Timed by-pass switch with verification of restoration of the bypass circuit.

摘要

Timed switch device applicable to an electrical user apparatus, which can be activated by a consent signal generated by a safety circuit, wherein there are a plurality of electrical safety switches arranged in series with each other. This consent signal is generated only when all such switches cause electrical continuity in the circuit. Said device comprises a pair of electrical connection leads (P) which are positioned in said safety circuit one upstream and one downstream of said series of safety switches, short-circuiting it when a short-circuit breaker (2) is activated which places such two leads P in electrical contact, the switch (2) being controlled by a special control circuit (3), a signaling circuit (4) for a plurality of acoustic and/or visual indicators of the status of the user apparatus, a power supply circuit (5) for the short circuit breaker (2) and for the control (3) and signaling (4) circuits.