ABB RET650 Transformer Protection and Control Terminal

Technical Specifications

• Rated Voltage: Up to 250 kV
• Rated Current: Up to 4000 A
• Protection Functions:
  • Differential protection with adaptive ratio braking, 2nd harmonic restraint, and 5th harmonic restraint
  • Low-impedance restricted earth fault protection
  • Overcurrent protection (phase and earth fault)
  • Overvoltage and undervoltage protection
  • Overfrequency and underfrequency protection
  • Negative sequence overcurrent protection
  • Thermal overload protection with two time constants
  • Breaker failure protection
  • Voltage-controlled overcurrent protection
• Measurement Functions:
  • Current, voltage, power, and energy measurements
  • Power factor measurement
  • Harmonic analysis
  • Fault recording and event logging
• Communication Interfaces:
  • Ethernet (IEC 61850, Modbus TCP)
  • Serial ports (RS-232, RS-485)
  • Supports IEC 60870-5-103, DNP3, and PROFIBUS protocols
• Display: Large graphic LCD with customizable single-line diagrams
• Dimensions: 280 mm x 288 mm x 200 mm
• Weight: Approximately 8 kg

Key Features

• High Precision: Utilizes high-precision measuring elements and advanced digital signal processing technology to ensure accurate and reliable measurement data.
• Comprehensive Protection: Offers a wide range of protection functions to meet various application requirements, including primary and backup protection for transformers.
• Flexibility: Provides flexible protection configuration options, allowing users to customize protection parameters and time-current curves according to specific needs.
• Advanced Communication: Supports multiple communication protocols, enabling seamless integration with upper-level systems for remote monitoring and control.
• User-Friendly Interface: Features an intuitive human-machine interface (HMI) with a large graphic LCD display for easy parameter setting, monitoring, and diagnostics.
• Fault Recording: Equipped with a built-in fault recorder that stores historical load data and fault records in COMTRADE format for post-fault analysis.
• Power Quality Monitoring: Monitors voltage fluctuations, voltage imbalance, current harmonics, and voltage harmonics to assess power quality.

Application Scenarios

• Power Generation: Used in power plants for protecting generators, step-up transformers, and auxiliary transformers.
• Substations: Applied in substations for protecting power transformers in transmission and distribution networks.
• Industrial Power Systems: Utilized in industrial facilities such as petrochemical plants, steel mills, and automotive manufacturing plants for reliable power supply and equipment protection.
• Renewable Energy Integration: Supports distributed generation systems by providing protection and control for transformers connected to renewable energy sources like solar and wind power.
• Smart Grid Applications: Enables advanced grid management functions such as wide-area monitoring, adaptive protection, and self-healing through its support for IEC 61850-based communication.