A vacuum circuit breaker includes a vacuum circuit breaker tube having a vacuum housing in which a contact system is disposed. The contact system includes two contacts which are movable relative to one another. An electrical pre-arcing unit having an ignition electrode in the vacuum housing is provided for igniting an arc along an arc current path.

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.

A vacuum circuit breaker includes a vacuum circuit breaker tube having a vacuum housing in which a contact system is disposed. The contact system includes two contacts which are movable relative to one another. An electrical pre-arcing unit having an ignition electrode in the vacuum housing is provided for igniting an arc along an arc current path.

An apparatus for setting a gap between a first electrode and a second electrode of a spark plug, encompassing at least a counter-brace, a gap plate, and a plunger, which are disposed along a longitudinal axis; the counter-brace being configured to brace the spark plug; the gap plate being disposed between the counter-brace and the plunger in the direction of the longitudinal axis; the gap plate being configured to be disposed between the first electrode and the second electrode; and the plunger being configured to apply a deformation force in the direction of the longitudinal axis onto the second electrode.

An apparatus for setting a gap between a first electrode and a second electrode of a spark plug, encompassing at least a counter-brace, a gap plate, and a plunger, which are disposed along a longitudinal axis; the counter-brace being configured to brace the spark plug; the gap plate being disposed between the counter-brace and the plunger in the direction of the longitudinal axis; the gap plate being configured to be disposed between the first electrode and the second electrode; and the plunger being configured to apply a deformation force in the direction of the longitudinal axis onto the second electrode.

A surge protection component with a main body which has at least one inner electrode arranged between two ceramic layers, wherein the at least one inner electrode is set back from at least one lateral face of the main body, wherein a gas-filled cavity is provided between the at least one inner electrode and the at least one lateral face, and wherein an outer electrode is respectively arranged on two mutually opposite lateral faces of the main body. According to a further aspect, the present invention relates to a method for producing a surge protection component.

A surge protection component with a main body which has at least one inner electrode arranged between two ceramic layers, wherein the at least one inner electrode is set back from at least one lateral face of the main body, wherein a gas-filled cavity is provided between the at least one inner electrode and the at least one lateral face, and wherein an outer electrode is respectively arranged on two mutually opposite lateral faces of the main body. According to a further aspect, the present invention relates to a method for producing a surge protection component.

A spark plug including a ground electrode including a base material, a tip having a discharge surface, and a melt portion interposed over an entire area between the tip and the base material and joining the tip to the base material; and a center electrode with a spark gap formed between the center electrode and the discharge surface. The tip has, in an inner area surrounded by an outer peripheral portion of the tip, a thin portion in which a distance between the discharge surface and the melt portion is shorter than a distance between the discharge surface and the melt portion in the outer peripheral portion. The thin portion extends from a part of the outer peripheral portion to a part other than the part of the outer peripheral portion.

A spark plug including a ground electrode including a base material, a tip having a discharge surface, and a melt portion interposed over an entire area between the tip and the base material and joining the tip to the base material; and a center electrode with a spark gap formed between the center electrode and the discharge surface. The tip has, in an inner area surrounded by an outer peripheral portion of the tip, a thin portion in which a distance between the discharge surface and the melt portion is shorter than a distance between the discharge surface and the melt portion in the outer peripheral portion. The thin portion extends from a part of the outer peripheral portion to a part other than the part of the outer peripheral portion.

A spark plug including a ground electrode including a base material, a tip having a discharge surface, and a melt portion interposed over an entire area between the tip and the base material and joining the tip to the base material; and a center electrode with a spark gap formed between the center electrode and the discharge surface. The tip has, in an inner area surrounded by an outer peripheral portion of the tip, a thin portion in which a distance between the discharge surface and the melt portion is shorter than a distance between the discharge surface and the melt portion in the outer peripheral portion. The thin portion extends from a part of the outer peripheral portion to a part other than the part of the outer peripheral portion.