TU__ Measuring transformers

Description: Current transformer TU__ for measurement instrumentation. Is a transformer for primary through, either for cable or for bus-bar. The casing is made of plastic.

Connections

Dimensions

The TU_ transformer have different trasformation ratios, for primary ones from 30 A to 1000 A and secondary ones at 1A or 5A. Precision classes can be 0,5. 1 or 3 according to IEC 61869-2.

Model/ Bus-bar / Cable
TU20/ 20×5/ Ø16
TU30 / 30×10 / Ø22
TU40 / 40×10 / Ø30

  • Bus-bar
  • For cable or bus-bar
  • Plastic casing

Standards

  • IEC 185
  • UNE EN 6169 (IEC 61869)
  • VDE 0414
  • IEC 801/1-3.4
  • DIN 57414
  • BS 3938
  • EN 50081
  • EN 50082
  • IEC 1010

General technical specifications.

  • Security factor: Fs < 5
  • Rated voltage (maximum): 720 V
  • Test voltage: 3 kV AC (1min)
  • Frequency: 50 – 60 hz
  • Rated short-time thermal current: Ith limited by cable sizes or primary bus-bar
  • Rated dynamic current: IDyn = 2,5 x Ith
  • Continuous overload: ID = 1,2 x In
  • Operating temperature: -10 … 50 ºC
  • Accuracy: 0,5; 1 and 3 (0,2s; 0,5s on request)
  • Rated secondary current: /5 or /1A
  • Insulation class: Class E // Class B (130 ºC) Available

Details of product relationship table:

       

 

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