Protection transformers TU3_

TU3_ current transformer for protection instrumentation. It is a transformer with wound primary for low currents. Its casing is made of plastic and it has the posisibility of being filled with resin for its installation in more hostile environments. The conenection can be for cabe or bus-bar.

Connections

Dimensions

The TU3_ transformer ratio for primary goes from 50A to 800A and secondary ones at 5A. The accuracy can be 5P10 or 10P10 according to the IEC61869-2 standar.

Plastic casing
TU3BCP
TU40CP

Resin casing
TU3PR
TU50R

Protection transformers
Wound primary
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 = 60 for wound primary
  • 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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Protection transformers TU3_

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Protection transformers TU3_