120A DC Immune CTs for Thread Through Meters

Product Description

Energy meter CT’s made using hybrid cores are DC immune current transformers for energy meters meeting IS 13779 / IEC 62053. The CT is small in size with customized casing and metal shield, (optional) for protection against external magnetic field. 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 (20-120 Amps)
    Inductance   80-270H
    DC Resistance   80-100 ohms
    No. of turns   2500
    Operating temp.   -40° C ≈ 70° C
    Storage Temp   -40° C ≈ 85° C
    Core material   Nano crystalline and Amorphous (Hybrid)
    Accuracy   0.1 class

Mechanical Specification:

    Plastic Casing   Nylon 6 / ABS / PC / PBT ( as per customer spec)
    Secondary termination   PVC / PTFE multi-strand wires or pcb solder pins
    Approx wt.   As per model
Metal shield   Zinc plated Mild Steel, app 1.5 /1.6mm thick, deep  drawn
    Epoxy material   Non- hygroscopic Transparent / black potting material
    Primary conductor   Finished CTs with 8 / 9 mm dia hole or with built-in copper bus bar/braided wire of suitable current rating

Mechanical Dimensions :

120A-drawing

Application

  • For direct connected / whole current Energy Meters
  • DC Immunity as per IS 13779 / IEC 62053

Advantages

  • Many custom designs possible
  • Can be provided as full assembly, comprising of CT with primary conductor and welded brass terminals
  • Small size

Mechanical List:

No. Item Description Material
1 Core 30 OD x 20 ID x 8.0 Th Hybrid Core
2 Wire 38 /40 SWG Copper- Multi Strand
3 Epoxy Acrabond 774 /Dr Beck Epoxy
4 Lead wire PVC/PTFE Multi strand --
5 Metal shield Deep drawn, Zinc plated, 1.5mm Mild Steel