Abstract: A locking apparatus for a manual actuation device of a switchboard plant has a trigger mechanism that is activated by an absence of a backup or a defective backup, and a locking mechanism for the manual actuation device. The locking mechanism is coupled to the trigger mechanism and is transferable by the trigger mechanism from a first position releasing the manual actuation device into a second position locking the manual actuation device. The locking apparatus has a simple and cost-effective construction, it is proposed that the locking mechanism has a cover plate which is displaceable between two positions by the trigger mechanism and which, in its first position, blocks a lever configuration under tensile force, of the locking mechanism and, in its second position, releases the lever configuration in order to lock the manual actuation device.

Abstract: A coupling electrode for capacitive voltage tapping within an insulating body of a component which has at least one conductor section which is embedded in the insulating body and to which a high-voltage potential can be applied, having an electrode section which is composed of a semiconductive plastic, and having a connecting element which is electrically connected to the electrode section and is designed such that it can be passed out of the insulating body. A holder which is composed of a non-conductive material and, is connected to the electrode section and has the positioning means, which allow isolated mounting of the electrode section.

Abstract: A gas tank for receiving a protective gas in electrical switchgear of a power supply has a non-transparent housing section and a viewing window which occludes a passage in the non-transparent housing section in a gas-tight manner. The object is to provide an inexpensive gas tank that reliably seals even at higher temperatures. For this purpose, the viewing window is formed onto the non-transparent housing section.

Abstract: A locking apparatus for a manual actuation device of a switchboard plant has a trigger mechanism that is activated by an absence of a backup or a defective backup, and a locking mechanism for the manual actuation device. The locking mechanism is coupled to the trigger mechanism and is transferable by the trigger mechanism from a first position releasing the manual actuation device into a second position locking the manual actuation device. The locking apparatus has a simple and cost-effective construction, it is proposed that the locking mechanism has a cover plate which is displaceable between two positions by the trigger mechanism and which, in its first position, blocks a lever configuration under tensile force, of the locking mechanism and, in its second position, releases the lever configuration in order to lock the manual actuation device.