Electronic auxiliary contact for a contactor
AssigneeABB Stromberg Kojeet Oy
InventorsEsko Kiiskinen, Petri Solanti, Erkki Rajala
Life of this patent
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Abstract
An electronic auxiliary contact for a contactor has at least one switch element controllable to the conducting and non-conducting states for the purpose of indicating the position of the contact bridging member in the contactor, and a switch-activating element mechanically connected to the contact bridging member and capable of activating the switch element. The switch-activating element incorporates at least one activating element, and the switch-activating element makes no mechanical contact with the switch element. The system provides a reliable method of monitoring the operation of a contactor.
Claims4
An electronic auxiliary contact for a contactor, said auxiliary contact comprising:
- movable slider mechanically connected to a contact bridging member for following change of position of the contact bridging member;
- at least one switch element cooperating with the slider for moving between conducting and non-conducting positions for indicating the position of the contact bridging member in said contactor;
- and
- at least one activating element for activating said switch element, the at least one activating element being incorporated in the slider;
- said slider failing to make mechanical contact with said at least one switch element.
The auxiliary contact as defined in any of the foregoing claims, wherein the switch outputs a signal triggered by said activating elements, said auxiliary contact incorporates a signal-processing unit for elimination of interference and processing of information related to the position of said contact bridging member of said contactor.
Dependencies are inferred from the claim text.