NB/T 42021-2013 (English Version) PDF

Scope: This standard specifies the terms and definitions, usage conditions, product models, connections, technical requirements, test items and methods, marking, packaging, transportation and storage of three-phase dry-type converter transformers for high-voltage variable frequency speed regulation. This standard is mainly applicable to three-phase dry-type converter transformers (hereinafter referred to as "converter transformers") used on the input side of high-voltage variable frequency speed control systems. The voltage level of its grid-side windings is generally 3kV~35kV, and the voltage of a single winding on the valve side is generally No more than 2.5kV.

NB/T 42021-2013 Referenced Document

GB 1094.1 Power transformers.Part 1: General*， 2013-12-17 Update
GB 1094.11 Power transformers- Part 11: Dry-type transformers
GB 1094.5 Power transformers.Part 5:Ability to withstand short circuit
GB 4208 Degrees of protection provided by enclosure(IP code)
GB/T 1094.12 Power transformers.Part 12: Loading guide for dry-type power transformers*， 2013-12-17 Update
GB/T 12668.4 Adjustable speed electrical power drive systems.Part 4: General requirements. Rating specifications for a.c.power drive systems above 1000 V a.c.and not exceeding 35kV
GB/T 18494.1 Converter transformers.Part 1:Transformers for industrial applications*， 2014-09-03 Update
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 3859.1 Semiconductor converters.General requirements and line commutated converters.Part 1-1:Specification of basic requirements
JB/T 10088 6kV~1000kV power transformer sound level*， 2017-04-01 Update
JB/T 3837 Method for compiling standard models of transformer products*， 2016-10-22 Update

2013 NB/T 42021-2013 Dry-type converter transformers for high voltage frequency control