In 2021, a European contractor was fined €50,000 after an audit revealed they used a "repacked" PDF of IEC 60071-1 for a 220kV substation design. The repack was missing critical annexes on atmospheric corrections, leading to underspecified insulators.
: Technical changes, additions, and deletions are highlighted for easy reference. iec 600771 pdf repack
The current version (IEC 60077-1:2017) includes several significant changes from earlier releases: In 2021, a European contractor was fined €50,000
: The limits and testing procedures for temperature rises were reviewed and updated. a European contractor was fined €50