1. Introduction
The SINOTIMER SVP-916 is an automatic over-voltage and under-voltage protector designed for single-phase AC 230V, 50/60Hz electrical systems. It is suitable for loads with a rated working current of 63A or less. This device is primarily used for residential household box entry or for protecting distribution lines of single-phase electrical equipment against over-voltage, under-voltage, and over-current conditions.
Its main function is to instantaneously cut off the power supply when the circuit experiences over-voltage, under-voltage, or over-current problems, thereby protecting connected electrical equipment from damage. Furthermore, the protector is equipped with an automatic recovery feature, which restores the power supply once the circuit voltage returns to normal operating parameters.
2. Safety Information
WARNING: Electrical shock hazard. Installation and servicing should only be performed by qualified personnel.
- Always disconnect power before installing or servicing the device.
- Ensure all wiring connections are secure and comply with local electrical codes.
- Do not operate the device if it appears damaged.
- This device is designed for indoor use only.
- Keep children away from electrical installations.
3. Product Overview
The SVP-916 features a compact design for DIN rail mounting and includes a dual LED display for real-time voltage and current monitoring. It offers comprehensive protection features to safeguard your electrical appliances.
3.1 Key Features
- Working Voltage Display: Shows the current voltage.
- Working Current Display: Shows the current flowing through the circuit.
- Over-Voltage Protection (OV): Protects against excessively high voltage.
- Under-Voltage Protection (UV): Protects against excessively low voltage.
- Overcurrent Protection (OC): Protects against excessive current draw.
- Automatic Recovery: Automatically restores power after a fault clears.
- Surge Protection: Provides protection against sudden voltage spikes.
- Reset Time Adjust: Allows configuration of recovery delay.
- Fault Inquiry: Provides information on detected faults.
3.2 Device Components
The front panel features a dual LED display for voltage (V) and current (A) readings, along with three control buttons: SET, Up (▲), and Down (▼). The top terminals are for input (IN: N, L) and the bottom terminals are for output (OUT: N, L).
4. Installation
The SVP-916 is designed for easy installation on a standard 35mm DIN rail.
4.1 Mounting
- Ensure all power to the circuit is disconnected at the main breaker.
- Locate a suitable position on a 35mm DIN rail within your electrical panel.
- Attach the SVP-916 to the DIN rail by hooking the top edge onto the rail and pressing down until the bottom clip snaps into place.
4.2 Wiring
Connect the incoming power supply to the "IN" terminals and the load to be protected to the "OUT" terminals. Ensure correct polarity (Neutral to N, Live to L).
- Connect the incoming Neutral wire to the "N IN" terminal.
- Connect the incoming Live wire to the "L IN" terminal.
- Connect the outgoing Neutral wire (to load) to the "N OUT" terminal.
- Connect the outgoing Live wire (to load) to the "L OUT" terminal.
- Tighten all terminal screws securely.
Important: After wiring, double-check all connections before restoring power.
5. Operation
Once installed and powered on, the SVP-916 will display real-time voltage and current. You can adjust its protection parameters using the front panel buttons.
5.1 Initial Power-On
When you first connect the product and restore power, you must wait approximately 1 minute. The device will perform an internal check, and the red light will turn off, indicating it is ready for operation.
5.2 Display Readings
- The upper LED display shows the current voltage (V).
- The lower LED display shows the current flowing through the circuit (A).
- Indicators next to the display show "OV fast", "UV slow", "OC fast", and "ADJ" (adjustment mode).
