For high-voltage DC transmission systems, we offer special HVDC-DC and -DCAC wall bushings designed for outdoor/indoor or indoor/indoor – depending on the application and design.
These bushings, calculated and designed according to individual requirements, are offered dry-insulated or gas-insulated. All bushings are oil free.
This design can be implemented with dry filling up to approx. 550 kV. This can be identified by the small ‘t’ in the designation. Above this voltage value, the secondary insulation is implemented with SF6 gas filling. Gas pressure monitoring is required to ensure that the necessary overpressure is maintained. We supply the necessary gas pressure monitoring device for this purpose. Connection cables of various lengths are available to connect the monitoring device to the wall bushing.
The installation angle and the number of current transformers have a major influence on the flange length and can be individually adapted to customer requirements.
All bushings are designed to the IEC/IEEE standard 65700-19-03 and are tested accordingly. Bushings meeting other country requirements are available on request.
