1. Product Overview

2. Main Technical Parameters

3. Product Features

3.1 Professional Protection Functions

• Specially designed for generators and stators, delivering high-precision earth fault protection.
• Adopts multi-frequency admittance protection technology to effectively improve protection sensitivity and selectivity.
• Supports directional and non-directional overcurrent protection as well as earth fault protection.

3.2 Excellent Environmental Adaptability

• Wide temperature operating range from -40°C to +85°C, suitable for extreme industrial environments.
• Equipped with a robust and durable housing structure to withstand harsh working conditions.
• Features dustproof, moisture-proof and vibration-resistant properties for stable long-term operation.

3.3 Flexible Integration and Expansion

• Compatible with REX011 injection transformer to form a complete and integrated protection solution.
• Plug-in and pull-out design simplifies the commissioning, installation and maintenance of switchgear equipment.
• Supports multiple communication protocols, including Modbus RTU, Modbus TCP, RS-232 and RS-485.

3.4 High-Performance Processor

• Built-in 32-bit microprocessor with a running speed of 100MHz, ensuring efficient operation.
• Memory configuration: 256 MB RAM + 512 KB ROM.
• Enables high-precision measurement and rapid fault response to ensure power system safety.

4. Structure and Composition

4.1 Hardware Composition

• Main Protection Unit: Integrated with core protection algorithms and high-performance processor to realize all core protection functions.
• I/O Interface Module: 32 digital input and output points; 8 analog input and output points.
• Communication Interfaces: RS232, Ethernet and USB 2.0 interfaces, supporting diverse data transmission and device connection.
• Display Module: Optional large graphic display for convenient local data viewing and device operation.

4.2 Supporting Components

• REX011 Injection Transformer: Auxiliary device for enhancing earth fault protection performance.
• Optional Additional Card: RTD sensor or thermistor element input card is optional, used for direct temperature measurement of bearings and windings in key motor projects.
• Mounting Guide Rail: Supports standard DIN rail mounting for flexible installation.

5. Application Fields

6. Installation and Maintenance

6.1 Installation Instructions

6.1.1 Installation Method

• Adopts a draw-out plug-in design, enabling quick insertion and removal of relay plugs for convenient operation.
• Supports standard DIN rail mounting, suitable for electrical cabinets with limited installation space.

6.1.2 Wiring Requirements

• Power supply voltage: DC 24V ± 20% or 36-312V DC.
• Ensure correct connection with the REX011 earth fault transformer.
• All wiring operations shall be implemented in accordance with ABB standard wiring diagrams.

6.1.3 Environmental Requirements

• Keep the ambient operating temperature within the range of -40°C to +85°C.
• Avoid installation in environments with high humidity and corrosive gas.
• The installation position shall be far away from strong electromagnetic interference sources to ensure stable device operation.