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| Parte del modelo | Significado | Explicación detallada |
| VFD | Delta Inverter Identifier | Abbreviation for Variable Frequency Drive, the universal prefix for Delta’s industrial automation inverters. |
| 55 | Potencia del motor aplicable | For 5.5kW (7.5caballos de fuerza) motores; this is the rated output power of the drive. |
| do | Código de serie | C2000/C2000+ Series – Delta high-performance general-purpose vector inverter, supporting induction motors and permanent magnet synchronous motors. |
| 43 | Clase de voltaje & Fase | 4 = 3-phase 400V class (380~480V); 3 = 3-phase input (vs. 1 para monofásico). |
| A | Modo de control & Características | Supports Vector Control (FOC), Control de par (TRQ), high-performance algorithm, 200% starting torque at 0.5Hz. |
| -21 | Versión & Configuración | Versión estándar: built-in braking unit (selected power ratings), no built-in EMC filter (external available), compliant with international standards. |
- Especificaciones técnicas básicas (Oficial 2026 Data)
| Categoría | Artículo | Valor | Notas |
| Basic Specs | Potencia nominal | 5.5kilovatios (7.5caballos de fuerza) | For 5.5kW 3-phase induction motors |
| Voltaje de entrada | 3-phase 380~480V (+10%/-20%) | 47~63Hz, amplio rango de voltaje | |
| Corriente de salida nominal | 12A (heavy duty) / 10.8A (trabajo ligero) | Continuous operation in heavy-duty mode | |
| Rango de frecuencia de salida | 0.1~600Hz | For both low‑ and high‑speed applications | |
| Controlar el rendimiento | Modo de control | Sensorless Vector, Closed-loop Vector, Control V/F | Switchable closed/open loop |
| Par inicial | 200% par nominal a 0,5 Hz | Ideal for heavy starting loads | |
| Capacidad de sobrecarga | 150% for 60s; 200% for 3s | For shock loads | |
| Speed Accuracy | ±0,5% (open-loop) / ±0,02% (closed-loop) | High precision speed control | |
| Tiempo de respuesta de par | ≤10ms | Fast dynamic response | |
| Hardware | Grado de protección | IP20 (cabinet mount) | Seguro para los dedos; clean environment recommended |
| Enfriamiento | Forced air (removable fan) | Fácil mantenimiento, larga vida útil | |
| Funciones integradas | Braking unit (≤7,5kW), SOCIEDAD ANÓNIMA (5,000 pasos) | High integration, fewer external parts | |
| Comunicación | RS-485 (Modbus RTU) estándar | PROFINET/EtherNet/IP/CANopen optional | |
| Ambiente | Temperatura de funcionamiento | -10~40°C (derate 40~50°C) | Reducir 1% per °C above 40°C |
| Storage Temp | -20~60°C | Avoid moisture & corrosive gas | |
| Humedad | 5~95% (sin condensación) | Suitable for industrial environments |
III. Características principales & Ventajas
3.1 High‑Performance Control
Control de vectores: Precise independent torque & speed control for complex loads.
Built-in PLC: 5,000-step logic programming for simple automation, reducing external PLC dependency.
Auto energy saving: Dynamically adjusts output voltage; saves 20~50% at light load.
Motor auto-tuning: Completes matching in <10s, simplifies commissioning.
3.2 Diseño de alta confiabilidad
Estructura modular: Hot-swappable keypad, expandable I/O and communication cards for easy maintenance.
Protección total: sobrecorriente, sobretensión, subtensión, sobrecalentar, sobrecarga, pérdida de fase, falla a tierra, etc..
Safe stop: Supports STO (Desconexión de par segura), SIL 2 certificado.
Wide grid tolerance: Withstands ±15% voltage fluctuation for harsh grids.
3.3 Comunicación flexible & Expansión
Standard RS-485 Modbus RTU for multi-drive network control.
Optional modules: PROFINET, Ethernet/IP, PROFIBUS-DP, CANabierto.
Compatible with Siemens, mitsubishi, Rockwell PLCs via standard telegrams and process objects.
Monitoreo remoto & diagnostics via Delta DIAStudio or TIA Portal.
- Aplicaciones & Consejos de selección
4.1 Aplicaciones recomendadas
| Industria | Aplicaciones típicas | Características |
| Maquinaria general | Zapatillas, fans, compresores, mezcladores | Ahorro de energía, stable operation, longer equipment life |
| Manejo de materiales | Transportadores, grúas, polipastos, máquinas de embalaje | High precision speed control, heavy start, quick stop |
| Metal Processing | Tornos, milling, grinding, punching machines | High response, precise positioning, control de par |
| Textile & Dyeing | Textile machines, dyeing machines, stenter frames | Constant tension, synchronous operation, wide speed range |
| Plástico & Rubber | Injection molding, extrusion, blow molding | Significant energy saving (20~60%), stable pressure control |
4.2 Puntos clave de selección
- Power matching: Use VFD055C43A-21 for 5.5kW motors; avoid undersizing.
- Tipo de carga:
Constant torque (transportadores, mezcladores): use heavy-duty mode (12A).
Variable torque (fans, zapatillas): light-duty mode (10.8A) for better efficiency.
- Control requirements:
Posicionamiento de alta precisión: use encoder (PG card) closed-loop vector.
Network control: add communication module (p.ej., PROFINET).
- Ambiente:
Temperatura alta: extra cooling or derating required.
Dusty environment: dust cover + regular fan cleaning.
- Modelos de reemplazo & Ruta de actualización
5.3 Sugerencias de actualización
- Basic upgrade: VFD‑M/GD10 → C2000+ for better precision & funciones.
