JKS / JKS-S

CURRENT TRANSFORMERS | INDOOR OPERATION

  • Split core CT
  • Hole diameters up to 200 mm
  • Various sizes available (modular)
  • Pirmary current up to 3000 A

Split core cable current transformers of type JKS / JKS-S are used in indoor switchgears. They transform high currents up to 3000 A into standardised values for meters, measuring and protection devices.

General description

Split core cable current transformers of type JKS / JKS-S are used in indoor switchgears. They transform high currents up to 3000 A into standardised values for meters, measuring and protection devices.

The split core cable current transformer is designed for subsequent installation on fully insulated medium and high voltage cables. This enables retrofitting of existing systems in a simple manner. Primary currents of up to 3000 A can be measured.

A specific core padding ensures that the magnetic properties, and therefore the class accuracy, remain constant for decades. The active part is cast in polyurethane (PUR). Type JKS transformers come with a housing degree of protection up to IP 20; type JKS-S transformers up to IP 40. Thanks to a wide range of geometric dimensions the cable current transformer can be adapted to customer requirements. Any installation position is normally possible.

Advantages
JKS-S
  • Suitable for subsequent installation over fully insulated HV and MV cables

  • Suitable for indoor applications with degree of protection IP 20, on request IP 40

  • Wide range of geometric dimensions

  • Secondary terminals for cables up to max. diameter of 6 mm2
Advantages
JKS
  • Suitable for subsequent installation over fully insulated HV and MV cables

  • Suitable for indoor applications with degree of protection IP 20, on request IP 40

  • Wide range of geometric dimensions

  • Secondary terminals for cables up to max. diameter of 6 mm2

  • Particularly suitable for special classes or very high output levels
Technical data
Type JKS / JKS-S
StandardIEC / IEEE
Highest voltage for equipmentkV0.72
Rated power-frequency withstand voltagekV3
FrequencyHz16.7 / 50 / 60
Primary rated currentA1 - 3000
Secondary rated currentA1 / 5
Rated short-time thermal current [Ith]kA / 1s100 x In
Rated dynamic current [Idyn]kA2.5 x Ith
Accuracy class0.1-3; 0.2S; 0.5S; P; PR; PX; PXR; TPX; TPY
Max. number of CT cores1
 
Type JKS-S
Height of unitHmm130200270
Fastening dimensionBmm80150200
DiameterDmm90 / 120 / 15090 / 120 / 15090 / 120 / 150