GE 760-P5-G5-S5-HI-A20-R-E

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GE 760-P5-G5-S5-HI-A20-R-E: Feeder Management Protective Relay

Product Brief Description

The GE 760-P5-G5-S5-HI-A20-R-E is a digital protective relay from the GE Multilin 760 series. It offers a comprehensive suite of protection, control, metering, and monitoring functions for electrical distribution feeders. This relay is crucial for maintaining the reliability and safety of power systems by quickly detecting and isolating faults, protecting critical assets like transformers and transmission lines, and providing valuable data for system management.

• Product Type: Feeder Management Protective Relay
• Manufacturer: GE (Multilin, now part of GE Vernova)
• Primary Function: Protection, control, and monitoring of electrical distribution feeders, and backup protection for busbars, transformers, and transmission lines.
• Key Application: Industrial power systems, utility substations, and distributed generation.

Product Detailed Description

In modern electrical grids, ensuring the stable and safe delivery of power is paramount. Protective relays play a critical role in this by acting as the first line of defense against electrical faults. The GE 760-P5-G5-S5-HI-A20-R-E is a high-performance example of such a device, often used in complex power distribution networks.

The detailed part number breaks down the specific configuration of the relay:

• 760: Indicates the product series, the Multilin 760 Feeder Management Relay. The 760 model typically offers advanced logic for reclose/autoreclose applications, making it well-suited for overhead feeders compared to the 750 series.
• P5: Refers to the phase current inputs, typically 5A phase current inputs.
• G5: Refers to the ground current inputs, typically 5A zero-sequence current inputs.
• S5: Refers to the sensitive ground current inputs, typically 5A sensitive ground current inputs.
• HI: Specifies the control power option, indicating high voltage (88-300 VDC or 70-265 VAC at 48-62 Hz).
• A20: Indicates eight 4-20 mA analog outputs. These outputs allow the relay to transmit measured values or status information to other control systems (e.g., DCS, SCADA).
• R: Indicates a red breaker closed LED for clear visual status indication.
• E: Signifies that the relay includes an Ethernet port for system integration and communication.

Key Features and Functions of the GE 760-P5-G5-S5-HI-A20-R-E:

1. Comprehensive Protection: Offers extensive protection functions for feeders, including time and instantaneous overcurrent (50/51, 50N/51N), frequency protection (81U), voltage restraint, reverse power protection, and restricted Earth Fault protection. It also provides backup protection for busbars, transformers, and transmission lines.
2. Advanced Control: Features logic for reclose/autoreclose applications, bus blocking/interlocking schemes, high-speed fault detection for arc flash mitigation, and load shedding based on voltage and frequency elements.
3. Accurate Metering and Monitoring: Provides built-in metering functions (eliminating the need for auxiliary metering devices), including demand and energy monitoring, fault location, breaker condition monitoring (per-phase wear), and VT (Voltage Transformer) failure detection.
4. Extensive I/O: Includes dedicated phase, ground, and sensitive ground current inputs, as well as eight 4-20 mA analog outputs for integration with other systems.
5. Communication Capabilities: Supports various communication protocols such as Modbus RTU, TCP/IP, and DNP 3.0. The “E” in the part number specifically denotes the presence of an Ethernet port (e.g., 10Base-T RJ45).
6. User-Friendly Interface: Features an enhanced backlit display and an improved menu navigation structure for local control and access to metering, status, and settings. Remote control is also possible via communication ports.
7. Diagnostic and Recording Features: Stores event records (up to 512 events with time, date, cause, and system parameters), waveform capture (oscillography), and data logging for detailed troubleshooting and analysis.
8. Robust Design: Built for industrial environments, with optional conformal coating for chemically corrosive and humid environments. It typically comes in a draw-out construction for ease of maintenance and replacement.
9. Software Support: Supported by GE’s EnerVista software suite, which allows for easy setup, configuration, monitoring, and analysis of relay data.

This relay significantly enhances grid stability, reduces operational costs, and minimizes downtime by providing robust protection and comprehensive diagnostics.

Key Features and Core Benefits

• Reliable Feeder Protection: Comprehensive protection functions safeguard distribution feeders, minimizing outages and equipment damage.
• Enhanced Grid Stability: Advanced frequency and voltage-based protection, along with reclose logic, helps maintain power quality and system stability.
• Reduced Operational Costs: Built-in metering and I/O monitoring eliminate auxiliary devices and improve the uptime of auxiliary equipment.
• Faster Troubleshooting: Event reports, waveform capture, and data logging enable quick fault diagnosis and reduced maintenance time.
• Flexible Integration: Supports multiple communication protocols and includes an Ethernet port for seamless integration into various SCADA and control systems.
• Designed for Harsh Environments: Robust construction and optional conformal coating ensure reliable operation in challenging industrial conditions.

Technical Specifications

Application Areas

The GE 760-P5-G5-S5-HI-A20-R-E is widely deployed in various sectors requiring robust electrical protection and control:

• Utility Distribution Systems: Primary and backup protection for distribution feeders in various grounding configurations (solidly grounded, high impedance, resonant).
• Industrial Plants: Protection of critical industrial loads, motors, and transformers.
• Substations: Used in both utility and industrial substations for feeder management.
• Distributed Generation (DG): Interconnect protection for renewable energy sources integrating into the grid.
• Busbar Protection: Implements bus blocking and interlocking schemes.
• High-Speed Fault Detection: For arc flash mitigation applications.
• Load Shedding Schemes: Based on voltage and frequency elements to maintain system stability.

Related Products and Solutions

The GE 760-P5-G5-S5-HI-A20-R-E is part of a broader ecosystem of GE Multilin protection and control devices and software:

• GE Multilin 750 Feeder Management Relay: A related model, often sharing similar features but with some differences in advanced control logic (e.g., reclose/autoreclose).
• GE Multilin SR Family Relays: Other relays in the SR family, such as the 469 Motor Protection System, 489 Generator Protection System, 735/737 Feeder Protection System, and 745 Transformer Protection System.
• EnerVista Software Suite: Comprehensive software tools for configuring, monitoring, and analyzing GE Multilin relays.
• SCADA Systems: Integrates with various Supervisory Control and Data Acquisition (SCADA) systems for remote monitoring and control.
• Communication Converters/Gateways: May be used to integrate the relay into different communication networks if direct Ethernet connection is not feasible.