Operational Restrictions on use of FSKII Circuit Breakers
Issued to: All Network Rail line managers, safety professionals and accredited contractors
Ref: NRA24-09
Date of issue: 30/09/2024
Location: National
Contact: Dom Banham-Hall, Network Technical Head Distribution HV/LV (Acting)
Overview
• During Test before Earth of an isolation between Finnieston and Rutherglen in Scotland, it became apparent that one of the electrical sections was still live.
• Subsequent investigations have found that a Circuit Breaker, which is an ABB supplied FSKII Circuit Breaker (top photo), had failed in the closed position.