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Delta inverters use the standard naming convention:
VFD-[Power Code][Code de série][Code de tension][Special Function Code].
Some new models (such as the MS300 series) adopt a more detailed extended naming format.
The following provides a comprehensive explanation from four aspects: general structure, meaning of each part, typical series examples, and special function codes.
- General Model Structure (Exemple: VFD007E23A)
| Position | Code | Signification | Example Description |
| 1–3 | VFD | Product Identifier | Entraînement à fréquence variable. All Delta inverters start with this. |
| 4–6 | 7 | Code de puissance nominale | Represents 0.75 kW (750 W). Different codes correspond to different power ratings. |
| 7 | E | Code de série | Indicates VFD‑E series (low‑power inverter with built‑in PLC). |
| 8–9 | 23 | Tension & Code de phase | “2” = 200–240 V, “3” = 3‑phase input. |
| 10 | UN | Special Function Code | Standard version with built‑in EMI filter. |
- Detailed Breakdown of Each Part
2.1 Power Code vs. Puissance nominale (kW)
| Power Code | Puissance nominale | Power Code | Puissance nominale | Power Code | Puissance nominale |
| 2 | 0.2 | 15 | 1.5 | 75 | 7.5 |
| 4 | 0.4 | 22 | 2.2 | 110 | 11 |
| 7 | 0.75 | 37 | 3.7 | 150 | 15 |
| 10 | 1 | 55 | 5.5 | 220 | 22 |
Note: Some high‑power models use actual power directly, par ex., VFD110B43A = 110 kW.
2.2 Code de série & Caractéristiques
| Code de série | Series Name | Principales fonctionnalités | Applications typiques |
| M. | VFD‑M | Low noise, taille compacte | Petites machines, conditionnement, convoyeurs |
| E | VFD‑E | Built‑in PLC | Lignes de production automatisées |
| B | VFD‑B | Sensorless vector control, high torque | Ventilateurs, pompes, compresseurs, grues |
| F | VFD‑F | For fans & pompes, built‑in PID | CVC, cooling towers, water supply |
| MS | MS300 | Compact high‑performance general‑purpose | Small automation, replaces VFD‑M |
| MH | MH300 | High‑performance vector, servo‑grade | Positionnement, contrôle de la tension, sync motors |
| CP2000 | VFD‑CP2000 | Vecteur sans capteur, high overload | General industrial machinery |
| ED | VFD‑ED | Dedicated for elevators | Passenger & monte-charges, escaliers mécaniques |
2.3 Tension & Code de phase
| Code | Puissance d'entrée | Sortir | Application Region |
| 21 | 1‑phase 200–240 V | 3‑phase 0–240 V | Home/small equipment, Asia/NA |
| 23 | 3‑phase 200–240 V | 3‑phase 0–240 V | Industriel, Asia/NA |
| 43 | 3‑phase 380–460 V | 3‑phase 0–460 V | Industriel, mondial |
| 53 | 3‑phase 525–600 V | 3‑phase 0–600 V | High‑voltage industrial |
2.4 Special Function Suffix Codes
| Letter | Signification | Letter | Signification | Letter | Signification |
| UN | With EMI filter, standard | B | With braking unit | N | Sans filtre CEM |
| S | Built‑in STO | H | Enhanced heat dissipation | P. | Higher protection |
| ‑21 | Special version | ‑00 | Version standard | ‑EA | Energy‑saving for fans/pumps |
- New Extended Format (Exemple: VFD1A5MS43ANSHA, MS300)
| Position | Code | Signification | Description |
| 1–3 | VFD | Inverter identifier | Standard prefix |
| 4–6 | 1A5 | Courant de sortie nominal | 1.5 UN (≈ 0.75 kW) |
| 7–8 | MS | Code de série | MS300 series |
| 9–10 | 43 | Code de tension | 460 V 3‑phase input |
| 11 | UN | IP rating | IP20 |
| 12 | N | EMC configuration | Sans filtre CEM |
| 13 | S | Fonction de sécurité | Built‑in STO |
| 14 | S | Refroidissement | Standard cooling |
| 15–16 | AA | Special options | Configuration standard |
- Exemples de modèles complets
Exemple 1: VFD007E23A
VFD: Onduleur
007: 0.75 kW
E: E series (built‑in PLC)
23: 3‑phase 200–240 V input
UN: Standard with EMI filter
Exemple 2: VFD110B43A
VFD: Onduleur
110: 110 kW
B: B series (vecteur sans capteur)
43: 3‑phase 380–460 V input
UN: Standard with EMI filter
Exemple 3: VFD1A5MS43ANSHA
VFD: Onduleur
1A5: 1.5 A output (≈ 0.75 kW)
MS: MS300 series
43: 460 V 3‑phase input
UN: IP20
N: No EMC filter
S: STO
S: Standard cooling
AA: Version standard
- Sélection & Identification Tips
- Correspondance de puissance: Select according to motor rated power; inverter ≥ 1.1× motor power recommended.
- Compatibilité de tension: Confirm input phase and voltage (21/23/43, etc.).
- Series function: Choose by application (F for fans/pumps, E for PLC).
- Exigences particulières: Select protection, CEM, and safety functions as needed.
- Backward compatibility: New models (par ex., MS300) replace older ones.
- Quick Identification Mnemonic
Start with VFD,
Numbers show power,
Letters show series,
Two digits show voltage,
Suffix shows features.
With the above explanation, you can easily identify the power, série, tension, and functions of any Delta inverter model for accurate selection, achat, et entretien.
