Do you have a question about the Delta VFD-MS300 Series and is the answer not in the manual?
Connect DCM to MI1 (FWD) and MI2 (REV) for remote stop/start control.
Connect potentiometer to +10V, AVI, and ACM for remote speed variation.
Set parameters 00.20, 00.21, and 02.00 for remote operation modes.
Factory default V/F curve settings for general applications.
V/F curve settings optimized for fan and hydraulic applications.
V/F curve settings for applications requiring high starting torque.
Wiring and connection must be performed by a registered electrician to avoid voiding warranty.
Check motor suitability and configure terminals for VFD supply (DELTA for 1ph).
Parameter 00.02 resets all settings to factory defaults for 50Hz.
Parameter 00.20 sets the source for master frequency command (e.g., analog input).
Parameter 00.21 selects the source for master operation command (e.g., external terminals).
Set parameters 01.00-05.04 to match motor nameplate specifications.
Perform auto-tuning (05-00) after entering motor parameters for optimal performance.
Description of the VFD control panel buttons and their functions.
Details on the display items and their corresponding keypad functions.
The VSD-MS300 Series is a Variable Speed Drive (VSD) designed for controlling the speed of electric motors. It offers a range of features for both simple and complex applications, suitable for various industrial and commercial settings.
The primary function of the VSD-MS300 Series is to provide precise control over motor speed and operation. It achieves this by converting the fixed frequency and voltage of the incoming AC power supply into a variable frequency and voltage output, which then drives the motor. This allows for smooth acceleration and deceleration, energy savings, and improved process control.
The device supports both single-phase and three-phase power inputs, making it versatile for different electrical infrastructures. For single-phase supply, the motor must be connected in a DELTA configuration. For three-phase supply, users should consult the motor's nameplate for 400V connection details.
The VSD-MS300 Series incorporates various control methods to suit different application needs. It can be operated via a digital keypad, external analog input, or external UP/DOWN terminals, providing flexibility in how the motor speed is commanded. The device also includes features for setting maximum and minimum frequencies, acceleration and deceleration times, and motor parameters such as nameplate current, kW, speed (rpm), and number of poles.
An auto-tuning function is available to optimize the drive's performance with the connected motor. This function can perform either a dynamic test (motor unloaded) or a static test, ensuring efficient and stable operation.
The VSD-MS300 Series is designed for user-friendly operation, with a clear display and intuitive keypad for setup and control.
While the manual primarily focuses on setup and operation, several aspects contribute to the maintainability and longevity of the VSD-MS300 Series:
| Braking Unit | Built-in |
|---|---|
| Control Mode | V/F Control, Sensorless Vector Control |
| Humidity | Less than 90% RH (non-condensing) |
| Cooling Method | Fan cooling |
| Enclosure Rating | IP20 |
| Overload Capacity | 150% for 1 minute |
| Communication Interface | RS-485 |
| Protection Features | Overvoltage, undervoltage, overcurrent, overload, short circuit, overheating |
| Output Voltage | 0 to Input Voltage |
| Power Range | 0.2 kW to 22 kW |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -20°C to 60°C |












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