Custom Three-phase Transformer
Custom three-phase transformer, configurable directly through the configurator below.
For further assistance, please contact us by email or phone.
Custom-made Three-Phase Transformer — ABL Transfo
The custom-made three-phase transformer for all your industrial applications
Primary voltage, secondary voltage, power, coupling, winding — your custom-made three-phase transformer is fully configured to your specifications. Manufactured in France, delivered in IP21 enclosure.
1→200
kVA available
IP54
max rating available
Cu/Al
winding choice
🇫🇷
made in France
What is a custom-made three-phase transformer?
A custom-made three-phase transformer is an electrical transformer with three primary and three secondary windings, designed to precisely adapt to the needs of an industrial installation. It allows adapting the voltage of a three-phase network — whether 400V, 690V or any other value — to the voltage required by a machine or equipment.
The custom-made version goes further: you define the primary voltage, secondary voltage, power, coupling (Dyn11, Dd11, Ynd11 or Ynyn11), winding (copper or aluminium) and protection rating. ABL Transfo then manufactures your custom three-phase transformer in its French workshops.
Delivered in IP21 enclosure, with connections on terminal block. It does not convert three-phase to single-phase — for this, see our tri/mono range.
⚡ Which coupling for your custom three-phase transformer?
The coupling defines how the primary and secondary windings are interconnected. It determines the phase shift and whether a neutral is available on the secondary side.
Dyn11 — Delta/Star+Neutral
The most common in Europe. Primary in delta (400V), secondary in star with neutral. Ideal for mixed mono/three-phase loads.
Dd11 — Delta/Delta
No secondary neutral. Used for pure three-phase loads (motors, industrial furnaces). Robust against load imbalances.
Ynd11 — Star+N/Delta
Primary in star with neutral (HTA network), secondary in delta. Typical for HTA/LV distribution.
Ynyn11 — Star+N/Star+N
Neutral available on both sides. For distribution systems where neutral is needed at input and output.
Configure your custom-made three-phase transformer directly on this page
All options are set in the configuration form above before adding to cart. Full detail of each parameter:
⚡ From 1 kVA to 200 kVA
22 standard power ratings. Above 200 kVA, contact us.
🔄 Copper or Aluminium
Copper: better efficiency, more compact, longer service life.
Aluminium: more economical purchase price.
🔌 Primary & Secondary
Enter the line voltage in V (e.g.: 400 for a 3×400V network). Standard European grid: 3×400V.
🔗 Dyn11 / Dd11 / Ynd11 / Ynyn11
See the coupling guide in the description. Dyn11 = European industry standard.
🛡️ IP00, IP23 or IP54
IP00: dry technical room. IP23: dust protection. IP54: water projection protection from all directions.
⚡ Upstream and/or Downstream
Primary (upstream) and/or secondary (downstream) circuit breaker protection.
🎚️ Voltage adjustment
Allow correction of output voltage for unstable grids.
➕ Castors, isolator, ventilation, lifting rings
Castors (+100€), Isolator (+15€), Forced ventilation (+150€), Lifting rings (+20€). Can be combined.
Power + Winding
Select from configurator.
Voltages
Enter primary and secondary.
Options
IP, breakers, coupling, taps.
Add to cart
Note constraints if needed.
🔧 Technical specifications
| Paramètre | Valeur |
|---|---|
| Primary voltages | Custom — any three-phase voltage (e.g.: 3×400V, 3×690V) |
| Secondary voltages | Custom — any three-phase voltage (e.g.: 3×230V, 3×400V, 3×208V) |
| Standard powers | 1 · 1.6 · 2 · 2.5 · 3 · 4 · 5 · 6.3 · 8 · 10 · 12.5 · 16 · 20 · 25 · 31.5 · 40 · 50 · 63 · 80 · 100 · 125 · 160 · 200 kVA |
| Winding | Copper (standard) or Aluminium |
| Coupling | Dyn11 · Dd11 · Ynd11 · Ynyn11 |
| Protection rating | IP00 · IP23 (+110€) · IP54 (+230€) |
| Circuit breakers | Upstream and/or Downstream — optional |
| Adjustment taps | None · ±5% · ±10% |
| Additional options | Castors · Isolator · Forced ventilation · Lifting rings |
| Standard finish | IP21 enclosure |
| Connections | Terminal block |
| Winding wire | Round enamelled copper or aluminium wire, Grade II Class H |
| Magnetic laminations | Low-loss (1W7 or 0W6 depending on power) |
| Service | Continuous S1 |
| Quality control | Rigorous end-of-line testing |
| Compliance | RoHS · EN 61558 · Made in France |
📐 Standard references — Custom-made three-phase transformer
Dimensions L×W×H in mm. Indicative values — may vary depending on options.
| Ref. | Power | Dim. L×W×H (mm) | kg |
|---|---|---|---|
| TTP030 | 300 VA | 280 × 175 × 320 | 11 |
| TTP063 | 630 VA | 280 × 175 × 320 | 13 |
| TTP075 | 750 VA | 280 × 175 × 320 | 14 |
| TTP1 | 1 kVA | 340 × 240 × 370 | 25 |
| TTP2 | 2 kVA | 340 × 240 × 370 | 32 |
| TTP3 | 3 kVA | 340 × 240 × 370 | 38 |
| TTP5 | 5 kVA | 340 × 240 × 370 | 46 |
| TTP6.3 | 6,3 kVA | 400 × 240 × 420 | 60 |
| TTP10 | 10 kVA | 400 × 240 × 420 | 89 |
| TTP16 | 16 kVA | 520 × 320 × 520 | 104 |
| TTP20 | 20 kVA | 520 × 320 × 520 | 124 |
Frequently asked questions about the custom-made three-phase transformer
What is a custom-made three-phase transformer?
A custom-made three-phase transformer adapts the voltage of a three-phase network to the voltage required by a machine or installation. It is "custom-made" because its parameters — primary voltage, secondary voltage, power, coupling — are defined to your exact needs, unlike standard fixed-voltage models.
What is the difference between Dyn11 and Dd11 coupling?
Dyn11 (delta/star+neutral) is the European standard: it provides a neutral on the secondary side, allowing both mono and three-phase loads to be fed. Dd11 (delta/delta) has no secondary neutral — reserved for pure three-phase loads (motors, furnaces). If in doubt, choose Dyn11.
Copper or aluminium winding for my custom three-phase transformer?
Copper winding offers better efficiency, smaller size and longer service life — recommended for continuous industrial use. Aluminium winding is more economical and suitable for less demanding applications.
Can a custom three-phase transformer convert three-phase to single-phase?
No. A custom three-phase transformer adapts voltage between two three-phase networks. For three-phase to single-phase conversion, see our tri/mono transformers.
What is the lead time for a custom-made three-phase transformer?
4 days to 2 weeks for powers up to 100 kVA, and 4 to 5 weeks above 100 kVA. Made to order — no returns or exchanges once in production.
How do I choose the power of my three-phase transformer?
Take the total consumed power in kVA (or convert: P(kVA) = P(kW) / cos φ, with cos φ ≈ 0.8 for motors). Add 20 to 30% margin for start-up peaks. If in doubt, contact our team for free sizing.
Need help configuring your custom-made three-phase transformer?
Our team sizes and validates your configuration free of charge within 24h.
Custom Three-phase Transformer 
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