IEC 60255-22-4:1992 Electrical relays; part 22: electrical disturbance tests for measuring relays and protection equipment; section 4: fast transient disturbance test
2008IEC 60255-22-4:2008 Measuring relays and protection equipment - Part 22-4: Electrical disturbance tests - Electrical fast transient/burst immunity test
2002IEC 60255-22-4:2002 Electrical relays - Part 22-4: Electrical disturbance tests for measuring relays and protection equipment; Electrical fast transient/burst immunity test
1992IEC 60255-22-4:1992 Electrical relays; part 22: electrical disturbance tests for measuring relays and protection equipment; section 4: fast transient disturbance test