1723results about "Protective switch terminals/connections" patented technology

The invention discloses a plug-in miniature circuit breaker, which comprises a housing (A), a leading-out terminal (B), a leading-in terminal (C), a push button mechanism (D), an operating mechanism (G), an overload protection mechanism (H), an arc extinguishing mechanism (I), a short circuit protection mechanism (J) and a signal end (K), wherein the plug-in miniature circuit breaker is characterized in that the push button mechanism (D) is linked with a locking device (E) and a fixed unlocking device (F). According to the plug-in miniature circuit breaker, a connection line can be directly inserted, so that the disconnection operation is simple and convenient; meanwhile, the circuit breaker cannot be freely closed outside a cabinet and can be freely opened and closed in the cabinet through improving a locking mechanism, the circuit breaker cannot be pulled out of the cabinet through parts except for a push button and the circuit breaker cannot be easily taken out from the cabinet through pulling the push button, so that the installation and use security of the circuit breaker is ensured; the circuit breaker is suitable for a specific small space; and the problem that local temperature rise of the circuit breaker is too high is solved through rearranging the internal structure of the circuit breaker.

The invention relates to a series coupling inductance high-voltage direct current breaker and a control method thereof. The breaker comprises a change-over switch, a switching circuit and an energy consumption device which are connected in series. The change-over switch adopts a mechanical switch, the switching circuit adopts a coupling circuit, and the energy consumption device adopts a lightning arrester. The high-voltage direct current breaker is connected with a control circuit, when a failure happens, the mechanical switch detects failure current, and transfers the failure current to the coupling circuit. The failure current charges a capacitor in the coupling circuit, flows over current change of a conductance L1, generates change current which is opposite to the failure current in direction and flows through a conductance L2. The failure current and the change current are overlaid, and the overlaid current makes a zero crossing point on a main circuit of the mechanical switch to cut off the mechanical switch. Voltage on two ends of the capacitor reaches operation voltage of the lighting arrester so that the lightning arrester acts and energy is released from the lightning arrester. The series coupling inductance high-voltage direct current breaker can meet requirements of quick cutting off of the failure current, can realize non-arc cutting-off of the mechanical switch, and the control method is simple and easy to operate, and complete in function.