This product inherits the industry-leading functional system of the 469 series, equipped with a large backlit enhanced LCD display, optimized menu navigation structure, and the dedicated enerVista 469 configuration software. Meanwhile, it maintains the same mounting dimensions as previous models, making it suitable for harsh industrial environments such as petrochemical, power, mining, and metallurgical industries.It provides full-operating-condition safety protection for motors, enabling millisecond-level response and accurate fault tripping, which greatly reduces unplanned equipment downtime.
related documents
GENERAL ELECTRIC Multilin 469.pdf
Core Technical Specifications
Phase Current Input: P5 version, 5A phase CT secondary input
Control Power Supply: HI version, 88~300 V DC / 70~265 V AC, operating frequency 48~62 Hz
Analog Output: A20 version, 8 channels 4~20 mA analog output
Display Module: E version, enhanced backlit LCD, 40 clearly visible characters, with screen on/off control
Firmware Version: 4.00 (Boot code 3.00, Hardware version H)
Measurement Accuracy: Current ±0.5%, Voltage ±0.2%
Communication Interfaces: Dual Ethernet, RS485, USB, supporting Modbus TCP, IEC 61850, DNP3.0 and other protocols
Event / Fault Recording: 2048 time-stamped event records, 16-channel analog + 32-channel digital fault recording
Operating Temperature: -40°C to +70°C
Protection Rating: Front panel IP54, housing IP20
Physical Characteristics: Panel / rack mounting, dimensions 230 mm×165 mm×80 mm, weight approx. 2.2 kg
Model Code Definition
- 469: Basic unit, core platform of GE Multilin 469 Motor Management Relay;
- P5: Phase current input rating, suitable for 5A CT secondary (P1 rating is also available for 1A CT);
- HI: High-range control power supply, suitable for wide voltage range industrial sites (LO rating is the low-voltage version);
- A20: Analog output rating, 8-channel 4~20 mA standard industrial analog output (A1 rating is 0~1 mA output);
- E: Enhanced display module with large backlit LCD (B rating is the basic display version).
Core Functions & Product Highlights
1. Comprehensive Motor Protection
- Electrical Fault Protection: Overcurrent, short-circuit, ground fault, underload/overload, and stall protection. Supports customizable protection thresholds and time delays to avoid maloperation during motor startup.
- Voltage Anomaly Protection: Upgraded undervoltage protection element with new UNDERVOLTAGE TRIP MODE setpoint, supporting 1-phase / 3-phase tripping modes (factory default: 1-phase). Effectively prevents false tripping caused by VT fuse failures and improves protection security.
- Phase Protection: Phase imbalance, phase loss, and phase reversal protection to prevent motor winding damage caused by incorrect grid wiring.
- Temperature Protection: Supports PT100, K-type thermocouple and other temperature sensors, monitors motor winding and bearing temperature in real time, and triggers alarm/trip when thresholds are exceeded.
2. Optimized Hardware & Operation Experience
- Enhanced Display & Keypad: 40-character backlit LCD, clearly visible in complex lighting environments; redesigned keypad layout with a new MENU key for one-touch switching between setpoints, actual values, and target information, replacing the previous SETPOINTS/ACTUAL/NEXT keys; new MESSAGE left/right keys for submenu navigation, while up/down keys remain for in-menu navigation; numeric, enter, and help keys are fully compatible; LED test can be activated by long-pressing the HELP key.
- Hardware Compatibility: Enhanced (E version) and basic (B version) share identical mounting dimensions and details, allowing direct replacement of legacy units without reworking installation space.
- Harsh Environment Adaptation: Wide operating temperature range of -40°C to +70°C, front panel IP54 dustproof and waterproof, housing with anti-EMI and anti-corrosion properties, suitable for complex industrial scenarios such as petrochemical and mining.
3. Intelligent Software & Communication Capabilities
- Enhanced Waveform Analysis: Supports movable cursors, adjustable scaling, multi-channel cursor values and differences in one window, and playback with adjustable sampling rate to accurately reconstruct fault waveforms.
- Efficient Configuration: Quick Connect simplifies serial communication; supports configuring multiple 469 relays in a single interface and opening multiple information windows simultaneously to improve batch operation and maintenance efficiency.
- Full Compatibility: Fully compatible with legacy configuration files from 469PC software, supporting firmware versions 2.4x/2.5x/2.6x/2.8x/4.0x.
- Remote Monitoring & Integration: Supports mainstream industrial protocols including Modbus TCP and IEC 61850, enabling seamless integration with PLC/DCS systems for remote protection configuration, real-time operation data upload, and remote fault reset. Dual Ethernet ports support communication redundancy to ensure uninterrupted data transmission.
4. Precise Monitoring & Fault Diagnosis
- Real-time Parameter Acquisition: 10 ms high-speed sampling of three-phase current, voltage, power factor, active/reactive power and other electrical parameters; supports 8-channel temperature input with acquisition accuracy up to ±0.2%.
- Fault Recording & Analysis: Stores 2048 time-stamped event records with millisecond precision. Fault recording covers 16 analog channels and 32 digital channels, capturing complete electrical parameters before and after faults to provide accurate evidence for engineers.
- Self-diagnosis: Periodic self-test of sampling circuits, output loops, and communication modules; timely alarm in case of internal failure to prevent protection function loss.
Typical Applications
- Petrochemical Industry: Protection of compressors and oil transfer pumps in refineries and chemical plants. Resists corrosion from sulfur-containing gases and marine salt spray; remote monitoring reduces on-site maintenance workload.
- Power Industry: Protection of auxiliary motors such as induced draft fans and feed water pumps in thermal power plants and hydropower plants. Fast fault response avoids impacts on unit generation efficiency.
- Mining & Metallurgy: Protection of mine hoists, blast furnace blowers, and rolling mill motors. Adapts to heavy load fluctuations, high dust, and frequent voltage variations on site.
- Municipal Engineering: Protection of aeration fans and sewage pump motors in wastewater treatment plants. Underload protection detects pump dry-running in time; temperature protection prevents overheating during long-term operation.
General Industry: Motor protection for pump stations, fans, conveyors, and other equipment. Supports coordinated control with multiple starting methods such as star-delta starting and soft starting.
Installation & Maintenance Guidelines
- Installation Specifications: Install away from strong magnetic field equipment such as large transformers and contactors to avoid electromagnetic interference. Strictly distinguish phases for current/voltage transformer wiring. Route power cables and signal cables separately. Use shielded cables for temperature and communication signals with single-end grounding.
- Commissioning Guidelines: Customize protection thresholds according to motor rated parameters (power, voltage, current, starting method). Simulate faults such as overcurrent and phase loss using test equipment to verify the accuracy of protection operations. After configuring communication parameters, test the stability of data upload and remote control.
- Routine Maintenance: Regularly inspect panel indications and terminal connections for looseness or overheating. Perform remote firmware upgrade and automatic fault report generation via enerVista software. Supports hot-plug maintenance to minimize downtime.
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