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)
CT Cores with other dimensions or permeability levels are also available upon request as well as complete wound CT Components (see checklist).
Ip max: Max. AC Primary Current
Idc, max: Max. half wave rectified AC amplitude without saturation
φ(I): Max. Phase Error for I < Ip,max
L: Nom. Inductance for I < Ip,max
Rcu: Winding resistance
Rb: Recommended Burden Resistor, so Ub is ca. 0,3 V