1. Introduction and Overview
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of the SINOTIMER Adjustable Voltage Protector (Model SVP-916 40A). This device is designed to protect single-phase electrical equipment in residential AC120V systems from over-voltage, under-voltage, and over-current conditions.
Key Features:
- Automatic Recovery: The protector automatically restores power when circuit voltage and current return to normal, safeguarding connected equipment.
- Dual LED Display: Real-time display of measured voltage and current for continuous monitoring.
- Adjustable Protection Parameters: Overvoltage, undervoltage, overcurrent thresholds, and fault recovery delay times are fully adjustable to suit specific requirements.
- Comprehensive Protection: Provides protection against over-voltage, under-voltage, and over-current issues for residential household box entry or distribution lines.
- Economical Load Capacity: Available in various resistive load capacities, including 40A, suitable for typical residential applications.
2. Safety Precautions
WARNING: Electrical shock hazard. Installation and maintenance should only be performed by qualified personnel. Disconnect power before installation or servicing.
- Ensure the main power supply is disconnected before attempting any installation or wiring.
- Verify that the protector's current rating matches or exceeds the expected load.
- The neutral line (N) of the protector is directly connected and does not have a disconnection function. Ensure proper wiring according to local electrical codes.
- Do not operate the device if it appears damaged.
3. Setup and Installation
3.1 Product Dimensions
Before installation, verify the physical dimensions of the protector to ensure it fits within your electrical panel or enclosure.
Image 3.1: Front and side view of the SINOTIMER Adjustable Voltage Protector with key dimensions indicated. The device measures 85mm in height, 35mm in width, and 65mm in depth (including the DIN rail clip), designed for compact installation.
3.2 Mounting
The SINOTIMER SVP-916 is designed for surface mounting, typically on a DIN rail within an electrical distribution box. Ensure a secure and stable mounting location.
3.3 Wiring Connections
Follow the wiring diagram carefully. Incorrect wiring can lead to device malfunction or electrical hazards. The protector has clearly marked "IN" (Input) and "OUT" (Output) terminals for Line (L) and Neutral (N).
Image 3.2: Wiring diagram illustrating the connection of the SINOTIMER Adjustable Voltage Protector (SVP-916) within an electrical circuit. It shows the protector connected between a power switch and an air circuit breaker, with clear indications for Line (L) and Neutral (N) inputs and outputs.
- Connect the incoming Line (L) and Neutral (N) wires from your power source to the "IN" terminals of the protector.
- Connect the outgoing Line (L) and Neutral (N) wires from the "OUT" terminals of the protector to your load (e.g., distribution panel, circuit breaker).
- Ensure all connections are tight and secure to prevent loose contacts and overheating.
3.4 Initial Power-Up
After wiring, restore power to the circuit. The protector's LED displays should illuminate, showing the current voltage and current readings. The device will perform a self-check and then enter normal operating mode.
4. Operation
4.1 LED Displays
The SVP-916 features two LED displays for real-time monitoring:
Image 4.1: The SINOTIMER Adjustable Voltage Protector displaying voltage (red LED) and current (green LED) readings. The control buttons (SET, Up, Down) are visible below the displays.
- Upper (Red) Display: Shows the measured voltage (V).
- Lower (Green) Display: Shows the measured current (A).
- Indicator Lights: Small LEDs indicate Overvoltage (OV: fast blink), Undervoltage (UV: slow blink), and Overcurrent (OC: fast blink).
4.2 Adjustable Settings
The protector allows adjustment of various parameters to customize protection levels. Use the SET, ▲ (Up), and ▼ (Down) buttons to navigate and modify settings.
- Overvoltage Protection Value (OV): Sets the maximum allowable voltage.
- Undervoltage Protection Value (UV): Sets the minimum allowable voltage.
- Overcurrent Protection Value (OC): Sets the maximum allowable current.
- Fault Recovery Delay Time (t-on): Sets the delay before the device automatically reconnects after a fault clears.
- Undervoltage Breaking Time (t-off): Sets the delay before the device trips on undervoltage. Note: If this time is greater than 0.3 seconds, the protector may not open immediately after a power failure.
4.3 Setting Adjustment Procedure
- Press and hold the SET button for a few seconds to enter the setting mode.
- Use the SET button to cycle through the different parameters (OV, UV, OC, t-on, t-off).
- Use the ▲ (Up) and ▼ (Down) buttons to adjust the value of the selected parameter.
- Once all desired settings are configured, wait for a few seconds without pressing any buttons. The device will automatically save the settings and exit the setting mode.
5. Maintenance
The SINOTIMER Voltage Protector is designed for long-term, reliable operation with minimal maintenance. However, periodic checks can help ensure optimal performance.
- Cleaning: Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Connection Check: Periodically inspect wiring connections to ensure they remain tight and free from corrosion.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent damage.
- Functionality Test: If possible and safe to do so, periodically test the protection functions by simulating an over-voltage or under-voltage condition (e.g., using a variable power supply, if available and safe).
6. Troubleshooting
This section addresses common issues you might encounter with the SINOTIMER Voltage Protector.
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power output. | No input power; incorrect wiring; internal fault. | Verify input power supply. Check wiring connections (L and N). If power is present and wiring is correct, the device may be faulty. |
| Device trips frequently. | Voltage/current fluctuations exceeding set limits; incorrect settings; overloaded circuit. | Check actual voltage/current readings. Adjust OV/UV/OC settings if necessary, ensuring they are appropriate for your system. Reduce load if circuit is overloaded. |
| Does not automatically reconnect. | Fault condition still present; t-on delay set too long; internal fault. | Ensure the fault condition (over/under voltage/current) has cleared. Check the t-on (recovery delay) setting. If the fault has cleared and delay is appropriate, device may require manual reset (power cycle) or be faulty. |
| Inaccurate voltage/current readings. | Loose connections; device malfunction. | Check all wiring connections for tightness. Compare readings with a calibrated multimeter. If readings are consistently off, the device may be faulty. |
| Undervoltage trip delay issue. | t-off setting is too high (greater than 0.3 seconds). | Adjust the t-off setting to a value less than or equal to 0.3 seconds if immediate disconnection upon undervoltage is desired. |
7. Technical Specifications
| Specification | Value |
|---|---|
| Brand | SINOTIMER |
| Model | SVP-916 (40A variant) |
| Coil Voltage | 120 Volts (AC) |
| Current Rating | 40 Amps (Resistive Load) |
| Operation Mode | Automatic |
| Connector Type | Screw Terminals |
| Contact Material | Silver |
| Contact Type | Normally Open |
| Mounting Type | Surface Mount (DIN Rail compatible) |
| Product Dimensions (L x W x H) | 3.39 x 1.42 x 2.64 inches (approx. 86 x 36 x 67 mm) |
| Item Weight | 6.3 ounces (approx. 178.6 grams) |
| Date First Available | January 2, 2025 |
8. Warranty and Support
For warranty information and technical support, please contact the manufacturer directly. Refer to the product packaging or the official SINOTIMER website for the most current contact details.
Manufacturer: SINOTIMER
Online Store: Visit the SINOTIMER Store on Amazon
9. Official Product Videos
No official product videos from the seller were found with embeddable URLs in the provided data. Please refer to the product page on Amazon for any available video content.
