Various embodiments of the teachings herein include a grid influencing system for a power supply grid comprising: a current-conducting grid influencing component; and a vacuum circuit breaker including a vacuum circuit breaker tube containing an at least partly integrated pre-arcing device for actively generating an arc between two contacts.

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.

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.

An insulator that has particular application for enclosing a switching device, such as a vacuum interrupter. The insulator includes a body having a top portion and a bottom portion, and a plurality of ring-shaped sheds extending from the body between the top portion and the bottom portion. The sheds are asymmetrical in an axial direction such that an axial dimension of the sheds at one side towards the front of the switching device is shorter than an axial dimension of the sheds at an opposite side towards the rear of the switching device. The axial dimension of the sheds uniformly increases from the one side to the opposite side.

An insulator that has particular application for enclosing a switching device, such as a vacuum interrupter. The insulator includes a body having a top portion and a bottom portion, and a plurality of ring-shaped sheds extending from the body between the top portion and the bottom portion. The sheds are asymmetrical in an axial direction such that an axial dimension of the sheds at one side towards the front of the switching device is shorter than an axial dimension of the sheds at an opposite side towards the rear of the switching device. The axial dimension of the sheds uniformly increases from the one side to the opposite side.

A vacuum interrupter. The vacuum interrupter comprising at least one anode side contact blade, at least one cathode side contact blade, at least one anode side conducting rod, at least one a cathode side conducting rod, a shielding case and an outer magnet, wherein the shielding case covers the at least one anode side contact blade, the c at least one anode side contact blade, the at least one anode side conducting rod and at least one cathode side conducting rod; and the outer magnet covers the shielding case. According to the vacuum interrupter, the outer magnet is arranged to generate a fixed first longitudinal magnetic field in the interelectrode area of the at least one anode side contact blade and the at least one cathode side contact blade, contraction of arcs during current breaking can be alleviated, the arcs are in a diffusion state, and ablation of the contact in the arcing process is reduced, and breaking capacity of a vacuum circuit breaker is guaranteed.

A vacuum interrupter. The vacuum interrupter comprising at least one anode side contact blade, at least one cathode side contact blade, at least one anode side conducting rod, at least one a cathode side conducting rod, a shielding case and an outer magnet, wherein the shielding case covers the at least one anode side contact blade, the c at least one anode side contact blade, the at least one anode side conducting rod and at least one cathode side conducting rod; and the outer magnet covers the shielding case. According to the vacuum interrupter, the outer magnet is arranged to generate a fixed first longitudinal magnetic field in the interelectrode area of the at least one anode side contact blade and the at least one cathode side contact blade, contraction of arcs during current breaking can be alleviated, the arcs are in a diffusion state, and ablation of the contact in the arcing process is reduced, and breaking capacity of a vacuum circuit breaker is guaranteed.

A medium voltage load break switch includes a main contact and a knife. The knife is rotatable about a pivot point to connect to and be in contact with the main contact and to rotate about the pivot point to disconnect from and be spaced from the main contact. The load break switch also comprises a vacuum interrupter that has a fixed contact and a moveable contact. A lever rotates about a rotation point and a shaft of the moveable contact is aligned along an axis of the vacuum interrupter, and the shaft of the moveable contact is linked to the lever.

A medium voltage load break switch includes a main contact and a knife. The knife is rotatable about a pivot point to connect to and be in contact with the main contact and to rotate about the pivot point to disconnect from and be spaced from the main contact. The load break switch also comprises a vacuum interrupter that has a fixed contact and a moveable contact. A lever rotates about a rotation point and a shaft of the moveable contact is aligned along an axis of the vacuum interrupter, and the shaft of the moveable contact is linked to the lever.

A method for producing an electrical switch contact arrangement for a vacuum circuit breaker includes the following steps: a) providing two electrical contact pieces made of copper or a copper alloy; b) coating the electrical contact pieces with aluminum or an aluminum alloy, the coating of the contact pieces taking place by means of a cold gas spraying method; c) welding each of the sides coated in method step b) to a current transfer contact; and d) arranging the units obtained in method step b) inside the vacuum circuit breaker. There is also described an electrical switch contact arrangement for a vacuum circuit breaker with the contact pieces produced by the method according to the invention.