Block Transformatoren-Elektronik GmbH & Co. KG products offer a virtually seamless system for your main network interface. From research and development to production and final certification, all Block products are develo......Block Transformatoren-Elektronik GmbH & Co. KG products offer a virtually seamless system for your main network interface. From research and development to production and final certification, all Block products are developed in-house, meaning Block can react quickly and flexibly to customer wishes.