5.3 Parameter Adjustment
To enter adjustment mode, press and hold the "SET" button. Use the "▲" (Up) and "▼" (Down) buttons to change values. Press "SET" again to cycle through parameters and save changes.
| Parameter | Adjustable Range | Default Value | Description |
|---|---|---|---|
| Max. Loading Power | 1~63A | 63A | Maximum current the device will allow before tripping. |
| Over-voltage Protection (OV) Value | 221V~300V~OFF | 280V | Voltage threshold above which protection activates. "OFF" disables OV protection. |
| Over-voltage Recovery Voltage | 220V--299V | 250V | Voltage at which power is restored after an OV event. |
| Over-voltage Protection Action Time | 0.1s~10s | 0.1s | Delay before tripping on over-voltage. |
| Under-voltage Protection (UV) Value | 219V--150V --OFF | 160V | Voltage threshold below which protection activates. "OFF" disables UV protection. |
| Under-voltage Recovery Voltage | 151V--220V | 180V | Voltage at which power is restored after a UV event. |
| Under-voltage Protection Action Time | 0.1s~10s | 0.1s | Delay before tripping on under-voltage. |
| Over-current Adjustment Range | 1-40A | 40A | Current threshold above which protection activates. |
| Over-current Action Time | 0.1s~512s | 5.0s | Delay before tripping on over-current. |
| Recovery Delay Time | 2s~120s | 60s | Delay before automatic power restoration after a fault clears. |
| Power-on Delay Time | 2s~10s | 2s | Delay before power is supplied to the load after initial power-up or manual reset. |
6. Maintenance
The SINOTIMER SVP-916 is designed for maintenance-free operation. However, periodic checks are recommended:
- Ensure the device and its connections are free from dust and debris.
- Periodically check terminal connections for tightness to prevent loose contacts.
- Visually inspect the device for any signs of physical damage or discoloration.
If any issues are observed, disconnect power immediately and consult a qualified electrician.
7. Troubleshooting
- Device not powering on after installation: Ensure all wiring is correct and secure. Remember the initial 1-minute power-on delay after first connection.
- Device trips frequently: Check the set over-voltage, under-voltage, and over-current parameters. They might be set too sensitively for your electrical environment or connected load. Verify that the connected load does not exceed the device's maximum current rating.
- Power does not restore after a trip: The device has an automatic recovery feature with a configurable delay. Wait for the "Recovery Delay Time" to elapse. If power still doesn't restore, check if the fault condition (e.g., over-voltage) has truly cleared.
- Display is blank or erratic: Disconnect power, wait a few minutes, and then restore power. If the issue persists, the device may be faulty.
For persistent issues, consult a qualified electrician or contact SINOTIMER customer support.
8. Specifications
| Parameter | Value |
|---|---|
| Model Number | SVP-916 |
| Power Supply | 230VAC 50/60Hz |
| Max. Loading Power | 1~63A Adjustable (Default: 63A) |
| Over-voltage Protection Value Range | 221V~300V~OFF (Default: 280V) |
| Over-voltage Recovery Voltage Range | 220V--299V (Default: 250V) |
| Over-voltage Protection Action Time | 0.1s~10s (Default: 0.1s) |
| Under-voltage Protection Value Range | 219V--150V --OFF (Default: 160V) |
| Under-voltage Recovery Voltage Range | 151V--220V (Default: 180V) |
| Under-voltage Protection Action Time | 0.1s~10s (Default: 0.1s) |
| Over-current Adjustment Range | 1-40A (Default: 40A) |
| Over-current Action Time | 0.1s~512 seconds (Default: 5.0s) |
| Recovery Delay Time | 2s~120s (Default: 60s) |
| Power-on Delay Time | 2s~10s (Default: 2s) |
| Power Consumption | Less than 2W |
| Electric Machinery Life | 100,000 times |
| Installation | 35mm DIN rail |
| Dimensions (H x W x D) | 85mm x 35mm x 65mm |
| Weight | 0.203 kg |
| Color | White |
| Material | Plastic |
9. User Tips
- Customizing Protection: Take time to understand your connected appliances' typical operating voltage and current. Adjust the protection thresholds (OV, UV, OC) slightly above and below these normal values to provide effective protection without nuisance tripping.
- Recovery Delay: The "Recovery Delay Time" is crucial. Setting it too short might cause rapid on/off cycling during unstable power conditions, which can be harmful to some appliances. A default of 60 seconds is often suitable for most applications.
- Monitoring: Regularly check the voltage and current readings on the display to ensure your electrical system is operating within expected parameters.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your seller directly. Keep your purchase receipt as proof of purchase.
