1. Core Parameters

2. Product Features

• High-speed and Accurate Protection Logic: Advanced algorithms are adopted to effectively brake motor starting current and second harmonic, which can block the starting current at 15% fundamental current, quickly identify and isolate faults.
• Multiple Communication Capabilities: In addition to the traditional Modbus RTU protocol, it also supports precise synchronous communication based on IEEE 1588v2 PTP protocol, suitable for modern smart grid and industrial internet applications.
• Flexible Installation and Maintenance: Modular design supports quick DIN rail installation, easy replacement during maintenance, and reduces system downtime.
• Strong Compatibility: Specifically designed for GE Multilin series protection relays, it can be seamlessly integrated with other GE products, and is widely used in chemical, petroleum, electronics, aerospace and other industries.

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3. Structure and Composition

• Core Processing Unit (CPU): Responsible for executing protection logic algorithms, data calculation and signal processing.
• Input/Output Terminals: Including analog input (current, voltage), digital input (status) and relay output (trip signal).
• Communication Interface: Such as RS-485 interface and optical fiber interface, used for communication with upper computer or other protection equipment.
• Power Supply Module: Provides the DC power required by the module itself, usually with built-in power management function.

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4. Main Application Fields

• Motor Protection: Protects three-phase motors from faults such as phase-to-phase short circuit, ground short circuit, overload, phase loss and phase sequence error.
• Transformer Protection: Used to detect internal faults, load abnormalities and external short circuits of transformers.
• Power System Automation: As the core node of the distribution automation system, it participates in feeder differential protection and line fault location.
• Industrial Automation Control: In the automatic production line, it cooperates with PLC and SCADA systems to realize intelligent monitoring of equipment.

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5. Installation and Maintenance Guide

Installation Steps

1. Confirm Power Supply: Check whether the on-site power supply voltage (usually 220V or 380V) is within the rated range of the equipment.
2. Select Installation Method: Choose DIN rail installation or panel fixing according to the on-site space.
3. Wiring: Strictly connect the power cord, input signal line (CT current transformer, PT voltage transformer) and output relay line according to the schematic diagram.
4. Power-on Inspection: After turning on the power, check whether the equipment indicator lights are normal and confirm that the communication interface (such as RS-485) is connected correctly.

Maintenance Points

1. Regularly Check Wiring: Especially the secondary side wiring of the CT current transformer, to avoid misoperation caused by loose wiring.
2. Firmware Upgrade: Regularly check and upgrade the protection logic firmware through GE’s intelligent electrical software (such as Midas or Multilin system) to obtain the latest protection algorithms.
3. Environmental Cleaning: Ensure that the module’s heat dissipation holes are unobstructed to prevent overheating caused by dust accumulation.