IEC 62505-3-1 pdf download Railway applications – Fixed installations – Particular requirements for a.c. switchgear – Part 3-1: Measurement, control and protection devices for specific use in a.c. traction systems – Application guide 1 Scope This part of IEC 62505 provides assistance, guidance and requirements in the design of protection, control and measuring systems in a.c. installations at traction voltages...