ABB REL670
ABB REL670 is an advanced **line differential protection relay** developed by ABB, part of its **RELion® protection and control product series**. Designed for medium- and high-voltage power systems, it delivers highly reliable protection, monitoring, and control functions. Below are its key features and applications:
### **1. Key Functions**
- **Line Differential Protection**:
Utilizes high-performance differential algorithms (e.g., sampled value differential) to provide fast and reliable line protection, suitable for both short lines and long-distance transmission lines.
- **Backup Protection Functions**:
Includes distance protection, directional overcurrent protection, zero-sequence protection, etc., ensuring system safety in case of primary protection failure.
- **Fault Location and Distance Measurement**:
Accurately identifies fault locations to minimize recovery time.
- **Adaptive Protection**:
Automatically adjusts protection parameters based on system conditions (e.g., load variations, topology changes).
- **Communication Support**:
Supports IEC 61850 (GOOSE, SV), IEC 60870-5-103/104, DNP3.0, and other protocols for seamless integration with SCADA or other intelligent devices.
### **2. Technical Features**
- **Hardware Platform**:
Modular design with support for multiple I/O configurations, including analog inputs, digital inputs/outputs, and fiber-optic interfaces.
- **High Sampling Rate**:
High-precision AD conversion and rapid data processing ensure quick and accurate protection responses.
- **Real-Time Monitoring and Recording**:
Built-in fault recording (COMTRADE format) and event logging for simplified fault analysis.
- **Human-Machine Interface (HMI)**:
Equipped with an LCD display and keypad for local operation, configurable via PC software (e.g., ABB PCM600).
### **3. Typical Applications**
- **Transmission Line Protection**:
Suitable for overhead lines or cables at 110kV and above.
- **Substation Automation**:
Serves as a core protection unit in smart substations, supporting IEC 61850 communication.
- **Renewable Energy Integration**:
Adapts to grid connection protection requirements for distributed energy sources like wind and solar power.
### **4. Advantages**
- **High Reliability**: Redundant design and rigorous testing (e.g., IEC 60255 certification).
- **Flexibility**: Supports multiple protection schemes and communication protocols for diverse grid architectures.
- **Ease of Maintenance**: Comprehensive diagnostic tools and remote management capabilities.
### **5. Related Models**
- **REL670**: Focused on line differential protection.
- **REF670**: Designed for feeder protection.
- **RET670**: Specialized in transformer protection.
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