Abstract: An insulating switching rod has a drive element for initiating a drive movement in an electrical contact system of a switching device and for producing a contact force when the contact system is in the closed state. The system further includes a clamping apparatus for the drive element of the switching rod in order to maintain the contact force. The object is to produce a greater contact force with a compact design and ensure constant spring characteristics as well as low wear over the entire useful life. For that purpose, the switching rod and the drive element can be directly or indirectly connected to one another by way of a plug and latching connection.

Abstract: A Rogowski sensor is provided for measuring a current of an electrical conductor. The sensor has a Rogowski coil, which has an electrical winding resistor, and an integration device which is connected to the Rogowski coil and is intended to generate an output signal which is proportional to the electrical current to be measured by the Rogowski sensor. The integration device is formed by the winding resistor of the Rogowski coil and a capacitance which is connected to the two winding connections of the Rogowski coil, and for the output signal from the integration device to be formed by the voltage applied to the capacitance.

Abstract: An insulating switching rod has a drive element for initiating a drive movement in an electrical contact system of a switching device and for producing a contact force when the contact system is in the closed state. The system further includes a clamping apparatus for the drive element of the switching rod in order to maintain the contact force. The object is to produce a greater contact force with a compact design and ensure constant spring characteristics as well as low wear over the entire useful life. For that purpose, the switching rod and the drive element can be directly or indirectly connected to one another by way of a plug and latching connection.

Abstract: A magnetic drive system for switchgear has a magnet yoke in which a solid armature made of a magnetic material is guided in a linearly displaceable manner between two opposing end positions. The magnetic drive system further has at least one permanent magnet for generating a magnetic flux in the magnet yoke and at least one coil by which the armature can be moved back and forth between the end positions thereof. The armature is provided with elongated hollow channels for preventing eddy current losses. So as not to excessively reduce the stability of the armature by the channels made therein, the channels in the armature are configured in a closed fashion on the circumference thereof.

Abstract: A switching pole for a high-voltage network has a switching unit disposed in a switching pole housing. The switching unit includes a fixed contact and a movable contact. An input connector on a fixed contact side is connected to an output connector on the movable contact side in an electrically conductive manner in the switched-on position of the switching unit. In order to be able to simultaneously connect a current sensor and a voltage sensor to one of the connectors while maintaining breakdown safety, an arrangement of the current and voltage sensors is provided at a circumferential distance from each other on the circumferential wall of the switching pole housing, which prevents partial discharges.

Abstract: An insulating switching rod is used to initiate a drive movement into a moving contact of an electrical contact system of a switching device and to produce a contact force when the contact system is in the closed state. A tensioning apparatus is arranged in a cavity for a drive element of the switching rod in order to maintain the contact force, which has a greater contact force with a compact design, and ensures constant spring characteristics as well as low wear over the entire useful life. The tensioning apparatus is formed by a helical compression spring configuration or by two oppositely wound helical springs.

Abstract: A Rogowski sensor is provided for measuring a current of an electrical conductor. The sensor has a Rogowski coil, which has an electrical winding resistor, and an integration device which is connected to the Rogowski coil and is intended to generate an output signal which is proportional to the electrical current to be measured by the Rogowski sensor. The integration device is formed by the winding resistor of the Rogowski coil and a capacitance which is connected to the two winding connections of the Rogowski coil, and for the output signal from the integration device to be formed by the voltage applied to the capacitance.

Abstract: An electrical current limiting device has a superconductive switching element. Unlike prior art superconductive current limiters whose switching mechanism is based on a quenching of the switching element, the inventive superconductive switching element is designed in such a manner that it is in the Shubnikov phase when the required short-circuit cutoff current is reached in the event current is limited. This enables the switching element to be operated in an operating state in which the generation of heat is limited to such an extent that the coolant surrounding the superconductor is able to completely dissipate the heat whereby achieving a stationary state at TS. A quenching of the superconductor, which is associated with an exceeding of TC, can thus be actively prevented so that, after an event in which current is limited, the superconductor is not required to be removed from the mains and recooled.

Abstract: A circuit-breaker pole insulated by solid material, with an electrically non-conductive and dimensionally stable insulating material housing. An interrupter is disposed in the housing. The interrupter has a fixed contact and a moving contact, which is located opposite the fixed contact on a drive side and is guided in a longitudinally movable manner. The insulating material housing is open on the drive side in order to allow the introduction of a drive movement into the moving contact. An elastic padding is arranged between the interrupter and the insulating material housing. The elastic padding has such self-adhesive properties that an adhesive bond that can only be abrasively released is obtained both with the interrupter and with the insulating material housing.

