This part of IEC 61811 is a sectional specification that covers electromechanical elementary (non-specified time all-or-nothing) relays of assessed quality for industrial application. NOTE: Electromechanical all-or-nothing telecom relays of assessed quality are covered by IEC 61811-50. It is based on the basic relay standard IEC 61810-1 as well as on the generic specification IEC 61811-1 and selects from IEC 61810-7 the appropriate test and measurement procedures to be used in detail specifications derived from this specification. Moreover, it contains a basic test schedule to be used in the preparation of such specifications. Detailed test schedules are given in the blank detail specifications supplementary to this sectional specifcation.