The GE 469-P1-HI-A20-E-H is a Multilin 469 Motor Management Relay with the added feature of harsh (chemical) environment conformal coating. It provides comprehensive protection, control, and monitoring for medium to large industrial motors. This specific model includes 1 A phase CT secondaries, high-range control power (90-300 VDC or 70-265 VAC), four 4-20 mA analog outputs, and an enhanced front panel display. The “H” suffix denotes the conformal coating for protection in challenging environments.
Product Overview
The GE Multilin 469-P1-HI-A20-E-H is an advanced Motor Management Relay from GE’s highly regarded Multilin 469 series. It’s specifically designed to offer robust protection, sophisticated control, and detailed monitoring for medium to large horsepower three-phase motors in a wide array of industrial and utility applications. What sets the 469-P1-HI-A20-E-H apart is the inclusion of a conformal coating on its internal circuit boards, denoted by the “-H” suffix. This protective layer makes the relay exceptionally resilient to harsh environmental conditions such as dust, moisture, and corrosive chemicals, ensuring prolonged operational life and reliability in demanding industrial settings.
Beyond its environmental resilience, the 469-P1-HI-A20-E-H provides an extensive suite of protective functions, advanced diagnostics, and comprehensive metering capabilities. It meticulously safeguards motors from various faults, including thermal overload, phase and ground overcurrents, voltage irregularities, and even mechanical issues like broken rotor bars. The “P1” indicates compatibility with 1 A phase Current Transformer (CT) secondaries, while “HI” signifies its wide control power range (90-300 VDC or 70-265 VAC). The “A20” denotes its four 4-20 mA analog output capabilities, useful for integrating with other control systems, and “E” refers to an enhanced front panel display, which offers a larger LCD and improved navigation for user convenience. This relay contributes significantly to reducing motor downtime, extending asset lifespan, and improving overall operational efficiency and safety.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 469-P1-HI-A20-E-H |
| Manufacturer | GE Multilin (GE Vernova) |
| Product Type | Motor Management Relay / Motor Protection System |
| Phase Current Inputs | P1 = 1 A phase CT secondaries |
| Control Power | HI = DC: 90 – 300 VDC; AC: 70 – 265 VAC @ 48-62 Hz |
| Analog Outputs | A20 = Four (4) 4-20 mA analog outputs |
| Digital Inputs | 9 opto-isolated inputs |
| Display | E = Enhanced display, larger LCD |
| Special Feature | H = Harsh (chemical) environment conformal coating |
| Communication Ports | RS232, RS485 (Modbus RTU/Half Duplex), Ethernet (optional), DeviceNet (optional) |
| Operating Temperature | -40°C to +60°C |
| Storage Temperature | -40°C to +80°C |
| Humidity | Up to 95% relative humidity (non-condensing) @ 55°C |
| Protection Class | IP40 (front), IP20 (back) |
| Enclosure | Draw-out case construction |
| Certifications | TÜV Rheinland (for certain safety functions) |
Main Features and Advantages
The GE Multilin 469-P1-HI-A20-E-H Motor Management Relay offers a comprehensive set of features and significant advantages, particularly for critical motor applications in challenging environments.
Enhanced Environmental Protection
The defining feature of the 469-P1-HI-A20-E-H is its harsh (chemical) environment conformal coating (indicated by the “-H” suffix). This thin, polymeric layer protects the relay’s internal circuitry from dust, moisture, corrosive gases, and extreme temperatures. This significantly extends the relay’s lifespan and ensures reliable operation in applications where other relays might fail, such as chemical plants, mining operations, or coastal installations.
Comprehensive Motor Protection
This relay provides an exhaustive suite of motor protection functions, including highly accurate thermal overload protection with a sophisticated thermal model that considers cooling time constants and hot/cold safe stall ratios. It also offers protection against phase and ground overcurrents, current unbalance, phase differential protection, under/over voltage, frequency deviations, and overtemperature via RTD inputs. Crucially, it includes advanced motor diagnostics like Motor Current Signature Analysis (MCSA) for broken rotor bar detection, enabling predictive maintenance and preventing costly motor failures.
Advanced Monitoring and Diagnostics
The 469-P1-HI-A20-E-H offers extensive metering capabilities, providing real-time values for currents, voltages, power, power factor, RTD temperatures, and more. It includes an event recorder (storing up to 256 events) and oscillography (waveform capture), which are invaluable tools for post-fault analysis and troubleshooting. This detailed diagnostic data helps reduce troubleshooting time and maintenance costs by quickly pinpointing the root cause of issues.
Flexible Communication and Integration
Equipped with multiple communication ports (RS232, RS485) and supporting protocols like Modbus RTU/TCP/IP, the 469-P1-HI-A20-E-H integrates seamlessly into modern control systems such as DCS and SCADA. This enables remote monitoring, control, and data acquisition, enhancing operational visibility and allowing for centralized management of motor assets. The relay is also supported by GE’s EnerVista 469 Setup software, simplifying configuration and data analysis.
