Electrical protective circuit for electric equipment in house or vehicle has switch contact and manually released test switching circuit fitted inside housing

摘要

The switch assembly has a housing (3) containing electrical contacts (7,8) and an operating system (6) for a switch contact (E) between them. The test switch assembly (4) includes a resistor (5) and connections (11,12) to further circuits. The switch may be used with direct current, alternating current and three-phase circuits.