Three-phase isolation transformer 400V -> 400V +N
Three-phase transformer 3x400VAC 3x400VAC+N available in our store. Shipped from our company within 48h, French-made in the Gard region. For more details, please contact us (see our opening hours).
Three-phase transformer 400V -> 400V + N
Three-phase isolation transformer with cover, protection index IP23 – IK08, available in all power ratings according to your requirements.
100% French manufacturing 🇫🇷, made in our ABL Transfo workshops in Gailhan (30260), ensuring impeccable quality and full compliance with current standards. Every transformer leaving our workshop is 100% electrically tested.
- Input voltages: 3 x 400 VAC
- Output voltages: 3 x 400 VAC + N
- Covered finish IP23
- Primary wiring: Delta △
- Secondary wiring: Star ★ + N
- Available wirings: DYN11; YND; ZZYN (surcharge)
Functions and applications of our three-phase isolation transformer
This transformer is designed to electrically isolate an installation from the mains and/or generate a neutral point when it is not available.
It is especially suited for industrial, tertiary or automation installations requiring galvanic separation to improve safety and network reliability.
Thanks to their versatility and proven reliability, these three-phase isolation transformers are used in a wide range of industries.
They are used in industry as well as in environments that require high electrical stability or reinforced equipment protection.
The most common areas of application:
- Aerospace and aviation: secure power supply for test benches and ground equipment.
- Industry and production: protection for machine tools, automation, variable speed drives and production lines.
- Medical sector: isolation of sensitive equipment and maintaining current quality in critical environments.
- Automation and robotics: stable supply for PLCs, robots and control systems.
- Technical buildings and infrastructure: reducing electromagnetic disturbances in complex electrical networks.
And more generally, in any environment requiring galvanic separation, neutral generation, or improved power quality.
Technical advantages of the three-phase isolation transformer
- Reduction of harmonics and electromagnetic disturbances, for more stable equipment operation.
- Elimination of residual voltages on the neutral: in this case, the neutral must be imperatively grounded for optimum stability.
- Total galvanic isolation between primary and secondary, limiting the risk of backflow or disturbance.
- Robust and ventilated construction with IP23 IK08 metal cover, suited to demanding environments.
- Customisation possible: power, voltage, adjustment tap, mounting accessories or custom enclosure. Access the configurator >> Three-phase Transfo Creator
Ultra-fast shipping times for the three-phase range
- between 1 and 50 kVA: Ships within 3 days.
- between 50 and 100 kVA: Ships within 6 days
- over 100 kVA: between 4 and 5 weeks, please contact us in case of emergency
400V 400V + N transformer wiring
The standard wiring for our three-phase transformer 400 400 + N is DYN11 (delta primary, star + neutral secondary). Other wirings are possible according to your needs, please contact us for any wiring other than DYN11.
| Primary side | Secondary side |
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Table of three-phase models with dimensions and weights by power rating
Find below the table of weights and dimensions according to references and power ratings.
| Reference | Model | Weight | Dimensions |
|---|---|---|---|
| TTI400400N-1000-23 | 1000 vA (1kVA) | 25 kg | 340 x 240 x 370 mm |
| TTI400400N-2000-23 | 2000 vA (2kVA) | 32 kg | 340 x 240 x 370 mm |
| TTI400400N-2500-23 | 2500 vA (2.5kVA) | 36 kg | 340 x 240 x 370 mm |
| TTI400400N-3150-23 | 3150 vA (3.15kVA) | 38 kg | 340 x 240 x 370 mm |
| TTI400400N-4000-23 | 4000 vA (4kVA) | 43 kg | 340 x 240 x 370 mm |
| TTI400400N-5000-23 | 5000 vA (5kVA) | 46 kg | 340 x 240 x 370 mm |
| TTI400400N-6300-23 | 6300 vA (6.3kVA) | 60 kg | 460 x 300 x 470 mm |
| TTI400400N-8000-23 | 8000 vA (8kVA) | 79 kg | 460 x 300 x 470 mm |
| TTI400400N-10000-23 | 10 000 vA (10kVA) | 89 kg | 520 x 320 x 520 mm |
| TTI400400N-12500-23 | 12 500 vA (12.5kVA) | 94 kg | 520 x 320 x 520 mm |
| TTI400400N-16000-23 | 16 000 vA (16kVA) | 104 kg | 520 x 320 x 520 mm |
| TTI400400N-20000-23 | 20 000 vA (20kVA) | 124 kg | 520 x 320 x 520 mm |
| TTI400400N-25000-23 | 25 000 vA (25kVA) | 169 kg | 520 x 320 x 520 mm |
| TTI400400N-30000-23 | 30 000 vA (30kVA) | 190 kg | 520 x 320 x 520 mm |
| TTI400400N-40000-23 | 40 000 vA (40kVA) | 205 kg | 520 x 320 x 520 mm |
| TTI400400N-50000-23 | 50 000 vA (50kVA) | 275 kg | 715 x 710 x 790 mm |
| TTI400400N-63000-23 | 63 000 vA (63kVA) | 220 kg | 715 x 510 x 790 mm |
| TTI400400N-80000-23 | 80 000 vA (80kVA) | 300 kg | 715 x 510 x 790 mm |
| TTI400400N-100000-23 | 100 000 vA (100kVA) | 345 kg | 715 x 510 x 790 mm |
| TTI400400N-125000-23 | 125 000 vA (125kVA) | 360 kg | 795 x 525 x 890 mm |
| TTI400400N-160000-23 | 160 000 vA (160kVA) | 480 kg | 910 x 660 x 970 mm |
5 reviews for Three-phase isolation transformer 400V -> 400V +N
Three-phase isolation transformer 400V -> 400V +N 
Livraison rapide, produit conforme et bien emballé. Installation sans difficulté, parfait pour créer un neutre. Le service téléphonique est top, fabrication française en plus. Je recommande sans hésiter.
Produit reçu rapidement, très bien emballé. Fonctionne parfaitement sur notre installation industrielle. Fabrication sérieuse, rien à signaler après plusieurs semaines d’utilisation. Content d’acheter français.
Produit conforme à la description, fabrication robuste et délai respecté. Service client à l’écoute, installation réalisée sans souci. Très satisfait de la qualité, matériel professionnel, rien à dire de plus.
J’ai commandé ce transformateur d’isolation en 10kVa pour alimenter une machine triphasée avec un convertisseur de phase.
Sans transformateur d’isolation, le différentiel 500mA sautait dès la mise sous tension (probablement bruit HF induisant des fuites à la terre par les capa de filtrage), avec le transformateur d’isolation (mais la terre bien branchée partout !) plus aucun problème, même le différentiel 30mA ne bouge pas. Donc plus que satisfait.
A savoir, une fois le couvercle enlevé, il y a des anneaux de levage pour manutentionner le transformateur (parce que ça pèse son poids, quand même 😉 ).
Bonjour MR LEGRAND,
Toute notre équipe vous remercie d’avoir pris de votre temps pour nous faire un retour.
Nous sommes ravis d’avoir pu résoudre vos problèmes et restons à votre disposition.
Excellente journée et meilleures salutations,
S LANCRY
Bonjour MR LEGRAND,
Toute notre équipe vous remercie d’avoir pris de votre temps pour nous faire un retour.
Nous sommes ravis d’avoir pu résoudre vos problèmes et restons à votre disposition.
Excellente journée et meilleures salutations,
S LANCRY