Disc cam gearing for compensating for the compression force in vacuum interrupters

EP4762583A1Pending Publication Date: 2026-06-24SIEMENS ENERGY GLOBAL GMBH & CO KG
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
SIEMENS ENERGY GLOBAL GMBH & CO KG
Filing Date
2023-09-25
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Current circuit breakers with vacuum switching tubes face challenges in compensating for pressure forces acting on kinematic chains, leading to additional loads and non-linear stress on components, which complicates the switching mechanism and requires increased spring energies.

Method used

The introduction of a boundary element that decouples the movable contact element from the actuator via a torque coupling mechanism, allowing for almost complete compensation of pressure forces and enabling non-linear load compensation without additional components or complexity.

Benefits of technology

This solution effectively reduces the load on the actuator and kinematic chain, allowing for efficient switching without the need for increased spring energies, while also providing non-linear compensation to handle various load conditions.

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Abstract

The present invention relates to circuit breakers for selectively providing an electrically conductive connection, in particular circuit breakers having vacuum interrupters, wherein preferably non-linear load profiles at components of a kinematic chain are prevented. A circuit breaker (10) for selectively providing an electrically conductive connection is accordingly proposed, comprising at least one interrupter unit (12) which comprises an enclosure (14) with a movable contact element (16) arranged therein, wherein each movable contact element (16) is prestressed by a prestress element which is arranged on an end region of the enclosure (14) which is opposite the contact surface of the contact element, a switch housing (21), wherein the at least one interrupter unit (12) is housed in the switch housing (21) and each prestress element is subject to the pressure in the switch housing (21), and an actuator which is arranged outside of the switch housing (21) and is set up to selectively activate the respective movable contact element (16). According to the invention, the circuit breaker (10) further comprises a limiting element, preferably outside of the switch housing (21), which is set up to limit a movement of the respective movable contact element (16), wherein the respective movable contact element (16) and the actuator are coupled in terms of force and / or coupled in terms of torque via the limiting element.
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