3 AC Transformer Bank

3 AC Transformer Bank

The 3 AC transformer bank is an A4 module that includes three independent power transformers. It includes three identical, independant transformers that can be connected in wye or delta configurations. The transformers windings are polarized and the polarity of each winding is indicated by a small dot on the module front panel. The primary sides consist of a single 400V winding each, the secondary winding is split at 230/170 V each.


  • Includes three 100 VA transformers
  • Allows connection in either wye or delta configuration
  • Transformation ratio is 1:1 each
  • additional 230 V tab on the secondary winding
  • Self resetting fuses protect the primary and secondary windings
  • Red LEDS indicate the protected state on the front panel
  • Protective conductor connection, 4 mm² minimum diameter and deliberately unmistakable with 4 mm safety plug connections to prevent mix-up

Technical data

  • Primary rating: 400 V AC, max. 0.25 A each transformer
  • Secondary rating: 400/230 V AC, max. 0.25 A each transformer
  • Frequency: 50/60 Hz
  • Nominal power: 100 VA each transformer
  • Designed for A4 mounting frames
  • Dimensions (H x W x D): 297 x 266 x 140 mm
  • Weight: 9.8 kg