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GE 369-HI-0-M-0-D-0-E
Product Name: GE Multilin 369 Series Motor Management Relay
Product Introduction: The 369-HI-0-M-0-D-0-E is a microprocessor-based motor protection relay from the GE Multilin 369 series, designed for comprehensive protection, monitoring, control, and diagnostics of medium and large induction and synchronous motors. The suffix configuration indicates: HI (high-range control power 85–265 VAC / 90–300 VDC), M (Modbus RTU RS-485 + Ethernet 10BaseT communications), and E (50/60 Hz operation).
Detailed content
Technical Specifications & Performance Parameters:
- Control Power: HI range — 85–265 VAC / 90–300 VDC, 50/60 Hz
- Power Consumption: ≤ 15 W
- CT Inputs: 5 A nominal (standard phase CT)
- RTD Inputs: 6 RTD channels (Pt100) for winding and bearing temperature
- Communications: RS-485 Modbus RTU + Ethernet (10/100Base-TX, Modbus TCP/IP, IEC 61850)
- Digital I/O: Digital inputs, programmable relay outputs
- HMI: LED status indicators
- Enclosure: Standard panel mount
- Operating Temperature: –20 °C to +70 °C (relay variants rated up to –40 °C to +70 °C)
- Protection Class: IP40 (front panel)
Protection Functions:
- Current protection: Phase overcurrent (instantaneous / definite time / inverse time), ground overcurrent, negative sequence overcurrent (phase loss / imbalance detection), locked rotor protection
- Temperature protection: RTD overtemperature with thermal memory and load curve modeling
- Voltage protection: Phase overvoltage, undervoltage, voltage imbalance
- Other protections: Motor overload thermal simulation (I²t curve), start-up timeout, underload (pump dry-run detection), stall protection
Metering Capabilities: Three-phase current, line voltage, active/reactive power, power factor, energy (kWh), and harmonics up to the 15th order.
Application Scenarios: Pumps, fans, compressors, conveyors, motor control centers (MCC), power generation auxiliaries, oil & gas, mining conveyor networks, and industrial manufacturing pumping systems.
Working Principle: The relay continuously samples CT and RTD inputs, computes thermal models based on I²t curves, and evaluates all protection stages. When a fault or abnormal condition is detected, it operates the appropriate relay output and records event/fault data for diagnostics.
Installation Requirements:
- Mount in standard panel cutout with proper sealing for IP40 rating.
- Ensure control power wiring matches the HI range (85–265 VAC / 90–300 VDC).
- Connect CT secondaries, RTD sensors, and digital I/O according to the 369 series wiring diagram.
- Configure IP address, Modbus parameters, and protection settings via EnerVista 369 Setup software.
Usage Notes:
- When replacing this exact model, the Ethernet IP configuration is the most frequent “gotcha” — the IP settings must match the plant’s gateway and subnet mask exactly, or the relay will be invisible on the network.
- Ensure control power is properly fused at the cabinet level before servicing the HI (high-voltage) variant.
- Use an isolated USB-RS-232 dongle when connecting to any RS-232 diagnostic port to avoid grounding issues.
