Patent ID: 9218923
Filing Date: 2015-12-22
Classification: H01H

Abstract:
1. A switching apparatus for closing an electric circuit of medium or high voltage level, the apparatus including a movable contact arranged linearly movable between a first and a second position, wherein the apparatus comprises a device for indicating the state of the switching apparatus, the device comprising: at least one protruding contact element arranged on the movable contact; a contact pin arranged at a distance from the movable contact, such that said contact element abuts the contact pin when the movable contact is in the first position and said contact element is at a distance from the contact pin when the movable contact is in the second position, whereby the contact element and the contact pin form an electrical switch; and a detector arrangement configured to detect when said electrical switch is closed and by that detect when the movable contact is in the first position, the detector arrangement comprises a power supply arranged to form a second electric circuit together with said electrical switch and a measuring unit arranged to measure the voltage or current in the second electric circuit, and the detector arrangement is configured to detect when the movable contact is in the first position based on the level of the measured voltage or current.