Ключевые слова:
All-or-nothing relays, Relays, Switches, Switchgear, Electromechanical devices, Protective relays, Electronic equipment and components, Quality assurance systems, Assessed quality, Qualification approval, Approval testing, Inspection, Visual inspection (testing), Specification (approval), Definitions, Testing conditions, Electrical testing, Electrical measurement, Performance testing, Environmental testing, Thermal testing, Mechanical testing, Endurance testing, Electric load cycling tests, Magnetic measurement, Chemical-resistance tests, Circuits, Solderability testing, Test equipment