Appendix D CEVFD-S Series

C.2 General Precautions

Selection Note

A.When the AC Motor Drive is connected directly to a large-capacity power transformer (600kVA or above) or when phase lead capacitors are switched, excess peak currents may occur in the power input circuit and the rectifier section might be damaged. To avoid this, use an AC input reactor (optional) before AC Motor Drive mains input to reduce the current and improve the input power efficiency.

B.When a special motor is used or more than one motor is driven in parallel with a single AC Motor Drive, select the AC Motor Drive current ≥1.25x(Sum of the motor rated currents).

C.The starting and accel./decel. characteristics of a motor are limited by the rated current and the overload protection of the AC Motor Drive. Compared to running the motor D.O.L. (Direct On-Line), a lower starting torque output with AC Motor Drive can be expected. If higher starting torque is required (such as for elevators, mixers, tooling machines, etc.) use an AC Motor Drive of higher capacity or increase the capacities for both the motor and the AC Motor Drive.

D.When an error occurs on the drive, a protective circuit will be activated and the AC Motor Drive output is turned off and the motor will coast to stop. For an emergency stop, an external mechanical brake is needed to quickly stop the motor.

Parameter Settings Note

A.The AC Motor Drive can be driven at an output frequency up to 400Hz (less for some models). Setting errors may create a dangerous situation. For safety, the use of the upper limit frequency function is strongly recommended.

B.High DC braking operating voltages and long operation time (at low frequencies) may cause overheating of the motor. In that case, forced external motor cooling is recommended.

C.Motor accel./decel. time is determined by motor rated torque, load torque, and load inertia.

C-4

Revision August 2006, SE08, SW V2.61

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Delta Electronics VFD007S23A manual General Precautions, Selection Note, Parameter Settings Note
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VFD007S23A specifications

Delta Electronics VFD007S23A is a highly versatile and efficient variable frequency drive (VFD) designed to control AC motors and enhance energy savings in various industrial applications. Known for its robust performance, this drive provides precise motor control and has become a preferred choice in industries requiring reliable and efficient motor management.

One of the main features of the VFD007S23A is its compact design, which makes it suitable for installations with limited space. With a compact size of only 200mm in height, 150mm in width, and 110mm in depth, it can be easily integrated into existing systems without needing extensive modifications.

The VFD supports a wide range of input voltages, accommodating 200V to 240V three-phase power supply. It is capable of delivering up to 0.75 kW of power, making it suitable for various applications including fans, pumps, and conveyors. Its adjustable frequency output allows for speed control, enhancing process efficiency and reducing energy consumption.

Equipped with advanced control technologies, the VFD007S23A offers both scalar and vector control modes. Scalar control is ideal for applications where precise speed control is not critical, while vector control provides superior torque performance, making it ideal for applications requiring high acceleration and deceleration. This feature allows users to achieve optimal performance regardless of the application requirements.

Incorporating features such as keypad programming, the VFD includes user-friendly interface allowing for easy setup and adjustments. The drive also supports various communication protocols, including Modbus RTU, enabling seamless integration into existing automation systems.

Another significant characteristic is its built-in protection features, including over-voltage, under-voltage, phase loss, and overload protection. These safety features ensure the durability and reliability of the device, extending its lifespan and minimizing downtime.

Additionally, the VFD007S23A is designed with energy efficiency in mind. It features an energy-saving mode that can reduce energy consumption significantly in variable load applications. By adjusting the motor speed according to the actual load demand, users can achieve lower operational costs while contributing to environmental sustainability.

In conclusion, Delta Electronics VFD007S23A stands out as an efficient and reliable choice for variable frequency drive applications. Its robust design, advanced control technologies, and energy-saving features make it ideal for a wide range of industrial applications, ensuring optimal performance and operational efficiency.
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