This generic specification lists the test and measurement procedures which may be selected for use in detail specifications for solid state relays of assessed quality. It specifies the quality assurance procedures to be followed. Relays covered have d.c. control circuits and output ratings not exceeding 100 A. Covers order of precedence, related documents, units, symbols and terminology, preferred values, marking, construction, type of relays, prefixes for the values applicable to relays, control signal values, output values, terms relating to times, structurally similar components, qualification approval procedures, quality conformance inspection, resubmission of rejected lots, certified test records, delivery of relays subjected to tests, supplementary procedures for deliveries