2000IEC 60255-5:2000 Electrical relays - Part 5: Insulation coordination for measuring relays and protection equipment; Requirements and tests
1977IEC 60255-5:1977 Electrical relays. Part 5 : Insulation tests for electrical relays
IEC 60255-5:1977 Electrical relays. Part 5 : Insulation tests for electrical relays was changed to IEC 61810-5:1998 Relais Electromecaniques De Tout-Ou-Rien A Temps Non Specifie - Partie 5: Coordination De L?Isolement (Edition 1.0).