1. Product Overview
The ZUKED 720 Series Variable Frequency Drive (VFD) is designed for precise motor speed regulation, offering high performance, stability, and a wide speed regulating range. It features a robust design with heat-resistant and flame-retardant shell material, a user-friendly keyboard, and a clear digital display.
This VFD utilizes a unique control method to achieve high torque and high precision. It boasts excellent anti-trip performance and adaptability to challenging power, temperature, humidity, and dust conditions. Optimized PWM control technology and electromagnetic compatibility ensure low noise and minimal electromagnetic interference. Integrated protection features safeguard against overcurrent, overvoltage, overheating, overload, undervoltage, and intelligent power module faults.
The ZUKED 720 series is simple to operate and wire, providing fast start and stop response with significant torque at low speeds. It is suitable for three-phase motors.
2. Specifications
| Feature | Description |
|---|---|
| Model Number | Variable Frequency Drive |
| Type | DC/AC Inverters |
| Power Rating | 11 kW |
| Input Voltage | 380V Three-phase |
| Output Voltage | 0-380V Three-phase |
| Output Current | 25A |
| Output Frequency | 0-30000 Hz |
| Weight | 4.1 kg |
| Output Type | Triple |
| Suitable Motor Type | For 3-phase Motor |
| Control Method | V/F open loop, PWM control |
| Protection Level | IP20 |
| Cooling | Air cooling with fan control |
| Installation Type | Wall-hanging type, cabinet type |
2.1 Environmental Conditions
- Ambient Temperature: -10℃ to +40℃. Derate capacity if operating above 40℃.
- Ambient Humidity: 5% to 95% RH, non-condensing.
- Surroundings: Indoor use only, away from direct sunlight, corrosive or flammable gases, oil fog, and dust.
- Altitude: Derate capacity by 10% for every 1000m above 1000m.
2.2 Technical Index
| Parameter | Specification |
|---|---|
| Rated Voltage | 3-phase (4#series) 380V/50/60Hz |
| Allowed Voltage Range | 3-phase (4#series) 320V - 460V |
| Output Voltage Range | 3-phase (4#series) 0-460V |
| Output Frequency Range | Low frequency mode: 0-300Hz; High frequency mode: 0-3000Hz |
| Frequency Overload (G type) | 110% for long-term, 150% for 1 min, 180% for 5s |
| Control Mode | V/F control, advanced V/F control, V/F separation control, electric current vector |
| Frequency Setting Resolution | Analog Input: 0.1% of maximum output frequency; Digital Setting: 0.01 Hz |
| Senseless Vector Control | Starting torque: 0.5 Hz 150% rated torque (SVC), 0.05 Hz 180% rated torque (SVC). Operating speed precision in steady state: ±0.5% rated synchronous speed. Torque response: ≤20ms SVC, FVC ≤20ms. |
| Undervoltage Restrain | Specialized for users with a low or unsteady voltage power grid. |
| Multi-velocity and Traverse | 16 segments programmable multi-velocity control, multiple operation modes. Traverse operation, preset frequency and center frequency adjustable, parameter memory and recovery after power cut. |
2.3 Chassis and Keyboard Dimensions
Refer to the diagram below for chassis and keyboard dimensions.
3. Setup and Wiring
3.1 Basic Wiring Diagram
The wiring parts of the VFD include major loop and control loop. Open the cover of I/O terminals, and conduct wiring according to the following diagram. Ensure all connections are secure and correct before applying power.
3.2 Control Loop Terminal Functional Specification
The control loop terminals provide various input and output functions for integrating the VFD into a control system.
3.3 Dial Switch Settings
The dial switches (jumpers) are used to configure specific functionalities, such as 485 communication matching resistance and analog input signal selection.
3.4 Wiring Notices
- Cut off the input power of the VFD while dismantling and changing the motor.
- Switching of motor or work frequency power supply should only be conducted when the VFD stops output.
- To reduce the effect of EMI (electromagnetic interference), add a surge absorber when electromagnetic contactor and relay are close to VFD.
- Do not connect AC input power to output terminal U, V, W of VFD.
- Add an isolating device to the external control line or use shield line.
- Input order signal line should be wired separately with shielding, and away from major loop wiring.
- When carrier frequency is less than 4kHz, keep the distance between VFD and motor within 50m; when carrier frequency exceeds 4kHz, make an appropriate reduction of the distance, and better lay the wire in metal tube.
- When adding peripherals (filters, reactors, etc.) to the VFD, check the ground resistance with 1000V tramegger and ensure the value is above 4 MΩ.
- Do not add phase advance capacitor or RC snubber to the U, V, W terminal of VFD.
- If the VFD starts frequently, do not cut off the power, use the COM/RUN of control terminal to conduct start and stop so as not to damage the rectifier bridge.
