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KD4000-1S Series Single-Phase Input & Single-Phase Output VFDPurpose-built speed control for compatible 220V single-phase motors in light-load fan and pump applications. The KD4000-1S accepts single-phase 220V power and provides controlled single-phase 220V output. 1-Phase 220V Input>>KD4000-1S>>1-Phase 220V Output View KD4000-1S Details Compatibility check:This series is designed for compatible single-capacitor, single-phase 220V motors.
It cannot be used with dual-capacitor motors. Confirm the motor type, rated current and load before ordering. Is This the Right VFD for Your Motor?A single-phase output VFD is different from the more common single-phase-input, three-phase-output drive. Match the VFD to the motor construction—not only to the supply voltage. Suitable Applications
Not Suitable
KD4000-1S Model SelectionChoose by the adapted motor rating and motor nameplate current. Do not select only by the kW printed in the VFD model name.
All listed models: single-phase 220V ±15% input and single-phase 220V ±15% output. Final selection should also consider starting demand, load characteristics and operating environment. Simple, Motor-Specific WiringFor a compatible single-capacitor motor, the KD4000-1S supports direct connection without disassembling the motor capacitor. This makes it practical for retrofitting suitable existing fan and pump systems.
Installation and commissioning should be completed by qualified electrical personnel.  Typical ApplicationsThe KD4000-1S is intended mainly for light-load single-phase motor applications where speed adjustment, smoother starting and process control are required. Single-Phase Fans Single-Phase Pumps Axial Fans Frequently Asked QuestionsCan a normal VFD run a single-phase motor?Most standard VFDs are designed for three-phase motors. Use a drive whose output and control method are specifically designed for a compatible single-phase motor, such as the KD4000-1S. Can the KD4000-1S be used with a dual-capacitor motor?No. The KD4000-1S product specification states that it cannot be used with dual-capacitor motors. Do I need to remove the motor capacitor?For a compatible single-capacitor motor, the KD4000-1S supports direct wiring without disassembling the motor capacitor. Always follow the model-specific wiring diagram. How do I choose the correct model?Check the motor type, rated voltage, kW, nameplate current and load. Select a model whose adapted-motor rating and output current meet the application; ask KARDA to confirm uncertain or high-starting-load cases. Need Help Matching Your Single-Phase Motor?Send KARDA a clear motor-nameplate photo, the capacitor type, load description and required speed range. We will help confirm compatibility and select the appropriate KD4000-1S model. Contact KARDA |