![]() Thorne & Derrick are national distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing businesses involved in cabling, jointing, substation, earthing, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV. The Group is headquartered in Winterbach, near Stuttgart in southern Germany. Pfisterer is a leading independent manufacturer of cable, connectors, insulators and overhead line accessories for sensitive interfaces in energy networks. These products are widely used in auto parts, cycle parts, fasteners. He has in-depth knowledge of related production processes, quality and environmental management and holds patents for bolted technology and ring connector technology. Manufacturer of Industrial Nuts - Breakaway Nuts, Torque Nuts, Shear Nuts and. Typically installed between a fixed point and a hose line, Stubli’s industrial breakaway couplings prevent risk of spills, protect your installation and ensure operator safety on a broad range of applications requiring a secure fluid transfer. He has had more than 24 years of experience in manufacturing as R&D-Manager for connectors and fittings with Pfisterer as well as in development of underground power cables and accessories. Hardt is an Electrical Engineering professional. Those same principles and connector body design have been adapted and optimized to cover cross-sections of up to 3000sqmm and even for HV/EHV applications.īy Fak Hardt | Head of Product Portfolio & Cable Accessory Development, Pfisterer Holding, Germany This created a user-friendly and reliable connector, simplifying allocation of conductor cross-section to connector. The most important advantage of bolted contacts is that one connector type applies for different cross-sections and conductor materials. Fasteners for Solar and Green Energy Industry Bolts, Nuts, Screws and Specialty. At the same time, IEC 601238-1 was established to replace former local standards and set higher requirements in terms of contact ageing. Aluminum Breakaway Nut / Non-Removable Security Tamper Resistant Nut. In the 1990s, connector manufacturers introduced different types of multiple shear bolts, allowing a requested torque moment to a particular cable cross-section while ensuring that bolts shear off flat with the outer circumference of the connector body. But cable accessories up to 42kV require concentric connector bodies and smooth outer surface, without sheared off bolts standing proud and no sharp edges at the connector and bolts. ![]() Based on positive field experience, shear bolt connector technology was adapted for use in medium voltage applications as well. ![]() The next step was adopting shear bolt technology for use in low voltage cable applications, where required torque moment was a pre-set parameter machined into the bolt. The principle was first introduced in the early 1980s when manufacturers sold the first types of low voltage bolted connectors. ![]() The technology of shear bolt connectors for current transmission has developed quickly. Shearbolt Connectors for LV/MV Underground Power Cables: Reliability & Failure Modes ![]()
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