The Delta VFD015EL21W is a frequency converter or inverter manufactured by Delta Electronics. It is designed to control the speed of an AC induction motor by varying the output frequency and voltage. Here are some key specifications of the VFD015EL21W:

1. Power Capacity: The VFD015EL21W has a power capacity of 1.5 kW (2 HP), which means it can control motors with a rated power of up to 1.5 kW.

2. Input Voltage: The input voltage of the VFD015EL21W is typically 1-phase 200-240V AC, although the specific voltage range may vary depending on the model.

3. Output Voltage: The output voltage of the VFD015EL21W is adjustable and can match the motor's voltage requirements.

4. Control Methods: The VFD015EL21W supports several control methods, including V/f control (Voltage to Frequency Control), sensorless vector control, and torque control. These control methods provide different levels of accuracy and performance for various motor applications.

5. Communication and Expansion: The VFD015EL21W features several communication interfaces, such as Modbus RTU, CANopen, and RS485. It also supports various expansion modules to enhance its functionality.

6. Protection and Safety Features: The VFD015EL21W includes various protection and safety features, such as overvoltage and undervoltage protection, overload protection, short-circuit protection, motor phase loss protection, and overheat protection.

7. Programming and Operation: The VFD015EL21W can be programmed and operated using a built-in keypad or through a computer using dedicated software. It offers various parameter settings for customization and optimization.