ECTB 31.35



Plug-in current transformer for primary nominal currents from 50 A up to 750 A, secondary nominal current 5 A or 1 A , accuracy classes 0.2, 0.5s and 0.5, with type approval by PTB Braunschweig for use for billing purposes.

The new CTB’s connection is arranged with a "cage clamp ®".


Technical Data

  • Therm. nominal continuous current Icth: 1,2 x IN
  • Therm. nominal short-time current Ith: 60 x IN, 1 sec.
  • Max. operating voltage Um: 1.2kV
  • Isolation test voltage: 6 kV, Ueff, 50 Hz, 1 min.
  • Nominal rated frequency: 50...60 Hz
  • Isolation class: E
  • Bus bar 1: 30 x 10 mm
  • Bus bar 2: 25 x 12 mm
  • Bus bar 3: 20 x 20 mm
  • Round conductor: 25,7 mm
  • Width: 60 mm
  • Height: 80,9 mm
  • Depth: 52 mm

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