DC current immunity composite core

DC current immunity composite core

 DC current immunity composite core is a special electrical component used in DC circuits, which offsets or reduces the DC part of the DC circuit by generating corresponding inductance. Therefore, it is prepared using both nanocrystalline and amorphous materials, fully utilizing their material properties and possessing good DC resistance through heat treatment processes.


Performance characteristics:

(1) Strong resistance to direct current;
(2) High precision, applicable level range 0.5-0.1;
(3) Applicable current range 5-200A;
(4) Excellent high and low temperature characteristics;
(5) High cost-effectiveness.


Application areas:

Anti DC component current transformer for electricity meter;
Power system measurement;
Control anti DC component current transformer.


Part No。

core dimensions

outside dimensions

CT accuracy

DC compliance

OD×ID×HT

OD×ID×HT

NA-DC-1

20×14×10

22.5×12.1×12.2

0.5-0.1class

40A

NA-DC-2

21×15×10

23.6×12.8×12.8

0.5-0.1class

40A

NA-DC-3

24×15.5×8

26.3×13.7×9.9

0.5-0.1class


60A

NA-DC-4

21×16×10

24.7×14.0×12.5

0.5-0.1class


60A

NA-DC-5

23×16×10

25.0×14.0×13.0

0.5-0.1class

60A

NA-DC-6

25×16×8

27.8×13.7×10.8

0.5-0.1class

60A

NA-DC-7

22×17×10

24.4×15.3×12.3

0.5-0.1class

60A

NA-DC-8

24×17×8

26.3×15.3×9.9

0.5-0.1class

60A

NA-DC-9

28×17×8

29.8×15.2×10.1

0.5-0.1class

65A

NA-DC-10

25×17×10

28.0×15.6×12.8

0.5-0.1class

80A

NA-DC-11

29×21×10

32.1×18.8×13.8

0.5-0.1class

80A

NA-DC-12

24×18×10

26.6×15.8×12.8

0.5-0.1class

100A

NA-DC-13

28×18×15

30.2×16.0×17.6

0.5-0.1class

100A

NA-DC-14

27×19×8

29.3×16.6×9.8

0.5-0.2class

100A

NA-DC-15

27×19×12

28.9×17.1×13.9

0.5-0.1class

120A

NA-DC-16

28×19×12

30.2×17.1×13.9

0.5-0.1class

120A

NA-DC-17

30×20×8

32.7×18.0×9.8

0.5-0.2class

120A

NA-DC-18

33×23×15

36.2×21.2×18.1

0.5-0.1class

200A

NA-DC-19

60×48×15

64.0×46.0×19.5

0.5-0.1class

200A




Production Steps

Insulation Systems

  • Cobalt-iron alloys: based on magnesium oxide (MgO)
  • Nickel-iron alloys: based on zirconium oxide (ZrO) = HITCOAT,  developed and patented by VAC

Gluing Technologies developed by VAC

  • Standard adhesive K-01 for maximum package density
  • High temperature adhesive HT-01 for applications up to 200 °C

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