Single-phase transformer 230 V / 400 V
Single-phase 400 V from a 230 V supply · 63 VA to 20 kVA · IP00, IP23 or IP54 · made in France
5.0 · 1 review63 VA0.16 A at 400 V
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- 2-year warranty · wound and tested in Gailhan
Key features
This 230V to 400V single phase transformer steps the 230 V mains — formerly 220 V — up to 400 volts single-phase AC, isolated from the supply: to power a machine or device designed for 400 V across two wires, where only 230 V is available. It does not create three-phase. The primary and secondary are two separate windings. From 63 VA to 20 kVA, open frame (IP00), with a ventilated cover (IP23) or in a sealed housing (IP54): it is wound and tested in our workshop in Gailhan, in the Gard (southern France).
It delivers 400 V across two wires, single-phase. A three-phase motor or machine needs a phase converter, which this transformer does not replace: tell us about your machine.
From 400 V to single-phase 230 V: the 400 V / 230 V transformer; from a heavily loaded three-phase supply, the three-phase to single-phase transformer.
That is normal: about 424 V off load on the 63 VA, 412 V on the 1,000 VA. The voltage falls to 400 V at full load.
When should you use a 230V to 400V single phase transformer?
- Single-phase machines and equipment designed for 400 V, on a site that only has 230 V.
- Replacing a 220 V / 380 V transformer in an existing installation.
- Test benches and equipment that need 400 V isolated from the mains.
It works on 50 and 60 Hz supplies and delivers single-phase 400 V: it does not produce three-phase.
Specifications of the 230 V / 400 V single-phase transformer
Values for the selected configuration: 63 VA · IP00.
- Voltage
- 230 V AC (formerly 220 V)
- Rated current
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- Terminals
- 1 (0 V) · 2 (230 V) · earth
- Recommended protection
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- On-load voltage
- 400 V AC
- No-load voltage
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- Rated current
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- Terminals
- 3 (0 V) · 4 (400 V)
- Recommended protection
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- Type
- Dry-type transformer, two separate windings
- Core
- EI laminations, flux density 1.2 T
- Insulation class
- H (180 °C)
- Temperature rise
- 50 °C, 40 °C maximum ambient
- Standards
- EN 61558-2-4 (isolating transformers)
- Electrostatic shield
- Fitted as standard, earthed
- Thermal protection
- On request
- IP rating
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- Overall dimensions L × W × H
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- Weight
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- Mounting
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- Altitude
- 3,000 m maximum
- Connection
- Screw terminals up to 55 A (10 kVA on this model), lugs above
From 10 to 20 kVA, losses and efficiency are available on request.
Ratings and prices
From 63 VA to 20 kVA. Above that, or for another voltage, on request.
| Rating | 400 V current | Primary fuse | 400 V protection | No-load / load losses | Efficiency | Weight | Dimensions (mm) | Price ex VAT |
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| 63 VA | 0.2 A | aM 2 A | aM 2 A | 2 / 3.6 W | 90.5 % | 1.5 kg | 75 × 68 × 73 | €47.42 |
| 100 VA | 0.2 A | aM 2 A | aM 2 A | 3 / 5 W | 92.0 % | 2 kg | 84 × 82 × 78 | €57.42 |
| 160 VA | 0.4 A | aM 2 A | aM 2 A | 4 / 8.5 W | 92.5 % | 2.5 kg | 96 × 89 × 87 | €63.25 |
| 200 VA | 0.5 A | aM 2 A | aM 2 A | 5 / 8.8 W | 93.0 % | 2.6 kg | 118 × 97 × 97 | €66.58 |
| 250 VA | 0.6 A | aM 2 A | aM 2 A | 5 / 11.9 W | 93.2 % | 3.9 kg | 108 × 95 × 100 | €78.25 |
| 300 VA | 0.8 A | aM 2 A | aM 2 A | 6 / 14.6 W | 93.0 % | 4 kg | 108 × 103 × 94 | €80.75 |
| 400 VA | 1.0 A | aM 2 A | aM 2 A | 8 / 15.1 W | 94.2 % | 6 kg | 126 × 122 × 108 | €102.42 |
| 500 VA | 1.2 A | aM 4 A | aM 2 A | 9 / 15.2 W | 95.2 % | 6.8 kg | 126 × 110 × 115 | €112.42 |
| 630 VA | 1.6 A | aM 4 A | aM 2 A | 12 / 22.4 W | 94.6 % | 9 kg | 150 × 124 × 126 | €132.42 |
| 750 VA | 1.9 A | aM 4 A | aM 2 A | 15 / 24.3 W | 94.8 % | 10.3 kg | 150 × 120 × 135 | €144.92 |
| 1 kVA | 2.5 A | aM 6 A | aM 4 A | 18 / 28.4 W | 95.4 % | 14 kg | 150 × 144 × 127 | €175.75 |
| 1.6 kVA | 4.0 A | aM 8 A | aM 6 A | 19 / 46.4 W | 95.9 % | 16.4 kg | 180 × 140 × 160 | €219.92 |
