1. Introduction
The SINOTIMER SVP-912 is an adjustable overvoltage and undervoltage protective device designed for single-phase electrical equipment. It is primarily used in residential household boxes or distribution lines to safeguard electrical appliances from damage caused by abnormal voltage conditions. This device automatically cuts off the power supply when overvoltage or undervoltage occurs and restores power once the voltage returns to normal levels.
2. Safety Information
- Installation and maintenance should only be performed by qualified electricians.
- Ensure the main power supply is disconnected before installation or any wiring work.
- Verify that the device's specifications (voltage, current) match your electrical system requirements.
- Do not operate the device with wet hands or in damp conditions.
- This device is for protection against voltage fluctuations; it does not protect against overcurrents unless integrated with an appropriate circuit breaker.
3. Product Overview
The SVP-912 features an LED display for real-time voltage monitoring and buttons for setting protection parameters. It is designed for Din Rail mounting.
3.1 Package Contents
- 1 x SINOTIMER SVP-912 Voltage Protective Device
- 1 x User Manual
3.2 Device Layout
4. Installation
4.1 Mounting
The SVP-912 is designed for standard 35mm Din Rail mounting. Ensure the Din Rail is securely fastened within an electrical enclosure or distribution box.
4.2 Dimensions
Refer to the diagram below for precise dimensions to ensure proper fit and clearance during installation.
4.3 Wiring Diagram
Connect the SVP-912 according to the wiring diagram provided. Ensure correct polarity (Neutral 'N' and Live 'L') for both input (IN) and output (OUT) terminals. It is recommended to install the voltage protector in series with a power switch and an air circuit breaker for comprehensive protection.
5. Operation
5.1 Functions
- Overvoltage protection
- Undervoltage protection
- Real-time voltage display (voltage measurement)
- Adjustable overvoltage protection value
- Adjustable overvoltage recovery value
- Adjustable overvoltage protection operation time
- Adjustable undervoltage protection value
- Adjustable undervoltage recovery value
- Adjustable undervoltage protection operation time
- Adjustable fault recovery delay time
- Adjustable power-on delay time
- Reset mode selection
- Fault query
- Restore factory settings
5.2 Setting Parameters
The device features 'SET', 'UP' (▲), 'DOWN' (▼), and 'ADJ' buttons for configuration. Specific instructions for adjusting each parameter (overvoltage/undervoltage thresholds, recovery times, delay times) are typically detailed in the full manufacturer's manual. Generally, the 'SET' button is used to enter the setting mode, 'UP' and 'DOWN' to adjust values, and 'ADJ' or 'SET' again to confirm and exit.
The LED display shows the current voltage. When an overvoltage or undervoltage event occurs, the corresponding 'Over(V)' or 'Under(V)' indicator light will illuminate, and the device will cut off power.
6. Maintenance
The SVP-912 is designed for low maintenance. Periodically inspect the device for any signs of physical damage, loose connections, or discoloration. Ensure the ventilation slots (if any) are free from dust and debris. Cleaning should be done with a dry, soft cloth. Do not use abrasive cleaners or solvents.
7. Troubleshooting
- Device not powering on: Check input wiring (L and N terminals) and ensure the main power supply is active.
- Frequent tripping: Review your set overvoltage and undervoltage thresholds. They might be too sensitive for your power supply conditions. Adjust the recovery delay time if brief fluctuations are causing unnecessary trips.
- Incorrect voltage reading: Verify the input voltage with a multimeter to ensure the device's reading is accurate. If discrepancies persist, contact support.
- Device not resetting automatically: Check the 'Reset mode selection' settings. Ensure it is configured for automatic recovery if desired.
8. Specifications
| Parameter | Value |
|---|---|
| Nominal Voltage (Un) | AC230V~50/60Hz |
| Rated Current (Ie) | 40A |
| Overvoltage Protection Range (Uvo) | AC221V-300V (Adjustable) |
| Undervoltage Protection Range (Uve) | AC150V-219V (Adjustable) |
| Recovery Time | 2-512s (Adjustable) |
| Material | ABS + Electronic Component |
| Dimensions (H x W x D) | 85mm x 36mm x 65mm |
| Mounting | 35mm Din Rail |
| Color | White |
9. User Tips
- For optimal protection, set the overvoltage and undervoltage thresholds slightly outside your normal operating voltage range to avoid nuisance tripping while still providing effective safeguarding.
- Consider the recovery delay time carefully. A longer delay can prevent rapid on/off cycling during unstable power conditions, protecting sensitive equipment.
- Regularly check the LED display to monitor your line voltage and ensure it remains within safe operating parameters.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.
