With VARIS™ PRO, GvA Leistungselektronik GmbH offers a new ultra-compact converter in the megawatt range - ready for connection, flexible and suitable for the most diverse applications.

Proton-Electrotex JSC, well-known manufacturer of semiconductors and stacks, based in Orel, 380km south of Moscow, takes over the distribution of the modular inverter system VARIS™ by GvA Leistungselektronik GmbH on the Russian market.

With VARIS™, the new Modular Inverter System, GvA Leistungselektronik GmbH focuses on sustainable solutions with standardized and cost-efficient inverters. The modular approach also provides the flexibility required for diverse applications.

With GvA Leistungselektronik GmbH based in Mannheim Fuji Electric Europe GmbH, Offenbach, relies in the future on a well-known partner for the sales of its portfolio of power semiconductors in Germany.

Insulation voltage, test voltage, partial discharge and insulation strength – terms development engineers frequently have to deal with. But how are they related and which aspects and data are ultimately relevant to the developer?

By Werner Bresch, Tobias Gmelin and Erik Rehmann, GvA Leistungselektronik GmbH

New IGBTs and IGCTs, together with appropriate snubber and freewheeling diodes up to 5.5 kV (6.5 kV respectively), are opening up the possibility of establishing power electronics for the medium voltage level with manageable effort. Tri–level switching topologies and cascaded switching systems are the preferred architectures used here.

By Werner...