1. Introduction
The KUAIQU DC Power Supply is a professional-grade power supply designed for various electronic applications, laboratories, and DIY projects. It features high precision, low ripple, and multiple protection mechanisms to ensure safe and reliable operation. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting.
Product Overview
The device is equipped with a 4-digit LED display for clear readings of voltage, current, and power. It includes coarse and fine adjustment knobs for precise control, a 5V/2A USB port for charging external devices, and an intelligent cooling fan system.
Figure 1: Front view of the KUAIQU DC Power Supply (SPS-C3010 model)
2. Safety Precautions
Always observe the following safety precautions to prevent injury or damage to the device:
- Ensure the correct input voltage (AC 110V or AC 220V) is selected for your region. This device is not wide voltage.
- Do not operate the power supply in wet or damp conditions.
- Do not block the ventilation openings. Ensure adequate airflow around the unit.
- Do not attempt to open or repair the unit. Refer all servicing to qualified personnel.
- Always connect the output terminals correctly, observing polarity.
- Avoid short-circuiting the output terminals for extended periods.
- Disconnect power before making any connections or disconnections.
3. Package Contents
Verify that all items are present in the package:
- DC Power Supply Unit (SPS-C3010 or selected model)
- Output Power Cord (1)
- Input Power Cord (1)
- User Manual (1)
Figure 2: Included accessories: Output Line and Power Cable.
4. Product Specifications
| Feature | Specification |
|---|---|
| Model Number | AN205-SPS-C3010 (or other variants) |
| Output Power | 150-500W (specifically 300W for SPS-C3010) |
| Output Voltage | 0-30V (for SPS-C3010), 0-60V, 0-120V (depending on model) |
| Output Current | 0-10A (for SPS-C3010), 0-5A, 0-3A (depending on model) |
| Input Voltage | AC 110V / AC 220V (user selectable/model specific) |
| Output Frequency | 50/60Hz |
| Display Type | 4-digit LED display (Voltage, Current, Power) |
| USB Charging Port | 5V/2A (USB-A, some models include USB-C) |
| Cooling System | Intelligent Temperature Control Fan (activates above 50°C / 122°F) |
| Protection Features | Overvoltage Protection (OVP), Overcurrent Protection (OCP), Overheating Protection, Over Power Protection, Short Circuit Protection, Leakage Protection |
| Dimensions (SPS-C3010) | 215mm (8.4in) L x 85mm (3.3in) W x 139mm (5.5in) H |
| Weight (SPS-C3010) | 2.6 lb |
Figure 3: Physical dimensions and weight of the power supply.
Figure 4: High-quality components and intelligent temperature control fan. Fan starts work above 50°C (122°F).
Figure 5: Rear view with smart cooling fan and fuse box for voltage overload protection.
5. Setup
5.1 Initial Inspection
Before connecting the power supply, inspect the unit for any visible damage. Ensure all knobs are present and functional.
5.2 Power Connection
- Ensure the power switch on the front panel is in the OFF position.
- Connect the provided input power cord to the AC input port on the rear of the power supply.
- Plug the other end of the input power cord into a suitable AC outlet (110V or 220V, depending on your model/selection).
5.3 Output Connections
Connect your load to the output terminals on the front panel:
- Connect the positive (+) terminal of your load to the red output terminal.
- Connect the negative (-) terminal of your load to the black output terminal.
- Connect the ground (GND) terminal of your load to the green output terminal if grounding is required for your application.
Figure 6: Front panel showing Voltage Display, Current Display, Power Display, USB Interface (5V/2A), Power button, ON/OFF button, V-COARSE, V-FINE, A-COARSE, A-FINE knobs, Output negative (-), GND, and Output positive (+).
6. Operating Instructions
6.1 Powering On/Off
- Press the "POWER" button to turn on the unit. The display will light up.
- Press the "ON/OFF" button (green button) to enable/disable the output. The status light will indicate if the output is active.
Figure 7: Steps to power on and enable output. 1. Set current/voltage. 2. Press ON/OFF. 3. Start to work.
6.2 Adjusting Voltage and Current
Use the coarse and fine adjustment knobs for precise control:
- Voltage Adjustment:
- Rotate V-COARSE for large voltage adjustments.
