Protection transformers TU3_

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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

Plastic casing
TU3BCP
TU40CP

Resin casing
TU3PR
TU50R

Protection transformers
Wound primary
For cable or bus-bar
Plastic casing

Standards

  • IEC 60185
  • UNE EN 618691 (IEC 618691)
  • UNE EN 618692 (IEC 618692)
  • VDE 0414
  • IEC60801-3.4
  • DIN 57414
  • BS 3938
  • EN 50081
  • EN 50082
  • IEC61010
  • UL94-V0

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

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Protection transformers TU3_

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Protection transformers TU3_