What is EN 61869-2:2020?

Introduction

EN61869-2:2020 is a technical standard that outlines specifications for instrument transformers used in electrical power systems. This standard, published by the International Electrotechnical Commission (IEC), provides guidelines and requirements for the design, construction, and performance of these transformers. Understanding EN61869-2:2020 is crucial for manufacturers, engineers, and technicians involved in the development, installation, and maintenance of power systems.

Key Features and Requirements

EN61869-2:2020 defines several important features and requirements for instrument transformers. Firstly, it specifies the accuracy classes for various types of transformers, such as current transformers (CTs) and voltage transformers (VTs). These accuracy classes determine the maximum permissible errors in the transformers' measurements under specified conditions.

The standard also outlines the thermal rating factor, which indicates how much additional load can be applied to the transformer without exceeding its temperature limits. This factor ensures safe operation and prevents overheating.

Additionally, EN61869-2:2020 covers requirements for the mechanical design and dimensions of instrument transformers. It includes specifications for insulation level, creepage distances, and clearances to ensure proper isolation and safety.

Testing and Certification

To ensure compliance with EN61869-2:2020, instrument transformers undergo rigorous testing procedures. The standard specifies various tests, including insulation resistance, partial discharge, and temperature rise tests. These tests verify the transformer's performance and validate its ability to meet the specified requirements.

Certification of instrument transformers is provided by accredited bodies that assess and confirm compliance with EN61869-2:2020. Manufacturers must obtain certification to demonstrate that their products meet the standard's criteria and performance levels.

Benefits and Implications

EN61869-2:2020 plays a vital role in ensuring the safety, reliability, and accuracy of instrument transformers in power systems. By adhering to this standard, manufacturers can produce high-quality transformers that deliver precise measurements under all operating conditions. Engineers and technicians can rely on these transformers for accurate data analysis, monitoring, and protection of electrical systems.

The use of certified instrument transformers complying with EN61869-2:2020 also facilitates interoperability between different equipment and applications. This compatibility allows for seamless integration into existing power systems and simplifies maintenance and troubleshooting procedures.

In conclusion, EN61869-2:2020 sets the benchmark for instrument transformer design and performance. By strictly following this standard, stakeholders in the power industry can ensure the efficiency, accuracy, and overall reliability of electrical systems.