TF706311442:
Three-phase oil distribution transformer

In accordance with the standards
EN 50588-1 AAoAk
Eco design (Eu) 548-204 TIER 2
CEI 60076-1
Extra reduced losses AAoAk

Rated power630 kVA
Rated primary voltage11 400 V
Rated secondary voltage (off load)420 V
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Standard technical specifications

  • Cooling: ONAN (natural)
  • Thermal classification-(Heatings) oil and windings: A- 65/60 K
  • Max. ambient t°: 90°C
  • Rated primary voltage (one primary voltage such as): +-2,5+-5%
  • Max. rated primary insulation level: 17,5 kV
  • Vector group: Dyn11
  • Frequency: 50 Hz
  • No load losses: 540 W
  • On load losses by 75°C: 4600 W
  • Impedance voltage: 4%
  • Voltage drop at full load:
  • At P.F. =1: 0,81%
  • At P.F. =0,8: 2,98%
  • Efficiencies To confirm: 4/4 3/4 2/4 1/4
  • By cos phi=1: 99,16 99,30 99,41 – %
  • By cos phi=0,8: 98,95 99,13 99,26 – %
  • Noise level:
  • Acoustic pressure at 1 m (Lp): 41 dBA
  • Acoustic power level (Lw): 51 dBA
  • Overall dimensions: L x W x H: 1260 x 850 x 1745 mm
  • Total weight: 2450 Kg
  • Oil weight: 345 Kg

Fittings

Standard fittings:

  • 3 HV Plug in Bushings fixed part only
  • 4 LV DIN porcelain Bushings with their cable clamps
  • 2 earthing terminals
  • 2 lifting lugs
  • 1 rating plate Cotrabel Dutch/French
  • 1 filling plug
  • 1 combined drain and sampling valve Type DIN
  • 1 DMCR
  • 4 bi-directional flat rollers

Execution

  • Hermetical sealed type
  • Ester oil or similar in accordance with the standard IEC60296 class II
  • Welded cover
  • Overloads in accordance with the standard IEC 60354
  • Tolerances in accordance with the standard IEC 60076-1
  • Aluminium windings

Remark

Po and Pcc losses without tolerances