- Communication upgrade: Add PROFINET card for Industry 4.0 connectivity.
- System upgrade: Combine with Delta PLC (Serie DVP) & HMI for full automation solution.
Buying Notes
- Confirm suffix -21 (versión estándar), avoid old versions (p.ej., -00).
- Verify power & actual: 5.5kW → 12A rated.
- Buy from authorized Delta channels for genuine product & service.
- Order accessories as needed: tarjeta de comunicacion, keypad, resistencia de frenado.
VII. Instalación & Mantenimiento
7.1 Reglas de instalación
- Montaje: Wall/cabinet mount, instalación vertical; ≥150mm clearance top & bottom for ventilation.
- Alambrado:
Separate power & control cables to avoid interference.
Shielded cable for signals, single‑end grounding.
Braking resistor matched to power (≤7.5kW internal; external ≈100Ω/500W).
- Toma de tierra: Ground resistance ≤4Ω for safety & noise immunity.
Delta VFD055C43A-21 is a high‑performance 5.5kW vector inverter from the C2000+ series, featuring high precision, fiabilidad, and expandability for diverse industrial applications. With built-in PLC, wide voltage tolerance, and complete protection, it is an excellent choice for general industrial drive solutions. Select based on motor power, tipo de carga, control requirements, and environment for optimal performance and cost-effectiveness.
Complete Replacement Guide for Delta VFD055C43A-21
- Delta Internal Replacements (C2000+ Series, Seamless Compatibility)
1.1 Direct Same‑Series Replacements
| Código de falla | Causa | Solución |
| jefe | sobrecorriente | Check motor short, sobrecarga, acceleration time |
| VO | Sobretensión | Check mains voltage, deceleration time, resistencia de frenado |
| ultravioleta | Subtensión | Check input phase, Voltaje, cable size |
| OH | Overheat | Check fan, ventilación, temperatura ambiente |
| PH | Phase loss | Check input/output wiring, motor winding |
1.2 Near‑Power Replacements
| Modelo | Fuerza | Corriente nominal | Características clave | Solicitud |
| VFD055C43A-21 (Original) | 5.5kilovatios | 12A / 10.8A | C2000+, vector, built-in brake, RS-485 | Industria general |
| VFD055C43A-21 (Actualizado) | 5.5kilovatios | 12A | Better cooling, 10,000-step PLC, more protocols | New projects |
| VFD055CH43A-21 | 5.5kilovatios | 12A | CH2000, fan/pump specialized | aficionados, zapatillas |
| VFD055CP43B-21 | 5.5kilovatios | 12A | CP2000, hoist/crane dedicated | Cranes, polipastos |
- Global Brand Replacements (5.5kilovatios / 400V Vector)
2.1 Premium Brands
| Marca | Modelo | Serie | Control | Ventaja |
| siemens | 6SL3210-1KE21-3UF1 (G120C PN) | SINAMICS G120C | Vector/V/F | PROFINET, filtro CEM |
| mitsubishi | FR-A840-00720-2-60 | FREQROL A840 | Vector | High response, built-in PLC |
| Yaskawa | CIMR-AB4A0018FBA | A1000 | Vector | Bajo nivel de ruido, estable |
| Schneider | ATV320U75N4 | Altívar 320 | Vector/V/F | Compacto, multi-protocol |
| TEJIDO | ACS550-01-012A-4 | ACS550 | DTC | High torque accuracy |
2.2 Cost‑Effective Brands
| Marca | Modelo | Serie | Control | Ventaja |
| Innovación | MD280NT5.5GB | MD280 | Vector | PROFINET supported |
| Veichi | AC70-T3-055G | AC70 | Vector | Full-featured, bajo costo |
| INVT | CHF100A-5R5G/7R5P-4 | 100 francos suizos | Vector | Built-in brake un |
III. Critical Replacement Rules (Must Follow)
- Fuerza & actual: Rated power ≥5.5kW, current ≥12A (heavy duty).
- Voltaje: 400clase V (380~480V) only; do NOT use 200V directly.
- Control: Prefer vector control for matching dynamics.
- Sobrecarga: At least 150% for 60s.
- Comunicación: RS-485 standard; PROFINET/EtherNet/IP optional.
Mechanical Compatibility
Dimensiones: ~90×180×150mm – use same or smaller size.
Enfriamiento: Forced air – keep airflow direction.
Unidad de freno: Internal for ≤7.5kW; match external if needed.
Keypad: Use Delta standard keypad or compatible.
Best Replacement by Application
Maquinaria general: VFD055C43A-21 upgraded or Siemens G120C PN.
aficionados & zapatillas: VFD055CH43A-21 or Schneider ATV320U75N4.
Cranes/hoists: VFD055CP43B-21 or Mitsubishi FR-A840.
Budget projects: Inovance MD280NT5.5GB or Veichi AC70-T3-055G.
- Upgrade Paths
4.1 Delta Internal Upgrade
- C2000 → C2000+ (actuación & function improvement).
- Add PROFINET module (VFD-CM-PN01) for industrial networking.
- Pair with Delta PLC + HMI for full automation system.
4.2 Cross‑Brand Upgrade
- Comunicación: RS-485 → PROFINET / Ethernet/IP.
- Control: Open-loop vector → closed-loop vector with encoder.
- Seguridad: Choose models with STO (SIL 2).
The Delta VFD055C43A-21 has a wide range of replacements.
Same‑brand (C2000+ upgraded) offers seamless compatibility.
Cross‑brand (Siemens G120C PN, Mitsubishi FR-A840) provides higher performance.
Always follow core parameter matching to ensure stable, reliable replacement without performance loss or equipment damage.
