OSI is now offering Rogowski based high-current AC measurement systems. The CTRS family is capable of measuring from 1 kA up to 40 kA utilising a Rogowski head which will fit busbars/bus-tubes from 165 mm up to 540 mm in diameter.
The signal from the Rogowski head is processed by an integrator and industry standard outputs are available, i.e., 0 – 5 V, 0 – 10 V, 0 – 1 mA and 4 – 20 mA. Instrument power of 115/ 230 V a.c. is required but, since there is no iron core, installation is simplified where space is at a premium. Accuracy is ±1% with a linearity of ±0,25%.
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