E75TT2 — Three-phase step-up 230 V → 400 V
Three-phase step-up transformer intended for homes and residential installations with a 230 V three-phase supply that need to power equipment designed for 400 V. Unlike an autotransformer, it maintains galvanic separation between the incoming supply and the output.
The IP23 version is intended for indoor installation in a protected environment. It is suitable where electrical separation from the original supply is required in addition to voltage conversion. It is also designed for residential use with quiet operation and low energisation inrush current, reducing the risk of nuisance circuit-breaker tripping.
Technical data
230 V
400 / 400 / 400 V
50/60 Hz
<31,5 kVA: F (140ºC) / Ta=40ºC - ≥31,5 kVA: H (165ºC) / Ta=40ºC
IP-23
AN
Class I
4,5 KV
Dyn11
Not applicable
Application
230 V to 400 V step-up with isolation for residential use
Three-phase step-up transformer intended for homes and residential installations with a 230 V three-phase supply that need to power equipment designed for 400 V. Unlike an autotransformer, it maintains galvanic separation between the incoming supply and the output.
The IP23 version is intended for indoor installation in a protected environment. It is suitable where electrical separation from the original supply is required in addition to voltage conversion. It is also designed for residential use with quiet operation and low energisation inrush current, reducing the risk of nuisance circuit-breaker tripping.
References and dimensions
| Reference | Power | Input voltage | Output voltage | A × B × C | Weight |
|---|---|---|---|---|---|
| 325E75TT2 | 2.5 kVA | 230 V | 400 / 400 / 400 V | 345 × 310 × 377 mm | 30 kg |
| 340E75TT2 | 4 kVA | 230 V | 400 / 400 / 400 V | 345 × 310 × 377 mm | 44 kg |
| 363E75TT2 | 6.3 kVA | 230 V | 400 / 400 / 400 V | 406 × 310 × 460 mm | 57 kg |
| 380E75TT2 | 8 kVA | 230 V | 400 / 400 / 400 V | 477 × 390 × 500 mm | 77 kg |
| 410E75TT2 | 10 kVA | 230 V | 400 / 400 / 400 V | 477 × 390 × 500 mm | 85 kg |
| 413E75TT2 | 13 kVA | 230 V | 400 / 400 / 400 V | 575 × 460 × 606 mm | 114 kg |
| 416E75TT2 | 16 kVA | 230 V | 400 / 400 / 400 V | 575 × 460 × 606 mm | 130 kg |
| 420E75TT2 | 20 kVA | 230 V | 400 / 400 / 400 V | 575 × 460 × 606 mm | 161 kg |
| 425E75TT2 | 25 kVA | 230 V | 400 / 400 / 400 V | 575 × 460 × 606 mm | 183 kg |
| 431E75TT2 | 31.5 kVA | 230 V | 400 / 400 / 400 V | 727 × 600 × 810 mm | 230 kg |
| 440E75TT2 | 40 kVA | 230 V | 400 / 400 / 400 V | 727 × 600 × 810 mm | 254 kg |
| 450E75TT2 | 50 kVA | 230 V | 400 / 400 / 400 V | 727 × 600 × 810 mm | 315 kg |
Dimension reference
Dimensions A, B, C, d and e in the table correspond to those shown in this image.

