Thermomagnetic system structure

Abstract

The invention discloses a thermomagnetic system structure, and the structure comprises a magnetic trip module and a thermal trip module. The magnetic trip module is disposed on a magnetic trip fixingplate, and the thermal trip fixing plate is disposed on a thermal trip fixing plate. The magnetic trip fixing plate and the thermal trip fixing plate are disposed on a tripping pad plate, and the thermal tripping fixing plate is located between the magnetic tripping fixing plate and the tripping pad plate. The tripping pad plate is connected with the magnetic tripping fixing plate through a support. The tripping pad plate, the magnetic trip fixing plate and the support form an operation space for fixing the thermal trip fixing plate through enclosing. A fixing mechanism for fixing the thermaltrip fixing plate is disposed at one side of the operation space, and the thermal trip fixing plate is pushed into the operation space from the other side to be fixed on the tripping pad plate by thefixing mechanism. The thermal trip fixing plate is pushed into the operation space from one side to be fixed on the tripping pad plate by the fixing mechanism, so the assembly efficiency is high, andthe magnetic trip fixing plate does not need to be disassembled for directly taking down the thermal trip fixing plate, thereby facilitating maintenance.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a thermal-magnetic system structure. Background technique [0002] As an important component of switching appliances, the thermal magnetic system triggers the tripping of the circuit breaker to realize the protection function when the electrical circuit is abnormal, especially for the starter of the motor. The thermal magnetic system includes a magnetic trip module for short circuit protection and for For thermal trip modules with time-delay protection, when assembling a thermal-magnetic system, it is often necessary to stack the thermal trip fixing plate and the magnetic trip fixing plate vertically on the trip pad for positioning, then form a fixed connection, and then pass through the trip pad The plate is fixed to the case of the circuit breaker. However, due to the trend of miniaturization of switching appliances, the thermal magnetic system is often relativ...

AI Technical Summary

Problems solved by technology

However, due to the trend of miniaturization of switching appliances, the thermal magnetic system is often relatively small in size and compact in structure. Not only is the assembly process cumbersome, but it is also prone to inaccurate positioning of the thermal tripping fixing plate, magnetic tripping fixing plate and tripping backing plate. problems, as well as the problem that the connection strength does not meet the requirements, resulting in the thermomagnetic system not being able to trigger the tripping of the switching device when the circuit is abnormal

Moreover, the lever of the magnetic trip module is supported near the thermal trip module through the magnetic trip fixing plate, and the connection strength and accuracy of the lever and the magnetic trip fixing plate itself are very unstable. Under the influence of the high temperature of the thermal trip module The lever can easily come out of the magnetic trip fixing plate, causing the magnetic trip module to fail

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