TEH TTT

 MV/LV Outdoor Transformer

The TEH TTT transformers is designed to transform three phase MV voltage at 5500 V down to 410 V (no load). The different power ratings available for the transformer is especially chosen to match the standards of public lighting applications.

 TEH

The TEH is designed for outdoor installations. The watertight metal tank is specially treated against corrosion, which allows it to be installed in a sublevel accessible concrete pit.

Standard Features :

  • The AD7 environment certification allows the transformer to be partially or wholly covered in water on a temporary basis
  • Protection level at IP 68
  • LV output through 4 single pole cables of H 07 RNF (TEH 50 and 80 kVA has 4 x 1 x 35 mm2, while TEH 100 kVA has 4 x 1 x 50 mm2 cable cross-sections.)
  • The LV neutral is connected to the earth terminal inside the transformer
  • MV protection through three HRC fuses with a breaking capacity at 15 kVA
  • The earth connection rods are soldered to the cover and the tank
  • Three thermal probes incorporated in the windings ensure thermal protection of the equipment
  • The tap changer for voltage adjustments is operated by a switch and it is only operational at off-load.

  • Power ratings 50, 80, 100 kVA
  • Primary voltage 5500 V (other values on request)
  • Primary winding insulation 7,2 kV
  • Secondary no-load voltage 410 V (other values on request)
  • Secondary winding insulation 1,1 kV
  • Vector group at 50 kVA is Yzn 11, at 80 & 100 kVA is Dyn 11
  • The impulse withstand voltage is 60 kV - wave 1/50
  • The power frequency withstand is 22 kV at 50 Hz for 1 minute
  • Dielectric is oil
  • Off-load adjustment plugs + 5, + 7,5 % (other values on request).