DC Immune CT Cores

DC immune Current Transformer Cores made of NANOPERM® LM for Smart Meters

Note:

CT Cores with other dimensions or permeability levels are also available upon request as well as complete wound CT Components
Our DC immune tape wound cores for Smart Meters are based on the nanocrystalline material NANOPERM® LM. Compared to conventional Metering cores the NANOPERM® LM products show following benefits:
  • High linearity over the whole primary current range
  • Easy to compensate
  • Very low temperature drift
  • DC immune acc. to IEC 62053; EN 50470-3
  • Ready for the next regulation update reg. supplementary Power Factor conditions
Standard designs for Core finishing:
  • Plastic box (material UL listed, QMFZ2 E41938)

Standard Current Transformer Cores – DC immune

Type DC Immunity lfe afe µ @ 50Hz, Nom. Dim. Finished Dim. Fix
[A] [cm] [cm2] H = 1A/cm da x di x h Da x Di x H
[mm] [mm]
M-389 20 5.4 0.09 3.4 19.1 x 15.2 x 6 20.5 x 13.8 x 7.8 Case
M-749 40 5.5 0.12 3.4 20 x 15.3 x 6 22 x 13.8 x 8 Case
M-375 60 6.1 0.12 2 22 x 17 x 6 23.4 x 15.8 x 7.8 Case
M-880 80 6.2 0.08 1.6 21.5 x 18 x 6 22.9 x 16.8 x 7.7 Case
M-361 100 7.1 0.11 1.6 25 x 20.1 x 6 26.5 x 18.8 x 7.8 Case
M-391 120 8.6 0.12 1.6 30 x 24.8 x 6 31.4 x 23.6 x 7.6 Case
M-433 160 10.4 0.12 1.6 35.5 x 30.5 x 6 37.8 x 28.7 x 8 Case

Leave a Reply