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GE SR469-P5-HI-A20E Management Relay
GE SR469-P5-HI-A20E
GE SR469-P5-HI-A20-E is a high-end motor management relay under the multi-functional SR-469 series of General Electric (GE). Specifically designed to provide comprehensive protection, monitoring, and control for medium to large high-voltage three-phase induction or synchronous motors, this product serves as a core device to ensure the safe, reliable, and efficient operation of critical rotating assets.
Integrating advanced microprocessor technology, GE SR469-P5-HI-A20-E continuously monitors dozens of motor parameters, including current, voltage, temperature, power, and electrical energy. Leveraging its powerful protection algorithms and programmable logic, it implements complex motor control strategies. Beyond quickly activating protective actions when anomalies such as overload, short circuit, ground fault, locked rotor, imbalance, or underload are detected, it also offers users in-depth equipment health insights and energy management data through its rich communication interfaces and diagnostic functions—ultimately maximizing motor lifespan, optimizing maintenance plans, and reducing unplanned downtime.
Product Parameters
- Product Model: SR469-P5-HI-A20-E
- Manufacturer: General Electric (GE)
- Product Type: Motor Management Relay / Intelligent Motor Protector
- Rated Input Current: 5A (standard, derived from CT secondary side)
- Power Supply Voltage: 24 – 48 VDC / 24 – 240 VAC (self-adaptive)
- Protection Functions: Thermal capacity protection (custom curve), stall protection, short circuit (instantaneous/time-delayed), ground fault (sensitive/directional), phase imbalance/phase loss, under/over voltage, underpower, start-up timeout, multiple start limitation, t² protection
- Measured Parameters: Current, voltage, active/reactive/apparent power, electrical energy, power factor, frequency, thermal capacity utilization rate, operating time, peak current
- Control Inputs: 5 programmable digital inputs
- Control Outputs: 4 programmable relay outputs (Form C, configurable)
- Communication Protocols: Built-in dual-port Ethernet (supports Modbus TCP/IP, DNP3, IEC 61850 MMS/GOOSE)
- Display Interface: High-resolution backlit liquid crystal display (LCD) with navigation buttons
- Operating Temperature: -40°C to +70°C
- Mounting Method: Panel mounting
Structure and Composition
GE SR469-P5-HI-A20-E features a robust industrial-grade housing design. Its front panel integrates a high-resolution graphic LCD and multiple navigation buttons, which are used to view real-time data, alarm information, event records, and perform configuration operations. At its core is a high-performance 32-bit microprocessor, responsible for signal acquisition, complex mathematical calculations, execution of protection logic, and processing of communication protocols.
On the input side, detachable terminal blocks connect secondary side signals from current transformers (CTs) and voltage transformers (PTs), as well as PT100 resistance temperature detector (RTD) signals from the motor stator or bearings. On the output side, multiple programmable relays (for tripping, alarming, and control) and optically isolated digital inputs (for remote start/stop, reset, etc.) are provided.
Notably, the -A20-E suffix of this model clearly indicates that it comes standard with a dual-port Ethernet interface, supporting advanced network protocols and ring network functions—making it a core marker of its network capabilities.
Key Features and Advantages
1. Comprehensive and Advanced Protection Functions
GE SR469-P5-HI-A20-E offers one of the most comprehensive motor protection suites in the industry. Its customizable thermal model (TMC), compliant with IEEE 620/IEC 60255 standards, accurately simulates the thermal characteristics of motors. Advanced fault detection functions—such as sensitive ground fault protection (50G/51G), negative sequence current protection (46), and stall protection (14)—can issue alarms or trigger tripping before potential issues lead to catastrophic failures, providing all-round protection for motors.
2. Powerful Communication and System Integration Capabilities
The standard dual-port Ethernet supports modern protocols like Modbus TCP/IP and IEC 61850 (GOOSE/MMS), enabling seamless integration into the latest SCADA, DCS, and substation automation systems. Support for IEC 61850 GOOSE allows it to participate in fast station-level interlocking and realize distributed collaboration of protection functions. This strong connectivity makes it an ideal choice for smart grid and Industrial Internet of Things (IIoT) applications.
3. Rich Diagnostic and Energy Efficiency Management Tools
This relay acts as a powerful monitoring and data logging center. It can store time-stamped trend data, sequence of events (SOE) records, and fault wave records—providing invaluable data for fault analysis and predictive maintenance. Additionally, it accurately measures parameters such as kW, kWh, and kVARh, allowing users to monitor energy consumption, calculate efficiency, and implement cost allocation.
Application Fields
GE SR469-P5-HI-A20-E is widely used in heavy industry sectors with high requirements for motor control and protection.
- In the power industry, it protects critical auxiliary equipment in power plants, such as induced draft fans, forced draft fans, circulating water pumps, and condensate pumps.
- In the oil and gas industry, it safeguards pipeline booster pumps, compressors, and subsea injection pumps to ensure production continuity and safety.
- In mining, chemical engineering, water treatment, and large industrial complexes, SR469-P5-HI-A20-E is the preferred solution for intelligent motor management in critical scenarios with medium and high-voltage motors—preventing production disruptions and significant economic losses caused by motor failures.
Installation and Maintenance
Pre-Installation Preparation
Before installing GE SR469-P5-HI-A20-E, all power supplies must be disconnected and verified as de-energized. Ensure the secondary side of CTs is reliably short-circuited until wiring is ready. Carefully read the manual, and plan protection settings and communication configurations (e.g., IP address) based on motor nameplate data and specific application requirements. Prepare appropriate tools and ensure the installation environment is clean and dry.
Maintenance Recommendations
- Daily maintenance primarily involves regularly checking the relay display for alarm information and confirming that ventilation holes are not blocked.
- Use its built-in data logging function to regularly download trend data and event records for analysis, identifying potential issues.
- Periodically verify that protection settings still meet operational requirements. Remote monitoring and diagnosis via the Ethernet port is the most efficient method.
- After long-term operation, it is recommended that professionals conduct functional tests on the relay—simulating faults to ensure normal operation of its tripping logic and output contacts. Keep the firmware updated to the latest version.
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Core Product Range
Control & Signal Modules
- Central Control Units: PLC, DCS, CPU modules
- Interface & Communication Modules: Input/Output (AI/AO/DI/DO) modules, fiber optic interface boards, communication modules
- Functional Boards & Cards: I/O boards, counting boards, data acquisition cards, gas turbine cards, FIM cards, embedded cards
Drive & Peripheral Equipment
- Servo drives, servo motors
- Industrial displays, industrial keyboards
- Controllers, encoders, regulators, sensors
Power & Connection Components
- Power modules, thyristor modules, terminal modules
- Wires, cables, power modules, control modules
Our Competitive Advantages
- Industry Expertise & Inventory Strength: With long-term experience in the industrial control sector, we maintain a large stock of in-demand products to ensure fast delivery.
- Leading Market Position: We stand out with competitive pricing and strict quality control, guaranteeing reliable performance of all products.
- Comprehensive Product Coverage: Beyond standard models, we also supply rare and discontinued automation parts, meeting diverse customer needs.
- Assured After-Sales Service: Any product with quality issues can be replaced free of charge within 15 days of purchase, providing peace of mind for your operations.
Applicable Industries
Our automation spare parts are widely used in key sectors including:
Iron & steel, hydropower, nuclear power, power generation, glass manufacturing, tire factories, rubber production, thermal power generation, papermaking, shipping, navigation, and more.
Iron & steel, hydropower, nuclear power, power generation, glass manufacturing, tire factories, rubber production, thermal power generation, papermaking, shipping, navigation, and more.
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