We produce supporting type current transformers for indoor installation. They contain up to five cores for revenue metering and protection purposes, constructed from high quality siliceousor nickel steel laminations. All active parts are altogether impregnated with cycloaliphatic outdoor resin. In case 1:2 reconnection is requested, thiscan be achieved either by mounting reconnection bars to the primary terminals, or by an intermediate terminal at the secondary coil. Each terminal of the secondary coil can be grounded individually directly to the metal base through a bolt. These types aremaintenance free,and with respect to their main dimensions many types correspond to the German standards DIN 42600.