A contact arrangement for a Pre-Insertion Resistor (PIR) wherein a control rod is arranged to move a movable contact, against the force of a biasing member, into temporary connection with a PIR. The control rod comprises a tulip with a plurality of resilient fingers and having a first diameter where it is able to mechanically couple to a latching ring on the movable contact, and a second diameter where the tulip is deformed with the fingers deflected inwards, once the resistance to movement exceeds a predetermined value, wherein the latching ring is able to pass over the tulip to decouple the movable contact from the control rod. The contact arrangement is particularly suited for a PIR arranged for connection in parallel to the interrupter of a gas-insulated switchgear (GIS) circuit breaker.

A switch gear system is described. In some implementations, a switch gear arrestor system can include a switch gear and one or more arrestors mounted on a non-conductive insulated bar. The one or more arrestors can be connected to one or more isolators through a respective aperture in the non-conductive insulated bar. Each arrestor can be connected to one of the one or more electrical energy sources at a first end and can be connected to one of the one or more isolators at a second end. The switch gear arrestor system can further include one or more ground leads. Each ground lead can connect one of the one or more isolators to a conductive grounding bar.

An interrupter unit for a circuit breaker includes a gas-insulated housing, which is fillable with a quenching gas, and a gas-guiding structure, which is disposed in the housing and has a guide tube and at least one diverting element. The guide tube extends in tubular manner about a longitudinal axis of the interrupter unit in order to guide hot gas, which is created in an electric arc region of the interrupter unit by the heating of quenching gas by an electric arc, away from the electric arc region. The at least one diverting element is configured to set hot gas exiting from the guide tube in a circular flow running around the longitudinal axis.

An interrupter unit for a circuit breaker includes a gas-insulated housing, which is fillable with a quenching gas, and a gas-guiding structure, which is disposed in the housing and has a guide tube and at least one diverting element. The guide tube extends in tubular manner about a longitudinal axis of the interrupter unit in order to guide hot gas, which is created in an electric arc region of the interrupter unit by the heating of quenching gas by an electric arc, away from the electric arc region. The at least one diverting element is configured to set hot gas exiting from the guide tube in a circular flow running around the longitudinal axis.

The invention concerns a contact arrangement (50) for a Pre-Insertion Resistor (PIR) wherein a control rod (20) is arranged to move a movable contact (30), against the force of a biasing member (18), into temporary connection with a PIR. The control rod (20) comprises a tulip (21) with a plurality of resilient fingers (24) and having a first diameter where it is able to mechanically couple to a latching ring (31) on the movable contact (30), and a second diameter where the tulip (21) is deformed with the fingers (24) deflected inwards, once the resistance to movement exceeds a predetermined value, wherein the latching ring (31) is able to pass over the tulip (21) to decouple the movable contact (30) from the control rod (20). The contact arrangement (50) is particularly suited for a PIR arranged for connection in parallel to the interrupter of a gas-insulated switchgear (GIS) circuit breaker.

The invention concerns a contact arrangement (50) for a Pre-Insertion Resistor (PIR) wherein a control rod (20) is arranged to move a movable contact (30), against the force of a biasing member (18), into temporary connection with a PIR. The control rod (20) comprises a tulip (21) with a plurality of resilient fingers (24) and having a first diameter where it is able to mechanically couple to a latching ring (31) on the movable contact (30), and a second diameter where the tulip (21) is deformed with the fingers (24) deflected inwards, once the resistance to movement exceeds a predetermined value, wherein the latching ring (31) is able to pass over the tulip (21) to decouple the movable contact (30) from the control rod (20). The contact arrangement (50) is particularly suited for a PIR arranged for connection in parallel to the interrupter of a gas-insulated switchgear (GIS) circuit breaker.

A modular and adaptable power system may be used to provide electrical power connections in an industrial work site, such as a mine. The system provides a plug-and-play interchangeable output module that can be quickly and easily disconnected from and reconnected to a separate and independent input/feed-through module. This allows a user to daisy chain multiple input/feed-through modules together, thereby greatly reducing setup time. Output modules can be quickly disconnected and relocated and returned to previous locations and reconnected.

A modular and adaptable power system may be used to provide electrical power connections in an industrial work site, such as a mine. The system provides a plug-and-play interchangeable output module that can be quickly and easily disconnected from and reconnected to a separate and independent input/feed-through module. This allows a user to daisy chain multiple input/feed-through modules together, thereby greatly reducing setup time. Output modules can be quickly disconnected and relocated and returned to previous locations and reconnected.

Disclosed is a method of manufacturing an offshore substation topside for assisting in transporting electricity generated by an offshore wind farm arranged at a first location to land. The offshore substation topside comprising a first deck and a first block arranged on the first deck, wherein the first block comprises a plurality of modules including a first module and a second module, each module of the plurality of modules comprises one or more standardized sections selected from a group of standardized section, each standardized section comprises a self-supporting frame. The first module of the plurality of modules is manufactured at a second location, the first module and the second module of the plurality of modules having at least one standardized section in common, and the plurality of modules being assembled into the first block at a location remote from the second location.

An arrangement includes a gas-insulated switchgear which is configured for filling with a first electrical insulation fluid. A surge arrester is provided to reduce the protection level of the gas-insulated switchgear such that the switchgear has insulation spacings of at most the same size as those of a switchgear insulated with a second electrical insulation fluid which has a higher dielectric strength than the first electrical insulation fluid.