Abstract: A combined disconnecting and grounding switch for high voltage use. A space-saving arrangement providing for automatic grounding when the switch is in an open circuit position. The disconnecting and grounding switch including a connection contact connectable with a contact having a high voltage potential wherein the contacts are vertically arranged one over the other. The switch also includes a switch rod designed to be vertically displaceable in its longitudinal direction. The switch rod has an upper conductive section and an adjoining lower non-conductive section. The switch rod can be moved up or down by a driving arrangement including a threaded shaft driven by a motor and a traveling nut assembly cooperating with the threaded shaft.

Abstract: In a metal-clad, compressed gas-insulated high-voltage switching installation, installation parts can be cut off by a circuitbreaker and connected to the grounded casing by means of a grounding switch, insulated measuring electrodes connectable to the testing terminal of a capacitive voltage divider and to a display device being provided in the casing adjacent to the grounding switch, for observation of the conductor voltage.To obtain a simple test setup in a three-phase clad installation, two pin-type measuring electrodes are arranged respectively centrally between pairs of the three conductors in such a way that their rounded end protrudes into the interior of the casing.