What is BS EN 62199 - Bushings for D.C. application about?   
BS EN 62199 applies to outdoor and indoor bushings of any voltage used on d.c. systems, of capacitance graded or gas insulated types for use as components of oil-filled converter transformers and smoothing reactors, as well as air-to-air d.c. bushings.
BS EN 62199 guidelines refer to IEC 60137 for general terms and conditions and defines the special terms used, operating conditions, ratings, test procedures as well as general mechanical and electrical requirements for bushings for d.c. application. 
Who is BS EN 62199 - Bushings for D.C. application for?  
BS EN 62199 on bushings for D.C. application is useful for:  
- D.C system manufacturers  
- Capacitor graded manufacturers
- Transformer manufacturers
- Quality control personnel 
Why should you use BS EN 62199- Bushings for D.C. application?   
Non-ceramic bushing insulators are widely used in d.c. applications and this standard applies to similar qualification procedures on all types of insulators, except for the artificial pollution test. Preparation of a bushing for an artificial pollution test destroys the surface of a composite insulator and therefore cannot be performed on such bushings.  
BS EN 62199 provides you with ratings and operating conditions of the D.C. application. BS EN 62199 also provides you with general requirements and test requirements. BS EN 62199 provides a type test, routine test, and special tests.
BS EN 62199 helps to provide high-quality bushings for d.c. application.
