Solenoid type electromagnetic trip

Abstract

The invention relates to a solenoid type electromagnetic trip, which belongs to the technical field of the low-voltage apparatus. The solenoid type electromagnetic trip comprises a knob, an adjusting rod, a spring, a moving iron core, a static iron core, a coil, a concentrating flux plate and a magnetic yoke and is characterized in that a push rod pivotally arranged at the upper end part of the magnetic yoke is also included, wherein, one end of the spring is connected with the adjusting rod, the other end of the spring is connected with the push rod, and the upper end of the moving iron core is movably connected with the push rod after penetrating the concentrating flux plate. The invention has the advantages that the linear regulation of the current setting value for the short circuit action is realized by adjusting the length of the spring through the knob; since the adjusting screw component is arranged on the magnetic yoke, the magnetic gap can be adjusted finely, the inconsistency of the current setting values of all the trips due to the parts and the assembly is eliminated, and the consistency of the initial states of all the trips is ensured; and at least one hanging hook is arranged on the upper edge of the push rod, so that the specification of the spring is reduced when the multi-gear adjustment is realized.

Description

Technical field [0001] The invention relates to a solenoid type electromagnetic release for a molded case circuit breaker, which is an improvement on the structure of the existing solenoid type electromagnetic release and belongs to the technical field of low-voltage electrical appliances. Background technique [0002] At present, the existing solenoid type electromagnetic trip unit is structured by figure 1 It is disclosed that it mainly includes a moving iron core 4, a static iron core 41, a spring 3, a coil 44, and a yoke 5. The spring 3 is installed between the moving iron core 4 and the static iron core 41, and is arranged for Inside the plastic sleeve 43 that insulates the moving and static iron cores 4, 41 and the coil 44, this structure has the disadvantage that the setting value of the short-circuit operating current is not adjustable. [0003] In addition, US invention patent No. 5467069 discloses "an adjustable circuit breaker device", which uses a solenoid type elect...

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Problems solved by technology

[0002] At present, the existing solenoid type electromagnetic tripper has a structure consisting of figure 1 As disclosed, it mainly includes a moving iron core 4, a static iron core 41, a spring 3, a coil 44, and a yoke 5. The spring 3 is installed between the moving iron core 4 and the static iron core 41, and is arranged for Inside the plastic sleeve 43 that insulates between the moving and static iron cores 4, 41 and the coil 44, the disadvantage of this structure is that the setting value of the short-circuit action current cannot be adjusted

But one of the shortcomings is that the adjustment of the magnetic gap is not easy to control, and the linearity is not good, so the one-time pass rate is very low in the actual mass production line; It is easy to cause inconsistency in the initial state between the releases of each phase in the circuit breaker

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