An operating mechanism for tripping a circuit-breaker, the operating mechanism comprising a coil having a first terminal and a second terminal, means for generating a first electric impulse, and means for creating, from the first electric impulse, a second electric impulse delayed from the first electric impulse and applied between the first terminal and the second terminal of the coil, characterized in that the means for creating the second electric impulse comprise a delaying circuit and a switch connected in series with the coil, the delaying circuit having an input connected to an output of the means for generating a first electric impulse and an output which delivers the second electric impulse, said second electric impulse being a command signal of the switch.

An operating mechanism for operating at least one contact is provided. The operating mechanism includes a base frame and an operating rod that is linearly guided in the base frame for connection with at least one contact. The operating mechanism further includes a contact spring for urging the operating rod to the open position and a rod mechanism having two links, and each link has a first end and a second end. The operating mechanism also includes a cam follower arranged at the middle hinge of the rod mechanism, a cam arranged on a cam shaft, a cam shaft lock for lacking the shaft, and a closing spring. The opening section of the cam is configured such that the cam follower follows the profile of the opening section when the operating rod moves from the closed position towards the open position.

A crank arm of an auxiliary rotary switch in a circuit breaker changes electrical connections of contacts in the auxiliary rotary switch when the crank-arm is rotated about its axis. An auxiliary switch actuator decouples abrupt forces from being applied to the crank arm resulting from closing main contacts of the circuit breaker. In response to the main contacts starting to close, the crank arm is set into rotation by motion of a connection-state link that is coupled to the main contacts. The rotation of the crank arm continues up to a point at which the rotation is stopped, while the connection-state link continues its motion without being connected to the crank arm. In this manner, the connection-state link is decoupled from the crank arm, to relieve the crank arm from receiving the abrupt forces conducted by the connection-state link resulting from the main circuit breaker contacts closing.

A crank arm of an auxiliary rotary switch in a circuit breaker changes electrical connections of contacts in the auxiliary rotary switch when the crank-arm is rotated about its axis. An auxiliary switch actuator decouples abrupt forces from being applied to the crank arm resulting from closing main contacts of the circuit breaker. In response to the main contacts starting to close, the crank arm is set into rotation by motion of a connection-state link that is coupled to the main contacts. The rotation of the crank arm continues up to a point at which the rotation is stopped, while the connection-state link continues its motion without being connected to the crank arm. In this manner, the connection-state link is decoupled from the crank arm, to relieve the crank arm from receiving the abrupt forces conducted by the connection-state link resulting from the main circuit breaker contacts closing.

A drive arrangement for a tap changer includes a first movable latch having a first and a second end a first rotatable wheel with a first actuating element, a second rotatable wheel with a first locking element, and a first spring connected between the first and second wheels. The first actuating element is provided on a first half of a first curved surface of the first wheel, the first locking element is provided on a first half of a second curved surface of the second wheel, a second actuating element is provided on a second half of the first curved surface aligned with a first end of a second latch and a second locking element of the second rotating wheel is provided on a second half of the second curved surface aligned with a second end of the second latch.

Implementations of the subject matter described herein provide a switching apparatus including an energy storage changement mechanism that can realize the main shaft energy storage and direction changement by using only one solenoid. Furthermore, the switching apparatus can be adopted in both two position ATS and three position ATS to satisfy different application scenarios or different market requirements. In addition, all transfers can be achieved by independent manual and electric operation, and each transfer action only requires powering a single solenoid.

Implementations of the subject matter described herein provide a switching apparatus including an energy storage changement mechanism that can realize the main shaft energy storage and direction changement by using only one solenoid. Furthermore, the switching apparatus can be adopted in both two position ATS and three position ATS to satisfy different application scenarios or different market requirements. In addition, all transfers can be achieved by independent manual and electric operation, and each transfer action only requires powering a single solenoid.

A switch system includes a mechanical switch for switching electrical currents, the mechanical switch operating in one of a closed state and an open state; the system further including an actuator configured to change the state of the mechanical switch, wherein the actuator comprises a Thomson-coil system including a Thomson coil, and wherein the mechanical switch and the Thomson coil are electrically connected in series.

A locking system for an enclosure, including a control bracket mounted to a door of the enclosure and configured to slide in a longitudinal direction along a guide rod running through a pin bracket of the control bracket. The control bracket further includes a latching pin to secure the door of the enclosure. A handle mechanism has a push rod that causes the control bracket to slide along the longitudinal direction, also causing the latching pin to move into a position that secures the door.

A switch system includes a mechanical switch for electrical currents. The mechanical switch operates in a conductive state and in a non-conductive state. A first actuator is configured to change the state of the mechanical switch, wherein an actuation of the first actuator is based on a Thomson coil system. A second actuator is also configured to change the state of the mechanical switch and includes a loaded spring system locked by a latch system. Each of the first and second actuators is configured to change the state of the mechanical switch depending on a property of an electrical current passing through the mechanical switch.