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Delta inverters use the standard naming convention:
VFD-[Power Code][Cod de serie][Voltage Code][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 (Exemplu: VFD007E23A)
| Poziţie | Cod | Sens | Example Description |
| 1–3 | VFD | Product Identifier | Variable Frequency Drive. All Delta inverters start with this. |
| 4–6 | 7 | Rated Power Code | Represents 0.75 kW (750 W). Different codes correspond to different power ratings. |
| 7 | E | Cod de serie | Indicates VFD‑E series (low‑power inverter with built‑in PLC). |
| 8–9 | 23 | Voltaj & Phase Code | “2” = 200–240 V, “3” = 3‑phase input. |
| 10 | O | Special Function Code | Standard version with built‑in EMI filter. |
- Detailed Breakdown of Each Part
2.1 Power Code vs. Putere nominală (kW)
| Power Code | Putere nominală | Power Code | Putere nominală | Power Code | Putere nominală |
| 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 |
Nota: Some high‑power models use actual power directly, de ex., VFD110B43A = 110 kW.
2.2 Cod de serie & Caracteristici
| Cod de serie | Series Name | Caracteristici cheie | Aplicații tipice |
| M | VFD‑M | Low noise, dimensiune compactă | Small machinery, packaging, transportoare |
| E | VFD‑E | Built‑in PLC | Automated production lines |
| B | VFD‑B | Sensorless vector control, high torque | Fani, pompe, compresoare, macarale |
| F | VFD‑F | For fans & pompe, built‑in PID | HVAC, cooling towers, water supply |
| MS | MS300 | Compact high‑performance general‑purpose | Small automation, replaces VFD‑M |
| MH | MH300 | High‑performance vector, servo‑grade | Poziționare, tension control, sync motors |
| CP2000 | VFD‑CP2000 | Sensorless vector, suprasarcină mare | General industrial machinery |
| ED | VFD‑ED | Dedicated for elevators | Passenger & freight elevators, scările rulante |
2.3 Voltaj & Phase Code
| Cod | Putere de intrare | Ieșire | 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 | Industrial, Asia/NA |
| 43 | 3‑phase 380–460 V | 3‑phase 0–460 V | Industrial, globală |
| 53 | 3‑phase 525–600 V | 3‑phase 0–600 V | High‑voltage industrial |
2.4 Special Function Suffix Codes
| Letter | Sens | Letter | Sens | Letter | Sens |
| O | With EMI filter, standard | B | With braking unit | N | Fara filtru EMC |
| S | Built‑in STO | H | Enhanced heat dissipation | P | Higher protection |
| ‑21 | Special version | ‑00 | Standard version | ‑EA | Energy‑saving for fans/pumps |
- New Extended Format (Exemplu: VFD1A5MS43ANSHA, MS300)
| Poziţie | Cod | Sens | Descriere |
| 1–3 | VFD | Inverter identifier | Standard prefix |
| 4–6 | 1A5 | Curent nominal de ieșire | 1.5 O (≈ 0.75 kW) |
| 7–8 | MS | Cod de serie | MS300 series |
| 9–10 | 43 | Voltage code | 460 V 3‑phase input |
| 11 | O | IP rating | IP20 |
| 12 | N | EMC configuration | Fara filtru EMC |
| 13 | S | Funcția de siguranță | Built‑in STO |
| 14 | S | Cooling | Standard cooling |
| 15–16 | AA | Special options | Configurație standard |
- Complete Model Examples
Exemplu 1: VFD007E23A
VFD: Invertor
007: 0.75 kW
E: E series (built‑in PLC)
23: 3‑phase 200–240 V input
O: Standard with EMI filter
Exemplu 2: VFD110B43A
VFD: Invertor
110: 110 kW
B: B series (sensorless vector)
43: 3‑phase 380–460 V input
O: Standard with EMI filter
Exemplu 3: VFD1A5MS43ANSHA
VFD: Invertor
1A5: 1.5 A output (≈ 0.75 kW)
MS: MS300 series
43: 460 V 3‑phase input
O: IP20
N: No EMC filter
S: STO
S: Standard cooling
AA: Standard version
- Selecţie & Identification Tips
- Potrivirea puterii: Select according to motor rated power; inverter ≥ 1.1× motor power recommended.
- Voltage compatibility: Confirm input phase and voltage (21/23/43, etc.).
- Series function: Choose by application (F for fans/pumps, E for PLC).
- Special requirements: Select protection, EMC, and safety functions as needed.
- Backward compatibility: New models (de 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, serie, Voltaj, and functions of any Delta inverter model for accurate selection, purchasing, and maintenance.
