BS IEC 61378-3:2015

What is BS IEC 61378-3 – Converter transformers about? 

BS IEC 61378-3 is an international standard that discusses the application guide for converter transformers. BS IEC 61378-3 provides information to users about specific topics related to industrial and HVDC converter transformers with design, construction, testing and operating conditions differing from conventional transformers used in power systems. In addition, it is the aim of the present part of IEC 61378 to provide manufacturers with the technical background that forms the basis for the principles used within IEC 61378-1 and IEC 61378-2. 

Who is BS IEC 61378-3 – Converter transformers for? 

BS IEC 61378-3 on Converter transformers applies to: 

• Manufacturer of converter transformer 
• Electrical engineer 
• Quality testing personnel 

Why should you use BS IEC 61378-3 – Converter transformers? 

The converter transformers are designed to withstand DC voltage stresses and increased eddy current losses due to harmonic currents. 

BS IEC 61378-3 provides a maintenance procedure for HVDC transformers that require maintenance to a high standard. The item that requires particular attention is on-load tap-changes and valve-side bushings. This also simultaneously helps in monitoring and on-site investigations. 

As a user of BS IEC 61378-3, you can be ensured of the maintenance required for the Converter transformers. 

What’s changed since the last update? 

BS IEC 61378-3:2015 is the second edition that includes the following significant technical changes with respect to the previous edition: 

• Revision of clause on losses to reflect the changes introduced by the second edition of IEC 61378-1 
• Addition of a new clause about design review of converter transformer for both industrial and HVDC applications 
• Addition of content for transformer connected to voltage source converters 
• Reference to the work of CIGRE JWG A2/B4.28 on HVDC transformers.