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Silver tin oxide (Ag/SnO2) contact materials are widely used for relays and contactor applications. Device approbation in accordance to standards requires several types of temperature rise test in new and switched conditions. Significant differences in temperature rise after the various switching sequences are experienced. In addition, differences between individual phases of one device - especially...
The dynamic welding behavior at make operation is one important characteristic of electrical contacts and a key parameter to ensure secure usage of electricity. Model switch and device tests have been performed to work out the main factors influencing contact sticking. The behavior of different silver metal oxides (Ag/CdO, Ag/SnO2, Ag/ZnO), including various groups of additives like low melting and...
Latest developments in the fields of regenerative energies, industrial automation and automotive application generate new technical requirements for switching devices and contact materials. Rising energy densities in such devices were simulated by contactor endurance tests under heavy duty load. The results show a strong exponential relationship between arcing energy at break and contact material...
Latest developments in relay applications are combining needs for low weld break forces, low arc erosion and material migration and excellent mechanical formability. This is due to trends like miniaturization, precious metal saving, and electrical loads with high inrush currents.
The focus of the experimental studies was in the influence of contact material composition, production parameters and the contact material - breaker interaction, as the performance of the breaker is a function of breaker design, contact material and especially their interaction. Therefore, typical material combinations used for low voltage protection devices were compared by means of their switching...
The focus of the studies is on the influence of contact material production parameters, and the contact material breaker interaction of material combinations used for low voltage protection devices. The influence of the magnetic blast field and the material composition on erosion behavior and contact resistance of AgW materials will be scrutinized by model-switch tests. Especially the mass loss during...
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