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Thermal trip device, switching device, thermal magnetic circuit breaker and method for protecting electrical circuit from damage

A technology of tripping device and protection circuit, applied in circuits, electrical switches, snap-action devices, etc., can solve the problems of complicated and time-consuming calibration screws

Inactive Publication Date: 2015-08-12
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calibration screws require complex and time-consuming calibration by the consumer or end user or operator during the calibration process and thus require special skills related to the field of application, etc.

Method used

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  • Thermal trip device, switching device, thermal magnetic circuit breaker and method for protecting electrical circuit from damage
  • Thermal trip device, switching device, thermal magnetic circuit breaker and method for protecting electrical circuit from damage
  • Thermal trip device, switching device, thermal magnetic circuit breaker and method for protecting electrical circuit from damage

Examples

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Embodiment Construction

[0039] exist figure 1 , a side view of a bimetallic element 1 is shown, wherein the bimetallic element 1 has a respective first end 1.1 or lower end 1.1 and a respective second end 1.2 or upper end 1.2. The bimetal element 1 is heated at a temperature of 80° C., wherein only small deflections of the bimetal element 1 are triggered. This means that the second end 1.2 of the bimetal element 1 cannot contact the contact area of ​​the trip device 2 in order to unlock the trip device 2 to interrupt the current flow. The first end 1.1 may be arranged at a not shown current conducting element or heater element in order to capture the heat generated by the current flowing through the current conducting element.

[0040] Such as figure 2 As shown in , at a temperature of 150° C., the second end 1.2 of the bimetal element 1 can contact the trip device 2 in order to trigger the circuit breaker mechanism. This means that sufficient corresponding bending or deflection of the bimetal el...

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Abstract

A thermal trip device 10 of a thermal magnet circuit breaker for protecting an electrical circuit from damage by overload has a bimetal element 1 arranged with its first end 1.1 at a current conductive element 5, and its second end 1.2 next to a tripping device 2. A snap action device 20 having a preloaded flat spring 3 provides a force transmission from the bimetal element to the tripping device. A switching device 30 with this thermal trip device interrupts a current flow, and a thermal magnetic circuit breaker with this switching device protects an electrical circuit from damage caused by overload or short circuit. A method for protecting an electric circuit from damage by overload by means of a thermal trip device 10 of a thermal magnet circuit breaker is also provided.

Description

technical field [0001] The invention relates to a thermal trip device for a thermal magnetic circuit breaker, wherein the thermal trip device has at least a bimetal element and a momentary device. The invention also relates to a switching device for interrupting the flow of electric current and having at least a current-conducting element, a tripping device, a bimetallic element and / or a momentary device. Furthermore, the invention relates, on the one hand, to a thermal-magnetic circuit breaker with a switching device as described above and, on the other hand, to a method of protecting an electrical circuit against overload damage by means of a thermal tripping device of a thermal-magnetic circuit breaker. Background technique [0002] Essentially, thermal magnetic circuit breakers are known as manually or automatically operated electrical switches designed to protect electrical circuits against damage, for example due to overload or short circuits. Its basic function is to...

Claims

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Application Information

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IPC IPC(8): H01H71/16
CPCH01H71/40H01H5/18H01H71/16
Inventor A. 卡里略索托L. M. 弗兰科卡巴莱罗
Owner SIEMENS AG
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