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Protection device for an automatic circuit breaker and automatic circuit breaker comprising this device
Protection device for an automatic circuit breaker and automatic circuit breaker comprising this device
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机译:用于自动断路器的保护装置和包括该装置的自动断路器
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摘要
The present invention relates to a magnetic protection device, in particular for an automatic circuit breaker or a disconnecting switch, preferably for use in low voltage systems. The invention also relates to an automatic circuit breaker comprising this device. The protection device (1) according to the invention comprises a low voltage circuit breaker comprising an air gap magnetic circuit (T), provided with a first portion (10) forming a first surface (11) of said air gap (T) and a second portion (20) forming a second surface (21) of the air gap (T). The first portion (10) constitutes a fixed section of the magnetic circuit, while the second portion (20) constitutes a moving section of the magnetic circuit. The magnetic circuit also comprises a flexible portion (30) that connects the first portion (10) to the second portion (20) with continuity, forming an intermediate section of magnetic circuit interposed between the fixed section and the moving section. The third flexible portion (30) advantageously allows a relative movement of the second surface (21) of the air gap (T) with respect to said first surface (11). In its essential form, the protection device (1) comprises an actuation element (50) associated with the second portion (20) of the magnetic circuit for the purpose of contacting a trip device of a circuit breaker to which the protective device is applied.
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