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D45AT2 — Three-phase autotransformer 230 → 400

Three-phase autotransformer intended for homes and residential installations with a 230 V three-phase supply that need to power equipment or a circuit designed for 400 V. It adapts voltage without providing galvanic isolation.

The IP23 version is intended for indoor installation in a protected environment. As an autotransformer, input and output are not electrically isolated; suitability for the equipment and the home's protection scheme must be checked. 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 V

Frequency
50/60 Hz

Thermal class
<80 kVA: F (140ºC) / Ta=40ºC - ≥80 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
YN0

Relevant parameters
Reversible: 230 / 400 V o 400 / 230 V

Application

230 V to 400 V adaptation in residential three-phase installations

References and dimensions

Reference	Power	Input voltage	Output voltage	A × B × C	Weight
340D45AT2	4 kVA	230 V	400 V	287 × 226 × 340 mm	20 kg
363D45AT2	3 kVA	230 V	400 V	345 × 310 × 377 mm	30 kg
380D45AT2	8 kVA	230 V	400 V	345 × 310 × 377 mm	35 kg
410D45AT2	10 kVA	230 V	400 V	345 × 310 × 377 mm	44 kg
413D45AT2	13 kVA	230 V	400 V	406 × 310 × 460 mm	51 kg
416D45AT2	16 kVA	230 V	400 V	406 × 310 × 460 mm	57 kg
420D45AT2	20 kVA	230 V	400 V	477 × 390 × 500 mm	77 kg
425D45AT2	25 kVA	230 V	400 V	477 × 390 × 500 mm	85 kg
431D45AT2	31.5 kVA	230 V	400 V	575 × 460 × 606 mm	114 kg
440D45AT2	40 kVA	230 V	400 V	575 × 460 × 606 mm	130 kg
450D45AT2	50 kVA	230 V	400 V	575 × 460 × 606 mm	161 kg

Dimension reference

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

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