Outdoor Current Transformers


Our manufacturing program also includes supporting type current transformers for outdoor installation. The resin is cycloaliphatic and outdoor proof. Because it is vacuum impregnated and cured under a long thermally controlled cycle, an insulating material of high electrical and mechanical qualities, resistance to ultraviolet rays and the effects of tracking, erosion and ageing, is thus obtained. For an increase in the creep age distance, the insulation body is equipped with double sheds, the shape of which has been determined aftermany years of research. They contain up to five cores for revenue metering and protection purposes, constructed from high quality siliceousor nickel steel laminations. 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.

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 > 5000 N
Partial discharge free, according to IEC 61869-2