Indoor Current Transformers


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.

Um up to 36 kV
Test voltages up to 36 / 70 / 170 kV
Frequency 50 / 60 Hz or 16 2/3 Hz
Rated primary current up to 2500 A or with reconnection up to 2 x 1000 A
Rated secondary current 1 A or 5 A
Accuracy class 0,1 up to 3 for measuring and 5P or 10P for protection
Rated thermal current Ith = 100…500 x IN
Dynamic current Idyn = 2,5 x Ith (max 120 kA)
Cantilever strength > 3500 N
Partial discharge free, according to IEC 61869-2