A high-voltage device includes a housing and at least one subassembly which is electrically insulated from the housing. The at least one subassembly is spaced from the housing and mechanically connected to the housing. At least one ceramic spacer element is disposed between the housing and the at least one subassembly. A method of using the high-voltage device includes transferring heat, which is produced at connection elements of the at least one subassembly which is electrically insulated from the housing, from the subassembly through the at least one ceramic spacer element to the housing and emitting the heat from the housing to the environment.

Disclosed are a transformer, and a power conversion apparatus or a photovoltaic module including the same. The transformer includes a first core including a base, a first protrusion member to protrude from the base, and a first external wall spaced apart from the first protrusion member and to surround the first protrusion member, a first winding wound in the first core, a second core including a second base, a second protrusion member to protrude from the second base, and a second external wall spaced apart from the second protrusion member and to surround the second protrusion member, a second winding wound in the second core, and a barrier rib configured to separate the first winding and the second winding from each other. Thus, ease of processing is achieved and radiation of electromagnetic noise is reduced.

An insertable high-voltage bushing includes an inner conductor which extends in a longitudinal direction between a high-voltage terminal and a plug-in section of the high-voltage bushing. The plug-in section is configured for the insertion of the high-voltage bushing into a device connection part of an electrical device. An insulating body at least partially extends around the inner conductor. A housing at least partially extends around the outside of insulating body. The housing includes a tubular housing element which extends between a head fitting at the high-voltage terminal of the high-voltage bushing and a mounting flange for fastening the high-voltage bushing to a device housing of the electrical device. The housing element is made of a composite material and a secondary insulation provided between the housing element and the insulating body is formed of a dry foam.

An insertable high-voltage bushing includes an inner conductor which extends in a longitudinal direction between a high-voltage terminal and a plug-in section of the high-voltage bushing. The plug-in section is configured for the insertion of the high-voltage bushing into a device connection part of an electrical device. An insulating body at least partially extends around the inner conductor. A housing at least partially extends around the outside of insulating body. The housing includes a tubular housing element which extends between a head fitting at the high-voltage terminal of the high-voltage bushing and a mounting flange for fastening the high-voltage bushing to a device housing of the electrical device. The housing element is made of a composite material and a secondary insulation provided between the housing element and the insulating body is formed of a dry foam.

Provided is an ignition coil device for an internal combustion engine with which a reduction in performance can be suppressed. In an ignition coil device for an internal combustion engine, a case main body houses an ignition coil device main body and an igniter. The igniter includes a circuit board and lead frames provided on the circuit board. The circuit board includes a substrate having a first surface and a second surface formed thereon. The substrate is arranged in a state in which the first surface faces a connector, and the second surface faces the ignition coil device main body. The connector includes connector conductors. The lead frames are provided on the first surface in a state of being opposed to the connector conductors.

A rupture reduction system for fluid-immersed electrical equipment includes a turret for mounting of a bushing. The turret is expandable in volume in response to a surge in pressure of the fluid in the turret. The expansion volume can be provided by an expandable section of the turret, which may include a bellows.

The present invention discloses a 220 KV transformer sleeve. The sleeve includes a sleeve assembly and a connecting assembly. The sleeve assembly includes a sleeve brace, an adjustable part coupled with the sleeve brace. The connecting assembly includes a rotating part and a mobile part. The sleeve is secured on the transformer core body through screws, and the adjustable part can be opened through the connecting assembly. When maintenance is required, there is no need to dismantle the entire sleeve. The work efficiency is greatly improved. This minimizes inductance leakage and prevents eddy currents from occurring.

Provided in the present invention is a 220 KV transformer movable sleeve for easy maintenance which includes a sleeve assembly and a connecting component. The sleeve assembly includes a sleeve and an end cap, and the access port is provided on the sleeve, the access port is matched with the end cap, and the connecting component includes a rotating part, a moving part and a driving part. The access port is arranged on the sleeve assembly, and the inspection can only be carried out by opening the access port during inspection, without dismantling the entire movable sleeve, and greatly improving the work efficiency. The rubber strip is combined with the metal sleeve. The method reduces the influence of magnetic flux leakage on the metal movable sleeve and prevents it from generating eddy current heating. Through the driving part, the end cap can be automatically opened, saving time and effort.

An electrical bushing is provided that includes a conductor, a conductive polymer screen, and an insulating body. The conductive polymer screen has a first region and a second region. The insulating body is molded over at least a portion of the conductor and is molded over the first region of the screen. The second region of the screen extends outward from the insulating body to define an exterior flange.

An electrical bushing is provided that includes a conductor, a conductive polymer screen, and an insulating body. The conductive polymer screen has a first region and a second region. The insulating body is molded over at least a portion of the conductor and is molded over the first region of the screen. The second region of the screen extends outward from the insulating body to define an exterior flange.