scope:

This blank detail specificaton applies to electromechanical all-or-nothing relays, test schedules 1, 2 and 3 of assessed quality. This blank detail specification gives the tests to be used and the layout to be followed when preparing detail specifications for electromechanical all-or-nothing relays. The test schedules are defined, and the relationship to each other is described in the sectional specification for such relays in IEC Publication 255-19 which selects appropriate tests from IEC Publication 255-7 in accordance with IEC Publication 255-10.