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Delta inverters use the standard naming convention:
VFD-[Power Code][Series Code][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 (例: VFD007E23A)
| 位置 | コード | 意味 | 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 | Series Code | Indicates VFD‑E series (low‑power inverter with built‑in PLC). |
| 8–9 | 23 | Voltage & Phase Code | “2” = 200–240 V, “3” = 3‑phase input. |
| 10 | あ | Special Function Code | Standard version with built‑in EMI filter. |
- Detailed Breakdown of Each Part
2.1 Power Code vs. Rated Power (kW)
| Power Code | Rated Power | Power Code | Rated Power | Power Code | Rated Power |
| 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 |
注記: Some high‑power models use actual power directly, 例えば, VFD110B43A = 110 kW.
2.2 Series Code & 特徴
| Series Code | Series Name | 主な特長 | 代表的な用途 |
| M | VFD‑M | 低騒音, コンパクトなサイズ | Small machinery, packaging, conveyors |
| E | VFD‑E | Built‑in PLC | Automated production lines |
| B | VFD‑B | Sensorless vector control, high torque | ファン, パンプス, コンプレッサー, クレーン |
| F | VFD‑F | For fans & パンプス, built‑in PID | 空調設備, cooling towers, water supply |
| MS | MS300 | Compact high‑performance general‑purpose | Small automation, replaces VFD‑M |
| MH | MH300 | High‑performance vector, servo‑grade | 位置決め, tension control, sync motors |
| CP2000 | VFD‑CP2000 | Sensorless vector, high overload | General industrial machinery |
| ED | VFD‑ED | Dedicated for elevators | Passenger & freight elevators, escalators |
2.3 Voltage & Phase Code
| コード | 入力電力 | 出力 | 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, グローバル |
| 53 | 3‑phase 525–600 V | 3‑phase 0–600 V | High‑voltage industrial |
2.4 Special Function Suffix Codes
| Letter | 意味 | Letter | 意味 | Letter | 意味 |
| あ | With EMI filter, 標準 | B | With braking unit | N | Without EMC filter |
| S | Built‑in STO | H | Enhanced heat dissipation | P | Higher protection |
| ‑21 | 特別バージョン | ‑00 | 標準バージョン | ‑EA | Energy‑saving for fans/pumps |
- New Extended Format (例: VFD1A5MS43ANSHA, MS300)
| 位置 | コード | 意味 | 説明 |
| 1–3 | VFD | Inverter identifier | Standard prefix |
| 4–6 | 1A5 | Rated output current | 1.5 あ (≈ 0.75 kW) |
| 7–8 | MS | シリーズコード | MS300 series |
| 9–10 | 43 | Voltage code | 460 V 3‑phase input |
| 11 | あ | IP rating | IP20 |
| 12 | N | EMC configuration | Without EMC filter |
| 13 | S | Safety function | Built‑in STO |
| 14 | S | 冷却 | Standard cooling |
| 15–16 | AA | Special options | 標準構成 |
- Complete Model Examples
例 1: VFD007E23A
VFD: インバータ
007: 0.75 kW
E: E series (built‑in PLC)
23: 3‑phase 200–240 V input
あ: Standard with EMI filter
例 2: VFD110B43A
VFD: インバータ
110: 110 kW
B: B series (sensorless vector)
43: 3‑phase 380–460 V input
あ: Standard with EMI filter
例 3: VFD1A5MS43ANSHA
VFD: インバータ
1A5: 1.5 A output (≈ 0.75 kW)
MS: MS300 series
43: 460 V 3‑phase input
あ: IP20
N: No EMC filter
S: STO
S: Standard cooling
AA: 標準バージョン
- 選択 & Identification Tips
- パワーマッチング: Select according to motor rated power; inverter ≥ 1.1× motor power recommended.
- Voltage compatibility: Confirm input phase and voltage (21/23/43, 等).
- 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 (例えば, 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, シリーズ, 電圧, and functions of any Delta inverter model for accurate selection, purchasing, and maintenance.
