200A DC Immune CTs for Thread Through Meters


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40-200A- CL 0.1 DC Immune CT

Energy meter CT’s made using hybrid cores are DC immune current transformers for energy meters meeting IS 13779 / IEC 62053. This particular CT is developed in customized casing and metal shield,(optional) for protection against external magnetic field. This CT finds exclusive application in “Thread Through” or “Cable Through” type energy meters. The wound CT is epoxy potted for durable and long life performance. Number of turns can be wound/adjusted as per customer requirements. CTs can be provided with or without metal shield in custom casings.

Electrical Specification:

    Model   CT 200A
    Inductance   400-1200H to 250-800H
    DC Resistance   225-650 ohms
    No. of turns   5000
    Operating temp.   -40° C ≈ 70° C
    Storage Temp   -40° C ≈ 85° C
    Core material   Nano crystalline and Amorphous (Hybrid)
    Accuracy   0.5-1.0 class

Mechanical Specification:

    Plastic Casing   Nylon 6 (Black)
    Secondary termination   PVC (Red/Black)
    Approx wt.   121.1 gms
    Metal Plate (inside)   Zinc plated Mild Steel, 0.3mm thick
    Epoxy material   Non- hygroscopic Transparent / black/Red/ White potting  material


  • For Thread-Through or Cable-Through type Energy Meters
  • DC Immunity as per IS 13779 / IEC 62053
No. Item Description Material
1 Core 68 OD x 43 ID x 18.0 Th (200A) Hybrid Core
2 Wire 38 SWG Enameled Copper
3 Epoxy Acrabond 774 /Dr Beck Epoxy
4 Lead wire PVC/PTFE Multi strand --