CT - 2FRO


Reference current transformer for range extension of capacitance and power factor measurement.
- nominal primary currents 40 A, 400 A
- transformation ratios 1 : 10 und 1 : 100
- working range 1 ... 120 % of nominal current
- uncertainty of transformation ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.

Technical Data

CT - 3FRO


Reference current transformer for range extension of capacitance and power factor measurement.
- nominal currents primary 10 A, 220A and 660 A
- transformation ratios 1 : 10, 1 : 100 and 1 : 250
- working range 1 ... 100 % of nominal current
- uncertainty of ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.

Technical Data

CT - N1K0


Reference current transformer with nominal primary currents (IN): 1'000, 500, 250, 125, 100, 50, 25, 12.5, 10, 5 A
- nominal secondary current 5 A
- rated burden 5 VA
- working range 1 ... 200 % of nominal current
- uncertainty of ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.
- overload protection with indication

Tech. Data

- nominal secondary current 5 A
- rated burden 5 VA
- working range 1 ... 200 % of nominal current
- uncertainty of ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.
- overload protection with indication

Tech. Data

CT - N2K0


Reference current transformer with nominal primary currents (IN): 2'000, 1'000, 500, 250, 125, 100, 50, 25, 12.5, 10, 5 A
- nominal secondary current 5 A
- rated burden 5 VA
- working range 1 ... 200 % of nominal current
- uncertainty of ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.
- overload protection with indication

Tech. Data

CT - N5K0


Reference current transformer with nominal primary currents (IN): 5'000, 2'500, 1'250, 1'000, 500, 250, 125, 100, 50, 25, 12.5, 10, 5 A
- nominal secondary current 5 A
- rated burden 5 VA
- working range 1 ... 200 % of nominal current
- uncertainty of ratio ± 0.001 %
- uncertainty of phase ± 0.05 Min.
- overload protection with indication

Tech. Data

CT - N6K0


Reference current transformer with nominal primary currents (IN): 6'000, 3'000, 1'500, 1'200, 600, 300, 150, 120, 60, 30, 15, 12, 6 A

Our active standard current transformers based on the current comparator principle. With an indicator winding the magnetic flux in the iron core is measured and fed back into the iron core to make the magnetic flux zero. This way we can grant a 10 ppm uncertainty for ratio and phase and this over a very broad working range.

The application of our standard current transformers include range extension for capacitance and  tand measurements (cable drums or power capacitors), as reference for current transformer measurements as well as calibration and metrology purposes.