Frost® Ground Contacts The mechanical structure of our frost® ground contacts meet effective national and international standards and directives. Material pairing is consistently optimised. The design resp. working direction of the carbon brush is distinguished between axial and radial active contact system. Conventional round brush designs have been replaced by multiple brush designs in the area of standard applications. The reasons for this are, among others, the increased possible power transmission and in part, the simpler make-up of the contacts. We have consistently continued to develop the successful path to multiple brush contacts and in the process, devised the successful frost® pressure system.