP requirements.

Important Considerations (Precautions)

• Communication Latency: Since this is a comparison-based system, the communication link between the two relays at either end of the line must be stable and have low, predictable latency.
• CT Requirements: While the relay is robust, ensure that the Current Transformers (CTs) at both ends of the line are correctly matched in terms of ratio and polarity for accurate phase comparison.
• Firmware Synchronization: When operating in a pair (local and remote), it is highly recommended to maintain the same firmware version on both UR 6PH devices to ensure logic consistency.
• Electrostatic Discharge (ESD): When handling or swapping modules within the UR chassis, always use an ESD wrist strap to prevent damage to the sensitive microprocessor components.

Product Applications

• High-Voltage Transmission Lines: Used as primary protection for overhead lines and underground cables where distance relays may be difficult to set (e.g., short lines or series-compensated lines).
• Multi-Terminal Lines: Can be configured to protect lines with three or more terminals.
• Pilot Protection Schemes: Functions effectively in pilot-wire or fiber-optic-based communication schemes for differential-style protection without the need for voltage inputs (V_T signals).
• Industrial Interties: Protecting the connection points between large industrial facilities and the utility grid.

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