VFD17AMS43ANSAA New Original Delta MS300 Series Variable Frequency Drive VFD17AMS43ANSAA

The Delta VFD17AMS43ANSAA is a 10 HP, 480V class AC drive in the MS300 family, built for compact motor control in three-phase industrial systems. It is rated at 17A in heavy-duty use and 20.5A in normal-duty use, with an IP20 enclosure and frequency range up to 599 Hz.

This model uses open-loop vector control (sensorless vector control) and supports DC injection braking plus dynamic braking. It is ideal for systems where reliable speed control, compact size, and drive-side flexibility matter more than closed-loop feedback architecture.

• Conveyors, pumps, and fans
• Mixers and light process equipment
• Packaging machines and general factory automation
• Compact three-phase motor-control systems
• Retrofit applications in the 480V, 10 HP range

This drive is particularly suitable for control cabinets where space and clean wiring matter, and where sensorless vector control provides the right balance between performance and simplicity.

Before replacing this drive, confirm the following parameters:

• Voltage class and phase requirement
• Motor horsepower and duty-current target
• Control method requirements
• Need for closed-loop feedback or line regeneration
• Cabinet space constraints (D1 frame, IP20 enclosure)

For machines with hard cycling at low speed or heavy starting loads, the 17A heavy-duty rating is critical. For lighter applications, the 20.5A normal-duty rating may be sufficient.

It is a Delta MS300 variable frequency drive rated for 10 HP / 7.5 kW, 480V class, 3-phase input, with 17A heavy-duty and 20.5A normal-duty current ratings.

No. The published specifications describe it as an open-loop vector or sensorless vector drive and specifically indicate closed loop: no. It is best used where vector-style motor control is needed without encoder-based feedback.

Yes. This model lists DC injection braking, dynamic braking, and an included dynamic braking transistor, which makes it more capable than a bare inverter in stop-and-deceleration applications.

Heavy-duty and normal-duty ratings reflect different load expectations. For this drive, the published values are 17A HD and 20.5A ND. In practice, the heavy-duty value is the safer sizing reference for tougher starts and higher overload demand, while normal-duty is more appropriate for lighter variable-torque applications.

Check the machine's input voltage, motor HP/kW, required current, control method, and whether the application needs closed-loop or regenerative features. Also confirm cabinet space, as this model uses a D1 frame and IP20 enclosure for protected panel installation.