BS IEC IEEE 65700-19-03-2014 Bushings for DC application.
This International Standard applies to outdoor and indoor bushings of any voltage used on DC 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 DC bushings. This standard does not apply to the following:
• cable terminations (potheads);
• bushings for instrument transformers:
• bushings for test power supplies:
• bushings applied with gaseous insulation (other than air at atmospheric pressure) external to the bushing:
• bushings for industrial application:
• bushings for traction application:
• bushings for distribution class transformers.
This standard makes reference 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 DC application.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050, international Elect rotechnical Vocabulary (1EV). Available from:
IEC 60060-1:2010, High-voltage test techniques — Part 1: General definitions and test requirements
IEC 6007 1-1, Insulation co-ordination — Part 1: Definitions, principles and rules
IEC 6007 1-5, Insulation co-ordination — Part 5: Procedures for high-voltage direct current (HVDC) converter stations
IEC 60076-1. Power Transformers — Part 1: General
IEC 60076-2, Power Transformers — Part 2: Temperature rise for liquid-immersed transformers
IEC 60076-7, Power Transformers — Part 7: Loading guide for oil-immersed power transformers
lEG 60137:2008, Insulated bushings for alternating voltages above 1000 V
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60137, IEEE Std C57.19.00, iEC 60050-471 and the IEEE Standards Dictionary Online, as well as the following,apply.
3.1.1 DC bushing
bushing subject to DC voltage stress, i.e. bushings applied to the valve winding side of a converter transformer, bushings applied to a DC smoothing reactor, wall bushing or a bushing applied to a converter valve.BS IEC IEEE 65700 pdf download.