Current limiting structure and circuit breaker
A circuit breaker and main circuit technology, which is applied to the operation/release mechanism of the protection switch, adjusting the conditions of the protection switch, etc. simple structure
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Embodiment 1
[0064] For the current limiting structure of this embodiment, see Figure 1 to Figure 5 As shown, it includes a variable resistance assembly 1 and a linkage mechanism 2 . One end of the variable resistance assembly 1 is suitable for electrical connection with the heating element 5 in the circuit breaker, and the other end is electrically connected with the moving contact 3 in the circuit breaker to be connected in series in the main circuit of the circuit breaker. One end of the linkage mechanism 2 is linked to the variable resistor assembly 1 , and the other end is linked to the moving contact 3 . The variable resistance assembly 1 has a first state in which the resistance value tends to be zero when the moving contact 3 is connected to the static contact 4 in the circuit breaker, and when the main circuit current is too large, the driven contact 3 and the static contact The driving force of the contact 4 is repulsed and the resistance value increases to the second state. I...
Embodiment 2
[0073] The circuit breaker of this embodiment, such as Figure 1 to Figure 8 As shown, it includes the housing 7, the contact assembly installed in the housing 7, the operating mechanism 6 installed on the housing 7 for driving the contact assembly to close / open, and the current limiting structure in Embodiment 1. . The contact assembly is arranged in the housing 7 and includes a moving contact 3 and a static contact 4 . The operating mechanism 6 is linked with the movable contact 3 through a linkage assembly. The current limiting structure is installed in the installation cavity of the housing 7 for installing the contact assembly, and is linked to the movable contact 3 of the contact assembly through the linkage mechanism 2 . Since the above-mentioned current limiting structure is adopted, at least the advantages of the current limiting structure of the above-mentioned embodiment 1 are obtained, and details will not be repeated here. At the same time, due to the current-l...
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