1VCF750090802 REF542PLUS

Description

Parameter Specifications

Power Supply: It can operate on a wide range of power supply voltages, typically 85 – 265 V AC or 100 – 300 V DC. This wide input range allows for flexible installation in different electrical environments.
Measurement Accuracy: It offers high – accuracy measurement of electrical parameters. For current and voltage measurements, the accuracy can reach up to ±0.2% under normal operating conditions, ensuring precise monitoring and protection.
Communication Interfaces: Equipped with multiple communication interfaces, including Ethernet, RS – 485, and IEC 61850. These interfaces enable seamless integration with substation automation systems and other devices for data exchange and remote control.
Protection Functions: It has a comprehensive set of protection functions, such as over – current protection, over – voltage protection, under – voltage protection, and differential protection. These functions can be customized and configured according to specific application requirements.

Applications

Power Substations: It is widely used in power substations for the protection and monitoring of transformers, feeders, and busbars. It can quickly detect faults and isolate the faulty section to prevent the spread of the fault and ensure the safety of the power grid.
Industrial Power Systems: In industrial power systems, it can be used to protect and control high – voltage and medium – voltage electrical equipment, such as motors, generators, and switchgear.
Renewable Energy Power Plants: In wind farms and solar power plants, it can monitor and protect the power generation equipment and the connection to the grid, ensuring the stable operation of renewable energy systems.

Weight and Dimensions

Weight: Approximately 5 – 7 kg, which is relatively light considering its functionality, making it easy to handle and install.
Dimensions: The typical dimensions are around 300 mm (height) x 250 mm (width) x 150 mm (depth). Its compact size allows for installation in standard substation cabinets.
Features
Advanced Algorithm: It uses advanced protection algorithms, such as digital signal processing and artificial intelligence – based algorithms, to improve the speed and accuracy of fault detection and protection.
User – Friendly Interface: It has a user – friendly interface with a large LCD display and intuitive menu navigation. Operators can easily configure the protection settings, view measurement data, and diagnose faults.
Self – Diagnosis Function: The device has a self – diagnosis function that can continuously monitor its own operation status. It can detect internal faults and provide early warnings, reducing the risk of unexpected failures.

Stability and Reliability

High – Quality Components: It is built with high – quality electronic components and a robust enclosure. These components are designed to withstand harsh environmental conditions, such as high temperatures, humidity, and electromagnetic interference.
Redundancy Design: Some versions may incorporate redundancy design in power supply and communication channels. This ensures continuous operation even in the event of a single – point failure, enhancing the overall reliability of the system.
Long – Term Testing: ABB conducts extensive long – term testing on the REF542PLUS to ensure its stability and reliability. It has been proven in numerous practical applications over many years.

Practical Case

In a large – scale power substation, the 1VCF750090802 REF542PLUS is installed to protect a 110 kV transformer. One day, a short – circuit fault occurred in the transformer due to insulation damage. The REF542PLUS quickly detected the abnormal increase in current and voltage through its high – accuracy measurement and protection functions. It immediately issued a trip command to the circuit breaker, isolating the faulty transformer from the power grid within milliseconds. This timely action prevented further damage to the transformer and the spread of the fault to other parts of the power grid, ensuring the safe and stable operation of the entire substation. The stability and reliability of the REF542PLUS played a crucial role in minimizing the impact of the fault and reducing downtime.