| 2 kVA | 5.0 A | aM 10 A | aM 6 A | 19 / 58.5 W | 96.1 % | 20 kg | 180 × 160 × 160 | €243.25 |
| 2.5 kVA | 6.2 A | aM 12 A | aM 8 A | 24 / 66.8 W | 96.4 % | 24 kg | 180 × 180 × 150 | €250.75 |
| 3 kVA | 7.5 A | aM 16 A | aM 8 A | 29 / 128.2 W | 94.8 % | 29 kg | 180 × 200 × 160 | €288.25 |
| 4 kVA | 10.0 A | aM 20 A | aM 12 A | 42 / 103.3 W | 96.4 % | 33 kg | 240 × 190 × 220 | €425.75 |
| 5 kVA | 12.5 A | aM 25 A | aM 16 A | 45 / 121.2 W | 96.7 % | 36 kg | 240 × 200 × 220 | €458.25 |
| 6.3 kVA | 15.8 A | aM 32 A | aM 20 A | 56 / 130.1 W | 97.0 % | 40 kg | 240 × 210 × 220 | €483.25 |
| 7.5 kVA | 18.8 A | aM 40 A | aM 20 A | 56 / 154.8 W | 97.2 % | 46 kg | 240 × 230 × 220 | €548.25 |
| 10 kVA | 25.0 A | aM 50 A | aM 32 A | —* | —* | 75 kg | 390 × 150 × 470 | €1,012.42 |
| 15 kVA | 37.5 A | aM 80 A | aM 40 A | —* | —* | 80 kg | 390 × 160 × 470 | €1,145.75 |
| 20 kVA | 50.0 A | aM 100 A | aM 63 A | —* | —* | 95 kg | 390 × 170 × 470 | €1,279.92 |
aM fuses sized for the rated current; alternatively, a type D circuit breaker of the same rating. * 10 to 20 kVA: catalogue weights and dimensions, losses on request.
Connection and dimensions
Extracts from the datasheet: diagram, terminal block and dimensions.
PDF · specifications, ratings and part numbers, protection
Primary protection
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400 V protection
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As close as possible to the transformer, on the 400 V outgoing circuit.
Safety
- Connection with the power off, by a qualified person.
- Earth connected before switching on.
- IP00: inside a closed cabinet or enclosure.
Standards, warranty and options
A standard transformer, made in Gailhan and also available in other voltages.
Frequently asked questions
About the 230 V / 400 V single-phase transformer.
Does this 230V to 400V transformer supply three-phase?
No: it delivers single-phase 400 V, across two wires. A transformer cannot create the three phases: for a three-phase machine, you need a phase converter. Tell us what you need.
220V to 380V or 230V to 400V: what is the difference?
None: 220 V and 380 V are the former names for 230 V and 400 V. A 220V to 380V transformer and a 230V to 400V transformer are the same unit.
Which rating should I choose?
Add up the power of the equipment supplied at 400 V, multiply by 1.25 and take the next rating up: 2,000 W needs 2,500 VA; 4,000 W needs 5,000 VA. For a motor, allow a bigger margin.
Why do I measure more than 400 V?
Off load, the voltage is slightly higher: about 424 V on the 63 VA and 412 V on the 1,000 VA. It falls to 400 V when the transformer delivers its rated current.
How do I connect a 230V to 400V transformer?
The 230 V supply goes to terminals 1 (0 V) and 2 (230 V), and earth to the primary earth terminal; your 400 V equipment is fed from terminals 3 (0 V) and 4 (400 V). The connection diagram is on the datasheet.
What protection should I install?
On the primary, an aM fuse or a type D circuit breaker rated for the primary current: 2 A for the 63 VA, 6 A for the 1,000 VA. On the secondary, protection rated for the 400 V current: a 2 A aM fuse for the 63 VA, 4 A for the 1,000 VA. At switch-on, the transformer draws about twelve times its rated current; the protection rating for each size is given in the table.
And to go from 400 V to 230 V?
That calls for the 400 V / 230 V single-phase transformer, connected between two phases. For high power on a three-phase supply, the three-phase to single-phase transformer spreads the load.
IP00, IP23 or IP54: which should I choose?
IP00: open-frame transformer, to be installed in a cabinet or enclosure. IP23: ventilated cover, for a dry room. IP54: moulded housing up to 630 VA, sealed enclosure above that, protected against dust and splashing water. All about IP ratings.
Customer reviews
Reviews posted by customers who bought this transformer (in French).
Transformateur parfaitement fonctionnel. En charge sans souci depuis maintenant 6 mois à 80% de sa puissance nominale. Excellent produit professionnel. Délais, caractéristiques techniques, prix et livraison sans commune mesure avec la concurrence. A recommander ps : Le plus, fabrication française renouant avec les années "glorieuses" de l'industrie électronique française de jadis ... :-)
Other 230 V and 400 V transformers
The reverse direction, the three-phase to single-phase transformer and other voltages.