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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

Input voltage
230 V
Output voltage
400 / 400 / 400 V
Frequency
50/60 Hz
Thermal class
<31,5 kVA: F (140ºC) / Ta=40ºC - ≥31,5 kVA: H (165ºC) / Ta=40ºC
Degree of protection
IP-23
Cooling
AN
Protection against electric shock
Class I
Test voltage
4,5 KV
Vector group
Dyn11
Relevant parameters
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

ReferencePowerInput voltageOutput voltageA × B × CWeight
325E75TT22.5 kVA230 V400 / 400 / 400 V345 × 310 × 377 mm30 kg
340E75TT24 kVA230 V400 / 400 / 400 V345 × 310 × 377 mm44 kg
363E75TT26.3 kVA230 V400 / 400 / 400 V406 × 310 × 460 mm57 kg
380E75TT28 kVA230 V400 / 400 / 400 V477 × 390 × 500 mm77 kg
410E75TT210 kVA230 V400 / 400 / 400 V477 × 390 × 500 mm85 kg
413E75TT213 kVA230 V400 / 400 / 400 V575 × 460 × 606 mm114 kg
416E75TT216 kVA230 V400 / 400 / 400 V575 × 460 × 606 mm130 kg
420E75TT220 kVA230 V400 / 400 / 400 V575 × 460 × 606 mm161 kg
425E75TT225 kVA230 V400 / 400 / 400 V575 × 460 × 606 mm183 kg
431E75TT231.5 kVA230 V400 / 400 / 400 V727 × 600 × 810 mm230 kg
440E75TT240 kVA230 V400 / 400 / 400 V727 × 600 × 810 mm254 kg
450E75TT250 kVA230 V400 / 400 / 400 V727 × 600 × 810 mm315 kg

Dimension reference

Dimensions A, B, C, d and e in the table correspond to those shown in this image.

Dimension reference · E75TT2

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