- The earth terminal must be grounded reliably (grounding impedance should be under 100 Ω) to avoid accidents, or there might be electric leakage.
- Choose the wire diameter according to national electrical code while conducting major loop wiring.
3.5 Selection of Braking Resistor
Refer to the tables below for selecting the appropriate braking resistor based on the converter power and voltage.
- Please select the resistance value specified by the company.
- If the brake resistance provided by the company is used, and causes the frequency converter or other equipment to be damaged, the company shall not bear any responsibility.
- The installation of brake resistance must consider the safety of the environment, flammability, distance frequency converter at least 100 mm.
- The parameters in the table are for reference only and not as standard.
4. Operation and Display
4.1 Operating Panel
The VFD features a humanized operating panel for easy control and monitoring.
4.2 Operation Panel Keys
| Key | Name | Function Description |
|---|---|---|
| PRG | Programming / Escape key | Enter or escape from programming mode. |
| ENTER | Enter key | Enter into sub-menu items or confirm data. |
| ▲ | Increase key | Data or function code increase (speed up the increasing rate by keeping pressing the key). |
| ▼ | Decrease key | Data or function code decrease (speed up the decreasing rate by keeping pressing the key). |
| ► | Shift / Monitor key | Choose the bit of the data which is to be set and modified when the VFD is in edit status; switch monitor parameter to be shown when the VFD is in other modes. |
| RUN | Run key | Enter into run mode under keypad model. |
| STOP/RESET | Stop / Reset key | In common run status the VFD will be stopped according to set mode after press this key if run command channel is set as keyboard stop effective mode. The VFD will be reset and resume normal stop status after pressing this key when the VFD is in malfunction status. |
| MF K | Function key | According to the setting of function parameter FE.01, jog or reverse run, and frequency clearance is available when pressing this key under keypad mode. |
4.3 LED and Indicator Light Description
The VFD's display panel includes various LED indicators to show its current status and parameters.
4.4 Function Codes (F0 Group - Basic Run Parameters)
The VFD's behavior can be configured using various function codes. The F0 group covers basic run parameters.
5. Maintenance
Proper maintenance ensures the longevity and reliable operation of your ZUKED 720 VFD.
- Environmental Control: Ensure the VFD operates within the specified ambient temperature (-10℃ to +40℃) and humidity (5%-95% RH, non-condensing) ranges. Avoid direct sunlight, corrosive gases, flammable gases, oil fog, and excessive dust.
- Altitude Considerations: If operating above 1000m, ensure the VFD is derated by 10% for every 1000m increase in altitude.
- Cleaning: Regularly inspect and clean the VFD's cooling fins and fan to prevent dust accumulation, which can hinder heat dissipation.
- Wiring Integrity: Periodically check all wiring connections for tightness and signs of wear or damage. Ensure proper shielding and grounding are maintained.
- Spare Circuit: It is recommended to have a spare circuit in place to minimize downtime in case of VFD failure or tripping. Confirm and test the operation characteristics of the spare circuit in advance to ensure compatibility with the working frequency and phase sequence.
6. Troubleshooting
The ZUKED 720 VFD is equipped with various protective functions to ensure safe operation. If an issue occurs, refer to the LED indicators and the protective functions for initial diagnosis.
6.1 Protective Functions
The VFD includes the following built-in protections:
- Overcurrent
- Overvoltage
- Overheat
- Overload
- Undervoltage
- Intelligent Power Module (IPM) protection
When a protection is triggered, the VFD will typically stop operation and display an alarm. Refer to the LED indicator descriptions to identify the specific fault.
6.2 LED Indicator Alarms
The 'ALM' indicator light signifies an alarm condition. The digital display will show relevant fault codes or parameters. Consult the 'LED and Indicator Light Description' (Figure 8) for details on alarm indications.
- ALM: Alarm indicator light, indicates that the VFD is in over current or over voltage suppressing status or failure alarm status currently.
If the VFD trips frequently, ensure that environmental conditions (temperature, humidity, dust) are within specified limits and that wiring is correctly installed and grounded.
7. User Tips
No specific user tips were available from reviews or Q&A for this product. However, general best practices for VFDs include:
- Always ensure proper grounding to prevent electrical leakage and ensure safety.
- Use shielded cables for control signals to minimize electromagnetic interference.
- Regularly check and clean cooling vents to maintain optimal operating temperature.
- For frequent start/stop operations, utilize the COM/RUN control terminal instead of cutting off the main power to prevent damage to the rectifier bridge.
8. Warranty and Support
Information regarding product warranty and customer support was not provided in the available data. Please refer to your purchase documentation or contact the seller directly for details on warranty coverage and technical assistance.