Abstract: The invention discloses a powder leakage monitoring device and a powder leakage monitoring method. The powder leakage monitoring device comprises light field camera, 3D PTZ (3-Dimensional Pan/Tilt/Zoom) and computer. Wherein, the light field camera records original light field images of monitored area; the 3D PTZ under the light field camera adjusts the shooting angle of the light field camera when it rotates according to the set direction; and the computer respectively connects to the light field camera and the 3D PTZ, which generates refocused images corresponding to the original light field images, and determines the spatial coordinates of the powder leakage point and the hazard range of the powder leakage in the monitored area according to the refocused images and the shooting angle. Therefore, the range and accuracy of powder leakage monitoring are both increased by using this invention.

Abstract: A contactor includes: a frame; a stationary contact; a movable contact movable between a closed position and an open position, wherein, in the closed position, the movable contact and the stationary contact are connected such that the contactor is closed, and in the open position, the movable contact and the stationary contact are disconnected such that the contactor is open; and a reset mechanism including a counter force spring, the counter force spring being a torsion spring used to bias the movable contact toward the open position, wherein the torsion spring is an integral component including a body portion having a longitudinal axis, a middle leg extending from the body portion and two torsion arms positioned at two ends of the body portion, and the torsion arms are arranged at two opposite sides of the movable contact. Also provided is an electrical control cabinet including the contactor.

Abstract: A breaker is provided including: a first stationary contact having a first stationary contact portion; a movable contact having a first movable contact portion; an actuating member to actuate the movable contact; a first arc extinguishing device; a first arc running piece extending from a first arc running end portion arranged adjacent to the first stationary contact portion to a second arc running end portion through the first arc extinguishing device; and an arc guiding piece having a first arc guiding section extending in the first direction, the first arc guiding section being arranged between the movable contact and the first arc extinguishing device in a second direction perpendicular to the first direction. The second arc running end portion and the first arc guiding section are arranged at opposite sides of the first arc extinguishing device in the second direction. A contactor including the breaker is further provided.

Abstract: A modular contactor. The modular contactor includes a driving module (1), an intermediate connection module (2), a breaking module (3), an upper application interface module (4), and a lower application interface module (5); the driving module (1) is detachably connected to a first side of the intermediate connection module (2); the breaking module (3) is detachably connected to a second side of the intermediate connection module (2) ; the upper application interface module (4) is detachably connected to the top of the breaking module (3) so as to be electrically connected to upper static contacts of the multiple breaking units; the lower application interface module (5) is detachably connected to the bottom of the breaking module (3) so as to be electrically connected to lower static contacts of the multiple breaking units.

Abstract: A breaker is provided which is used for controlling only one current path. The breaker includes a contact assembly, a movable contact and a housing accommodating the contact assembly and the actuating member. The contact assembly includes: a first stationary contact having a first stationary contact portion; a second stationary contact having a second stationary contact portion; and a movable contact having a first movable contact portion and a second movable contact portion which are respectively located at both ends of the movable contact. The actuating member is connected to the movable contact to actuate the movable contact in a first direction to move between an open position and a closed position. A breaker assembly and a contact having the breaker are also provided.

Abstract: A modular breaking unit with a holder-guiding assembly, wherein: the modular breaking unit includes a casing unit; a holder for holding a movable contact of the modular breaking unit is accommodated in the casing unit; the movable contact of the modular breaking unit is mounted on the movable contact holder; the holder-guiding assembly is installed in the casing unit and arranged to support and guide the movable contact holder to move between an open position and a closed position; the holder-guiding assembly is made of thermoplastic material; the movable contact holder is made of thermosetting plastic material. A contactor including at least one said modular breaking units.

Abstract: A modular breaking unit with a holder-guiding assembly, wherein: the modular breaking unit includes a casing unit; a holder for holding a movable contact of the modular breaking unit is accommodated in the casing unit; the movable contact of the modular breaking unit is mounted on the movable contact holder; the holder-guiding assembly is installed in the casing unit and arranged to support and guide the movable contact holder to move between an open position and a closed position; the holder-guiding assembly is made of thermoplastic material; the movable contact holder is made of thermosetting plastic material. A contactor including at least one said modular breaking units.