Inductive Current Transformer JOF T high voltage

Inductive Current Transformer JOF T high voltage

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Inductive Current Transformer JOF T high voltage,
Current transformers type JOF T are used in high voltage networks,
within the 24-72 kV range.
They transform high voltage into standardised values for meters,
measuring and protection devices.

Features

  • Oil-paper insulated
  • Simple primary winding changeover
  • Robust design
  • Earthquake-resistant
  • Low center of gravity

Technical data

Type JOF T

24

36

52

72
Standard IEC / IEEE
Highest voltage for equipment kV 24 36 52 72.5
Rated power-frequency withstand voltage kV 50 70 95 140
Rated lightning impulse withstand voltage kV 125 170 250 325
Frequency Hz 16.7 / 50 / 60
Primary rated current A ≤ 2000
Secondary rated current A 1 / 5
Rated short-time thermal current [Ith] kA / 1s ≤ 40
Rated dynamic current [ldyn] kA ≤ 100
Accuracy class 0.1-3; 0.2S; 0.5S; P; PR; PX; PXR; TPX; TPY; TPZ
Max. number of CT cores 7

Type JOF

24

36

52

72
Height of unit* A mm 1386 1386 1580 1580
Height to primary terminal* B mm 1221 1221 1416 1416
Depth of unit including terminal box C mm 668 668 668 668
Depth of unit base D mm 361 361 361 361
Width of unit base E mm 360 360 360 360
Distance between screw holes at base F mm 310 310 310 310
Min. creepage distance*   mm 900 900 1813 1813
Approximate weight*   kg 200 200 230 230

 

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