IEC 62505-3-3 pdf download Railway applications – Fixed installations – Particular requirements for a.c. switchgear – Part 3-3: Measurement, control and protection devices for specific use in a.c. traction systems – Single-phase inductive voltage transformers 8 Ferro-resonance 8.1 General The following requirements, additional to those of IEC 60044-2:1 997, apply: The structure of railway electrification network may easily generate ferro-resonance...