A miniature circuit breaker with an automatic opening/closing function, comprising a circuit breaker body and an automatic opening/closing driving mechanism; the body comprises circuit breakers, each comprising a plastic housing, an opening/closing handle and a manipulation mechanism; a spindle hole is at the rotation center of each handle; the driving mechanism comprises a case, a driving motor with a driving turbine, a linkage turbine, a linkage gear, an output spindle and a release linkage member; the driving motor drives the linkage turbine for reciprocating rotation via the driving turbine, and the linkage turbine drives the release linkage member for reciprocating rotation within a preset angle range via a cam linkage so that a lever of the release linkage member prods an opening release linkage rod to perform a rapid opening action; the linkage turbine drives the linkage gear and the output spindle to do synchronous rotation via driving teeth.

A spring-loaded drive for a high-voltage power switch contains at least one spring and at least one tensioning motor for the at least one spring. The spring-loaded drive contains at least one rectifier circuit, which is formed by a plurality of diodes where precisely one diode is connected in series to the tensioning motor.

A switch assembly has a switch; and a servo drive system for the switch. The servo drive system includes: a motor configured to drive the switch; a power section configured to supply power to the motor; and a control unit configured to control the power section depending on at least one desired value. The control unit is configured to identify the presence of at least one safety-relevant event and, in the case of the safety-relevant event, to transmit at least one control signal to the power section. The power section is configured to initiate or carry out at least one safety measure depending on the control signal.

A remote controlled miniature circuit breaker includes a helical gear that engages with mating teeth of a slider plate coupled to main contacts of the circuit breaker, the helical gear including a flat portion to allow the sliding plate to slide past the helical gear. A unidirectional motor responds to an external signal to drive the helical gear while engaging the mating teeth of the slider plate, thereby moving the slider plate to close the main contacts. The motor is configured to respond to an external signal to resume the unidirectional rotation of the helical gear to position the flat portion of the gear to allow the slider plate to slide past the helical gear and contact a kicker lever to thereby open the main contacts. A trip lever pivotally mounted separately from the kicker lever, pushes the kicker lever to open the main contacts in a trip operation.

A motor assembly for a switch drive of an electric switch. The motor assembly has a brushless three-phase motor and an electronic control device for controlling the three-phase motor. The control device has a rectifier unit for rectifying a supply voltage of the motor assembly if the supply voltage is an AC voltage, and for reverse polarity protection if the supply voltage is a DC voltage. The control device also has a voltage measuring unit for detecting a rectifier output voltage of the rectifier unit, a switch unit for generating a pulse width-modulated drive AC voltage for the three-phase motor from the rectifier output voltage, and a control unit for actuating the switch unit according to the rectifier output voltage.

A switching assembly is for an electrical switching apparatus of a switching system. The electrical switching apparatus includes a base. The switching system has a communication device. The switching assembly includes a number of contact assemblies coupled to the base, each of the contact assemblies having a stationary contact and a movable contact structured to move between a CLOSED position corresponding to engagement with the stationary contact, and an OPEN position corresponding to disengagement with the stationary contact; and a transfer assembly including an element and only one single actuator coupled to the element, the element being structured to be coupled to the base, the single actuator comprising a controller for receiving a signal from the communication device. The single actuator is structured to move the movable contact of each of the number of contact assemblies between the CLOSED position and the OPEN position.

A switch assembly including a switch and a drive system for the switch. The drive system includes a motor for driving the switch, a control device with a power section for supplying power to the motor, a controller for initiating a switching operation of the switch by control of the power section, and a protection circuit. The protection circuit is configured to detect a first error signal via a state contact of the controller in the event of a malfunction of the controller, detect a second error signal via a state contact of the power section in the event of a malfunction of the power section, and initiate a safety measure depending on the first and the second error signal. The control device is configured to activate the protection circuit prior to the switching operation being initiated and to deactivate it following successful execution of the switching operation.

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.

A switch unit for switching over an onload tap changer. The switch unit has an on-load tap changer with an actuating shaft that actuates a switch; and a drive system with a motor. The drive system is mechanically coupled to and configured to actuate the on-load tap changer. The drive system is configured such that, when the on-load tap changer is actuated, the drive system uses the actuating shaft as a store for kinetic energy in such a way that the actuating shaft is accelerated and the switch is actuated by the kinetic energy from the actuating shaft and additional energy provided by the motor.

A method for carrying out a switchover of a switch from a current switching position to a target switching position by means of a drive system. The method includes receiving, by the drive system, a switching signal from a control device, determining, via a feedback signal of a feedback system, at least one value for a first position of a drive shaft of the drive system, determining, by the control device, a value for a second position of the drive shaft on the basis of the target switching position, to be moved to, of the switch, and ascertaining, by the control device, a difference between the value for the first position and the value for the second position of the drive shaft. The control device, depending on the feedback signal, acts on a motor until the value for the second position of the drive shaft is reached.