Yes, the cables for the current transformers can be extended with a twisted pair cable. A pair is required for each current transformer. Total loop resistance should be kept below 10 ohms. The maximum length the cable can have without affecting the measurement accuracy is then given by:



Twisted pair cableMaximum cable length

3x2x0,16 mm2

46 m

3x2x0,25 mm2

72 m

3x2x0,50 mm2

145 m

3x2x0,75 mm2

218 m

3x2x1.0 mm2

290 m


Note that the measurement accuracy can still be affected if long cables run in parallel with other live cables. In such cases, a shielded cable can contribute to reduced crosstalk from the adjacent cables.