Abstract: A hydromechanical stored-energy spring mechanism is provided for operating at least one switching contact of a circuit breaker, for example, in a high-voltage switching system. The hydromechanical stored-energy spring mechanism includes a hydraulically operated close-open (CO) delay circuit configured to delay triggering of a switching process of the circuit breaker, and an electromechanical actuator provided in place of a hydraulic operation of the CO delay circuit. The electromechanical actuator generates a mechanical time delay or acceleration over an extended temperature range.

Abstract: Exemplary embodiments are direct to a valve system for actuating the piston of a piston cylinder arrangement for a hydraulic or fluid device, and for actuating the piston cylinder arrangement for actuating the movable contact piece of a high-voltage circuit breaker. The system including a main control valve arrangement, having two 2/2-way valves used as main valves and which can be controlled by a pilot control valve arrangement. The main control valve arrangement directs a path for the high pressure fluid to the chamber above the piston and connects the chamber to a low-pressure tank for discharging the chamber above the piston. Two 2/2-way valves which form the pilot control valve arrangement are associated with the main control valve arrangement such that the 2/2-way valves direct or supply either a high-pressure control pressure or a low-pressure control pressure to the main control valve arrangement.

Abstract: Exemplary embodiments relate to a drive for a switch disconnector having C or O switching capacity and a switching pin acting as switching contact. A spindle drive is driven by an electric motor and has a spindle nut. An actuating element, which is loaded by a compression spring and is capable of pivoting about a fixed pivot point, is acted upon by the spindle nut. The actuating element for its part interacts with an actuating apparatus which actuates the switching pin.

Abstract: Exemplary embodiments relate to a valve arrangement for actuating a piston cylinder arrangement, that includes a pilot control valve arrangement and a main control valve arrangement, wherein both the pilot control and main control valve arrangement include a 3/2-way valve as a pilot control valve and as a main control valve. Each valve has a control-pressure, high-pressure, and low-pressure connection. Said connections are connected to each other such that the main control valve is controlled via the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection and on the high-pressure connection of both valves, are statically inverted relative to each other. The 3/2-way valves are designed as seat valves and are only hydraulically connected to each other.

Abstract: A valve system for activating a piston of a piston-cylinder arrangement for a hydraulic or fluid device includes a pilot control valve including 3/2-way valve and a main valve arrangement having a first and a second main valve. The first and second main valves include 2/2-way valves, wherein in a first position the pilot-control valve is configured to move the first main valve into an open position so as to direct a path for a high pressure fluid to a space above the piston, and wherein in a second position the pilot-control valve is configured to connect the space to a low-pressure tank so as to relieve a pressure in the space above the piston via the second main valve, and wherein the pilot-control valve is configured to open the second main valve and configured to close the first main valve.

Abstract: Exemplary embodiments are direct to a valve system for actuating the piston of a piston cylinder arrangement for a hydraulic or fluid device, and for actuating the piston cylinder arrangement for actuating the movable contact piece of a high-voltage circuit breaker. The system including a main control valve arrangement, having two 2/2-way valves used as main valves and which can be controlled by a pilot control valve arrangement. The main control valve arrangement directs a path for the high pressure fluid to the chamber above the piston and connects the chamber to a low-pressure tank for discharging the chamber above the piston. Two 2/2-way valves which form the pilot control valve arrangement are associated with the main control valve arrangement such that the 2/2-way valves direct or supply either a high-pressure control pressure or a low-pressure control pressure to the main control valve arrangement.

Abstract: Exemplary embodiments relate to a valve arrangement for actuating a piston cylinder arrangement, that includes a pilot control valve arrangement and a main control valve arrangement, wherein both the pilot control and main control valve arrangement include a 3/2-way valve as a pilot control valve and as a main control valve. Each valve has a control-pressure, high-pressure, and low-pressure connection. Said connections are connected to each other such that the main control valve is controlled via the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection and on the high-pressure connection of both valves, are statically inverted relative to each other. The 3/2-way valves are designed as seat valves and are only hydraulically connected to each other.

Abstract: A hydromechanical stored-energy spring mechanism is provided for operating at least one switching contact of a circuit breaker, for example, in a high-voltage switching system. The hydromechanical stored-energy spring mechanism includes a hydraulically operated close-open (CO) delay circuit configured to delay triggering of a switching process of the circuit breaker, and an electromechanical actuator provided in place of a hydraulic operation of the CO delay circuit. The electromechanical actuator generates a mechanical time delay or acceleration over an extended temperature range.

Abstract: The invention relates to a device for actuating an electrical switchgear comprising at least one mobile contact point driven by a rotary shaft. According to the invention, an electric motor comprising a rotating drive shaft can be coupled to the rotary shaft by means of a transmission, in order to drive the same.

Abstract: A valve system for activating a piston of a piston-cylinder arrangement for a hydraulic or fluid device includes a pilot control valve including 3/2-way valve and a main valve arrangement having a first and a second main valve. The first and second main valves include 2/2-way valves, wherein in a first position the pilot-control valve is configured to move the first main valve into an open position so as to direct a path for a high pressure fluid to a space above the piston, and wherein in a second position the pilot-control valve is configured to connect the space to a low-pressure tank so as to relieve a pressure in the space above the piston via the second main valve, and wherein the pilot-control valve is configured to open the second main valve and configured to close the first main valve.

Abstract: The invention relates to a device for actuating an electrical switchgear comprising at least one mobile contact point driven by a rotary shaft. According to the invention, an electric motor comprising a rotating drive shaft can be coupled to the rotary shaft by means of a transmission, in order to drive the same.