GE 369B1860G0028

GE 369B1860G0028 is a motor protection relay in the General Electric (GE) Multilin 369 Series, specifically designed for the comprehensive protection, monitoring, and control of high-voltage/low-voltage motors. This relay delivers full-range motor management capabilities, including protection against overload, short circuit, ground fault, and phase imbalance, along with energy monitoring and diagnostics. It is suitable for critical motor applications in industries such as petrochemicals, power generation, and water treatment.

The core values of 369B1860G0028 are as follows:

• Comprehensive Motor Protection: Integrates a thermal model protection system that simulates the motor’s thermal characteristics to prevent damage from overheating.
• High-Precision Measurement: Monitors real-time parameters such as current, voltage, power, and energy with an accuracy of ±0.5%.
• Advanced Communication: Supports protocols including Modbus, Profibus DP, and DeviceNet, enabling seamless integration into DCS/SCADA systems.

Product Specifications

• Product Model: 369B1860G0028
• Manufacturer: General Electric (GE)
• Product Type: Motor Protection Relay
• Rated Current: 5A (CT secondary side)
• Input Voltage: 100-240V AC/DC (power supply)
• Protection Functions: Overload, short circuit, ground fault, phase imbalance, locked rotor, underload
• Measurement Accuracy: ±0.5% (for current and voltage)
• Communication Protocols: Modbus RTU/TCP, Profibus DP, DeviceNet
• Control Outputs: 4× relay outputs (trip, alarm, control)
• Operating Temperature Range: -20°C to +60°C (-4°F to +140°F)
• Protection Class: IP40 (panel mounting)
• Mounting Method: DIN Rail or panel mounting
• Certification Standards: UL 508, IEC 60255, CE

Structure and Components

• Signal Acquisition Unit: Features high-precision CT/PT interfaces, supporting 1A/5A CT input and 0-600V AC voltage measurement.
• DSP Processing Module: Performs real-time calculations of RMS values for current/voltage, power, energy, and harmonic content.
• Protection Logic Unit: Offers programmable protection curves (e.g., I²t overload curve), configurable via the EnerVista 369 software.
• Communication Interface: Includes dual RS-485 (Modbus RTU), Ethernet (Modbus TCP), and optional Profibus/DeviceNet modules.
• Human-Machine Interface (HMI): Equipped with a backlit LCD display for local viewing of parameters, event logs, and real-time data.

Key Features and Advantages

1. Intelligent Motor Protection

• The thermal capacity model calculates the motor’s real-time heating status to avoid false tripping (e.g., from startup inrush current).
• Ground fault protection achieves a sensitivity of 5mA (when using Core Balance CT).

2. Advanced Diagnostics and Monitoring

• Records motor startup curves (current vs. time) to analyze startup performance.
• Includes energy metering functions (kWh, kvarh) to support energy management.

3. Flexible Communication Integration

• Natively supports Modbus TCP, enabling direct Ethernet access to SCADA systems.
• Offers optional Profibus DP or DeviceNet modules to adapt to different network architectures.

4. Industrial-Grade Reliability

• Operates in a wide temperature range of -20°C to +60°C and withstands vibration of 3g @ 100Hz.
• Built-in self-test function for real-time monitoring of hardware health.

Application Fields

• Oil and Gas Industry: Comprehensive protection for motors in compressors and pump sets (e.g., in explosive hazardous areas).
• Power Industry: Monitoring and control of motors in boiler feedwater pumps and fans.
• Water Treatment Industry: Underload protection for large water pumps (to prevent dry running).

Related Products

• 369-HI-P0-G5-E0: Communication module (e.g., for Profibus DP).
• 369-HI-C0-E0: Current transformer (Core Balance CT), used for high-sensitivity ground fault detection.
• EnerVista 369: Configuration software, available for free download.

Installation and Maintenance

Installation Key Points

• Use shielded wires of ≥2.5mm² for CT secondary wiring to avoid induced voltage interference.
• Route communication cables (e.g., RS-485) and power cables in separate layers, with a minimum spacing of 30cm.

Maintenance Recommendations

• Conduct a protection setting verification once a year (using a relay protection tester).
• Regularly clean the heat dissipation holes to prevent dust accumulation from affecting heat dissipation.

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