3results about "Switches with electromagnetic opening" patented technology

Disclosed are fuse devices and electrical systems using the fuse devices, the fuse devices having internal components for causing a fuse blow event when a predetermined current level is reached through the contacts. The internal components may include a levitation actuator that causes separation between one or more of the contacts when the current level approaches the predetermined level. This causes contact levitation and arcing, which increases resistance at the separated contacts. This in turn causes current through the contacts to seek another path, which in embodiments herein is a path to a pyroelectric feature. The current activates the pyroelectric feature, which causes the contacts to separate, placing the fuse device in a "blown fuse" condition where current can no longer flow through the contacts.

The invention relates to a hybrid circuit breaker comprising: a current path (801) including a mechanical switch (805) adapted to have a closed and an open configuration, and a switching path (802) disposed in parallel with the main current path (801) and including a solid-state static switch (806), and wherein the mechanical switch (801) includes a first contact (2), a second contact (3), a first actuation assembly carrying the first contact (2) and including a first piezoelectric actuator (4), a second actuation assembly carrying the second contact (3) and including a second piezoelectric actuator (5), each of the first piezoelectric actuator (4) and the second piezoelectric actuator (5) being configured to deform, particularly under the effect of a change in electric field, along a deformation direction (D) substantially collinear with a longitudinal axis (X1,X2) of the piezoelectric actuator (4, 5), between a retracted state and an extended state. Figure for the abbreviation: Figure 1,

A circuit breaker includes a breaker body housing a circuit and a controller for controlling the circuit. An internal handle mechanism and breaker mechanism in the breaker body have three states. The three states include an ON state wherein the breaker mechanism is in the closed contact state and the internal handle mechanism is in an ON position, an OFF state in which the breaker mechanism is in the open contact state and the internal handle mechanism is in an OFF position, and a TRIPPED state in which the breaker mechanism is in the open contact state and the internal handle mechanism is in a TRIPPED position. The controller and motor are configured to drive the internal handle mechanism. A lockout mechanism is configured to allow the breaker mechanism to lock the breaker mechanism in the TRIPPED state with a lockout tag in a locked position.