Abstract: An insulating material housing has a holding section, which is designed for holding a switching tube and which is fitted with an input connecting piece, and a drive section, which connects to the holding section in a longitudinal direction, has a drive opening for introducing a drive movement into the switching tube, and which is fitted with an output connecting piece. A ventilation shaft is provided that communicates with an inner space of the drive section. The object is to provide an insulating material housing of this general type with which, even in the event of large currents, a sufficiently high cooling capacity is provided. To this end, the ventilation shaft surrounds the holding section in the shape of a collar.

Abstract: A circuit breaker pole for interrupting the electric current is insulated by a solid material and has a dimensionally stable and electrically non-conducting insulating material housing, a switching tube fastened in the insulating material housing and having a stationary fixed contact and a movable mobile contact. An input connection piece is electrically connected to the fixed contact and contactable from outside, and an output connection piece is connected to the mobile contact via a movable contact connection. The output connection piece is linked with the insulating material housing in a fixed manner and has a contact surface that can be contacted from outside. The insulating material housing has an opening for inducing a driving motion into the movable contact. The mobile contact connection is fixed to the output connection piece by connecting devices that act upon the contact surface. The circuit breaker pole is inexpensive and easy to install.

Abstract: A coupling device for electrically connecting a first conductor to a second conductor has a first connecting piece to connect the first conductor and a second connecting piece to connect the second conductor. The first connecting piece is joined to the second connecting piece via flexible connecting means or sliding or rolling connecting means such that a relative movement can be performed between the first conductor and the second conductor. In order to create a coupling device that features improved constant current stability while heating remains at the same level, a cooling unit is provided for cooling the coupling device.

Abstract: An electrical current limiting device has a superconductive switching element. Unlike prior art superconductive current limiters whose switching mechanism is based on a quenching of the switching element, the inventive superconductive switching element is designed in such a manner that it is in the Shubnikov phase when the required short-circuit cutoff current is reached in the event current is limited. This enables the switching element to be operated in an operating state in which the generation of heat is limited to such an extent that the coolant surrounding the superconductor is able to completely dissipate the heat whereby achieving a stationary state at TS. A quenching of the superconductor, which is associated with an exceeding of TC, can thus be actively prevented so that, after an event in which current is limited, the superconductor is not required to be removed from the mains and recooled.

Abstract: The invention relates to a method for producing a circuit-breaker pole (1), insulated by a solid material, said pole comprising an actuator opening that is configured to introduce an actuation displacement. According to said method: a switch (2) comprising a switch housing (3), which has an actuation face (8), through which a drive rod (9) is guided and a dimensionally stable jacket (7) consisting of insulation material and provided with a connection part (6) are produced independently of one another; the switch (2) is fixed in the jacket (7) in such a way that the switch housing (3) excluding the actuation face (8) and the jacket (7) that is provided with the connecting part (6) delimit a gap which opens towards the actuation opening; the gap is subsequently filled with a fluidic compensating mass (10) and finally said mass (10) is cured. The invention also relates to a circuit-breaker pole (1) comprising a potting channel, for interrupting an electric current.

Abstract: A drive unit is described for switching circuit breakers on and off, in particular disconnecting switches and/or grounding switches of medium-voltage switchgear. The drive unit includes a reversible d.c. motor and a switching device containing two separately drivable and interlocked reversing switches, one assigned to each direction of rotation of the d.c. motor, their contacts performing the current reversal on the windings of the d.c. motor as required to reverse the direction of rotation. The drive unit further includes power contactors whose contacts have the required switching capacity for load switching. The all-or-nothing relays and safety switches are implemented by uniform low-power relays representing the direction of rotation, each having at least two electrically isolated relay contacts connected in parallel and also having an equalizing capacitor connected in parallel to each. Such drive units are used in connection with switchgear for power transmission and distribution.

Abstract: To improve the mechanical properties of a contact unit of a vacuum relay, a spring element is integrated into the contact unit. The contact unit comprises an armature, a mounting support for an insulating carrier, the insulating carrier and a switching contact. The mounting support comprises a flat bar spring such that the contact unit has an integrated spring element.

Abstract: To improve the high voltage strength of conductor bushings on an insulating housing structure, the outer surface of the housing structure is depressed all around the bushing aperture and is provided with a metallization within this depressed region. The conductor which is passed through is preferably fixed into position with a holding element, which consists of a tapered tubular piece having an annular base resting on the depressed surface and a collar-type neckpiece contacting the lead contact wire.