- Rotate V-FINE for small, precise voltage adjustments.
- Current Adjustment:
- Rotate A-COARSE for large current adjustments.
- Rotate A-FINE for small, precise current adjustments.
Note:
- The current can be adjusted without connecting the output line. This allows you to preset the current limit before connecting a sensitive load.
- For models with encoder adjustment (e.g., SPPS-A3010D, SPPS3010D), you can directly set current/voltage using the encoder knob and V/A button.
Figure 8: Detailed view of voltage and current adjustment knobs.
6.3 Using the USB Charging Port
The 5V/2A USB port (USB-A, some models include USB-C) on the front panel can be used to charge mobile phones, tablets, or other compatible devices.
Figure 9: USB Port (5V/2A) for charging external devices.
6.4 Constant Voltage (CV) and Constant Current (CC) Modes
The power supply operates in either Constant Voltage (CV) or Constant Current (CC) mode, indicated by the respective LEDs on the display.
- CV Mode: The output voltage remains constant at the set value, while the current varies depending on the load. The C.V indicator will be lit.
- CC Mode: The output current remains constant at the set value, while the voltage varies depending on the load. This occurs when the load resistance is too low for the set voltage, causing the current to reach its preset limit. The C.C indicator will be lit.
Video 1: Demonstration of setting current and voltage, and the difference between old and new models. The new model allows current adjustment without connecting the output line, which is more convenient.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your power supply:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners or solvents.
- Ventilation: Regularly check that the ventilation openings on the sides and rear are clear of dust and debris. The intelligent cooling fan will activate automatically when needed.
- Storage: Store the unit in a cool, dry place away from direct sunlight and extreme temperatures.
- Fuse Replacement: The unit is equipped with a fuse for voltage overload protection. If the unit fails to power on or operate, check the fuse located at the rear of the unit. Replace with a fuse of the same type and rating if necessary.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No power from outlet, power cord loose, blown fuse. | Check power outlet, ensure power cord is securely connected, check and replace fuse if blown. |
| No output voltage/current. | Output switch is OFF, load is open circuit, internal fault. | Press the ON/OFF button to enable output. Check load connection. If problem persists, contact support. |
| Output voltage/current is unstable. | Loose connections, unstable input power, faulty load. | Check all connections. Ensure stable input power. Test with a different load. |
| Overvoltage Protection (OVP) or Overcurrent Protection (OCP) triggered. | Load drawing too much current or voltage exceeding limits. | Reduce load, check for short circuits in the load, or adjust voltage/current settings. |
| Fan is not spinning. | Normal operation if temperature is below 50°C (122°F), or fan malfunction. | This is normal if the unit is not hot. If the unit is hot and the fan is not spinning, ensure vents are clear. If problem persists, contact support. |
9. User Tips
Based on common user experiences and questions:
- Battery Charging: For charging car batteries, ensure the battery type is compatible with the power supply's output voltage and current limits. For example, a 300W 10A model can charge a car battery, but charging time may vary.
- Short Circuit Behavior: The upgraded models feature OCP/OVP protection that triggers an alarm and stops output in case of a short circuit or overcurrent/overvoltage. This protects both the power supply and the connected device.
- Voltage/Current Pre-setting: For models with encoder adjustment, you can set the desired voltage and current limits before connecting your load and enabling the output. This is a safer way to operate, especially with sensitive electronics.
- Fan Operation: The cooling fan is temperature-controlled and will only activate when the internal temperature exceeds 50°C (122°F). If the unit is cool, the fan will remain off to reduce noise and save energy.
- Display Protective Film: A protective film is applied to the display screen to prevent scratches during shipping. You can remove this film before use for a clearer view.
10. Warranty & Support
Our store provides a 12-month warranty policy for this product. For any questions or issues, please contact customer support. We aim to respond within 24 hours during working time.
- Free Replacement: Available for orders within 30 days from the delivery date.
- Partial Replacement: For orders from 1 to 12 months, a partial payment of the order value may be required for replacement parts.
- Older Orders: For orders older than 12 months, small discounts may be offered for support or replacement parts.
For technical assistance or warranty claims, please refer to the contact information provided with your purchase or on the seller's official store page.