Electromagnetic system for controlling and protecting switching device

Abstract

The invention discloses an electromagnetic system for controlling and protecting a switching device, which is characterized by comprising a shell and a bracket which are detachably connected, a coil framework is arranged between the shell and the bracket, a static iron core is arranged between the shell and the coil framework, a movable iron core is movably arranged between the bracket and the coil framework, and a pressing frame is hinged to the lower part of the bracket. The upper end of the pressing frame can be in linkage with the movable iron core, lower pressing spring seats are arrangedon the two sides of the outer end of the pressing frame, upper pressing spring seats aligned with the lower pressing spring seats are arranged on the bracket, and pressing springs are arranged between the upper pressing spring seats and the lower pressing spring seats. The electromagnetic system of the control and protection switching device is simple in structure, convenient to assemble, more power-saving and longer in service life.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to an electromagnetic system for controlling and protecting switching electrical appliances. Background technique [0002] At present, the electromagnetic system for controlling and protecting switching devices provided on the market generally includes a coil bobbin, a moving iron core pierced through the coil bobbin, and detachable coil suction pieces arranged on both sides of the moving iron core. There is a tension spring between them, and the electromagnetic system parts of the above-mentioned control and protection switchgear are all arranged on the coil frame, the structure is complicated and it is not convenient for assembly and later maintenance, and the reset of the moving iron core is realized by the tension spring, and the force arm is relatively long Moreover, the loss of elastic force is large, and the pull-in voltage is large, which is not conducive to ...

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Problems solved by technology

[0002] At present, the electromagnetic system for controlling and protecting switching devices provided on the market generally includes a coil bobbin, a moving iron core pierced through the coil bobbin, and detachable coil suction pieces arranged on both sides of the moving iron core. There is a tension spring between them, and the electromagnetic system parts of the above-mentioned control and protection switchgear are all arranged on the coil frame, the structure is complicated and it is not convenient for assembly and later maintenance, and the reset of the moving iron core is realized by the tension spring, and the force arm is relatively long Moreover, the loss of elastic force is large, and the pull-in voltage is large, which is not conducive to power saving and reduces the service life of the extension spring

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