Delay-adjustable breaker

Abstract

The invention discloses a delay-adjustable breaker which comprises a transmission piece, a rotating adjustment device, a releasing device, thermomagnetic systems with adjustable triggering pieces and an adjustment piece. The adjustment piece can rotate through a rotating hole and is installed on the transmission piece in a linearly-moved mode. An adjustment groove of the adjustment piece is mechanically coupled with an adjustment rod of the rotating adjustment device, an adjustment face of the adjustment piece is mechanically coupled with a transmission face on the transmission piece, and a trigger part of the adjustment piece is mechanically coupled with a releasing rod or a triggered piece on the releasing device. A first distance adjustment mechanism is arranged between the adjustment face of the adjustment piece and the transmission face of the transmission piece, and / or a second distance adjustment mechanism is arranged between the trigger part of the adjustment piece and the releasing rod or the triggered piece of the releasing device, so that the effective distance for adjusting a current setting value is achieved through the first distance and / or the second distance along with axial movement of the adjustment piece. Adjustment is accordingly not influenced by structures of the mechanisms and a shell any more, the adjustment stroke is large, and the delay-adjustable breaker is simple in structural design, convenient to manufacture and stable in working performance.

Description

technical field [0001] The invention relates to a plastic case circuit breaker, in particular to a circuit breaker with adjustable overload setting value delay. Background technique [0002] A circuit breaker with adjustable overload setting generally includes a housing, an overload setting system, and a tripping mechanism with a drawbar; both the overload setting system and the tripping mechanism with a drawbar are fixed on the housing. The overload setting value of the circuit breaker is determined by the distance between the adjusting screw on the overload setting system and the drawbar, and the distance between the trigger surface on the drawbar and the triggered part on the tripping mechanism. The distance is proportional to the setting value. related to. The adjustment accuracy and performance stability of the current circuit breaker with adjustable overload setting value are often not up to standard, and it is difficult to process, manufacture and adjust, and the pro...

AI Technical Summary

Problems solved by technology

However, because the circuit breaker still directly adjusts the axial movement of the drawbar through the adjustment device to achieve the adjustment purpose; therefore, the axial adjustment stroke caused by directly moving the drawbar is limited, basically only about 5mm, and the adjustment stroke is small, resulting in low adjustment accuracy. , and due to the limitation of the bracket for fixing the drawbar on the tripping mechanism, the electromagnetic release and the structure of the shell, the axial movement of the drawbar and the matching part of the shell cannot be equipped with an interphase insulation isolation device, which has certain potential safety hazards

In addition, in addition to the separation and closing of the drawing rod processing mold in the X-axis direction, core pulling needs to be set in the Y-axis and Z-axis directions. Too complicated molds are not conducive to processing, and the processing cost is high.

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