A motor drive for actuation of an on- or off-load tap changer the drive has a drive motor, a load transmission having a first drive shaft carrying a first drive wheel and connected with the drive motor and a second drive shaft carrying a second drive wheel, and a mechanical coupling between the first and second drive wheels. The second drive shaft is operatively connected at a first end with the on- or off-load tap changer and at a second end with an indicator transmission. A setting indicator operatively connected with the indicator transmission displays the current setting of the on- or off-load tap changer, and a disengageable coupling is provided between the setting indicator and the load transmission.

A multi-pole switch assembly includes a housing, a plurality of switches, and an actuator. The switches are disposed within the housing, and each switch is coupled to receive an actuation force and is configured, upon receipt of the actuation force, to move between a first position and a second position. The actuator is disposed at least partially within the housing and is configured to at least substantially simultaneously engage, and thereby supply the actuation force to, each switch to thereby move all of the switches, with substantial simultaneity, to either the first or the second position. The actuator is rotatable to a plurality of set rotational positions to thereby vary the substantial simultaneity.

An apparatus (200) for remote manipulation of an electric equipment. The apparatus (200) comprises a supporting structure (204) adapted to be attached to the electric equipment adjacent to a button (202a) of the electric equipment, and an elongated lever (206) attached to an axis (204a) of the supporting structure between a first end and a second end of the elongated lever such that the elongated lever is rotatable around the axis (204a). The apparatus (200) also comprises an actuation member (208, 210) adapted to actuate the first end of the elongated lever in response to an actuation signal (S) such that the elongated lever rotates around the axis (204a) so to move a finger portion (206c) at the second end of the lever against the button with a predefined maximum length. Thereby, a precise and well-defined movement of the finger portion (206c) can fairly easy be created with a predefined maximum length which is sufficient to press the button (202a) to activate some function as desired, but without risking damage of the button (202a).

This application discloses a motor drive of electrical apparatuses which drives medium and high voltage switch disconnectors, circuit breakers, disconnectors, and earthing switches. The disclosed drive includes a system of reduction transmissions including a worm transmission and a cycloidal transmission located in a common housing. The axis of the output shaft of the drive is situated centrically on the axis of a wormwheel of the worm transmission, in the axis of the output gear of the cycloidal transmission and in the axis of a revolving eccentric bush. The wormwheel of the worm transmission is mounted immovably on the revolving eccentric bush on which there is mounted rotatably a gear wheel of the cycloidal transmission whose output gear is coupled with a slidable bush of a disengaging coupling mounted on the free end of the output shaft of the drive.

The invention relates to a drive device for an electrical switching device, in particular for a high-voltage switch, having a housing which can be filled with insulating gas, having an energy storage device which is arranged in the housing and has a spring and a stop against which the spring can be tensioned. According to the invention, an adjustment device which can be actuated from the exterior of the housing is provided, by means of which adjustment device a position of the stop in the housing can be adjusted along an axis.

A system for adjusting a length of an insulating rod of a high voltage circuit breaker includes a clutch and a fitting. The clutch includes a thread with a given thread pitch, and the fitting includes a thread with a given thread pitch formed in coordination with the thread of the clutch. The fitting is adjustably coupled with the clutch by means of the threads and the fitting is configured to be fixedly coupled with the insulating rod such that with respect to an assembled state of the system with insulating rod and with respect to a longitudinal axis the length of the insulating rod is adjustable due to rotation of the clutch relative to the fitting.

According to various embodiments, an input device may be provided. The input device may include: a housing having an upper portion and a lower portion; a key top provided at the upper portion; a switch coupled to the key top; a biasing element having a first end and a second end, wherein the first end is coupled to the key top, and wherein the second end is coupled to the lower portion; and an adjustment mechanism configured to adjust a pretension of the biasing element.

A control device with limit switches is provided. The device has a container housing an electric circuit provided with one or more limit switches, and a driving assembly configured to control operation of a valve or an actuator through the limit switches of the electric circuit. The driving assembly has a shaft configured to be rotatably coupled to a valve or an actuator and one or more cams keyed on the shaft and is configured for driving the limit switches of the electric circuit. The shaft has a gripping surface and each cam has a radial clamping mechanism whose gripping members are arranged in correspondence of a through hole configured to allow to fit the cam onto the shaft.

A modular auxiliary switch includes a housing including a first housing part and a separate second housing part secured to the first housing part. A printed circuit board is housed in one of the first and second housing parts, and has a first side facing the first housing part and a second opposite side facing the second housing part. An actuator mechanism is housed in the first housing part and is coupled to the printed circuit board. A separate first electrical contactor is selectively mounted to the printed circuit board so that a first electrical contact surface of the first electrical contactor overlaps and is in direct contact with one of the first side and the second side to define a first electrical contact pad on the printed circuit board.

Provided are an emergency stop apparatus including a switch unit installed in a work space, electrically connected to a facility, and operable by pulling and a wire which is disposed in the work space so that tension is applied and of which at least one side is detachably mounted on the switch unit and an emergency stop method for quickly stopping the facility at a desired position within the work space in a manner of pulling or pushing the wire.