1. Introduction
The SINOTIMER SVP-916 is an intelligent adjustable voltage protector designed for single-phase AC 230V/120V electrical systems (50/60Hz) with a rated working current of 80A or less. It provides comprehensive protection against over-voltage, under-voltage, and over-current conditions. This device automatically disconnects power to protect connected electrical equipment from damage and restores power once the voltage returns to normal operating parameters. It is ideal for residential household main circuit entry or distribution lines.
2. Safety Information
- Installation and maintenance should only be performed by qualified electricians.
- Ensure the main power supply is disconnected before installation or wiring.
- Verify all connections are secure and correct to prevent electrical hazards.
- Do not operate the device in wet conditions or with damaged wiring.
- This device is designed for AC voltage only. Do not use with DC voltage.
3. Package Contents
Please check the package for the following items:
- 1 × SINOTIMER SVP-916 Adjustable Voltage Protector
- 1 × User Manual
- 1 × Retail Packaging
4. Product Overview and Features
The SVP-916 features a compact, modular design for easy integration into electrical panels. It provides real-time monitoring and protection for your electrical system.
Key Features:
- Dual LED Real-Time Monitoring: Displays current voltage and current simultaneously.
- Ultra-Fast Protection & Smart Recovery: Triggers protection within milliseconds and automatically restores power.
- 13-Level Customization (P01-P13): Adjustable protection parameters for various scenarios.
- 5-Time Fault History (P12): Records the last five fault events for diagnostics.
- Modular Design (2P Compact Size): Occupies two standard DIN rail modules.
- Dual LED Indicators: Separate LEDs for working status (fast-flashing for over-voltage, slow-flashing for under-voltage).
- Easy DIN Rail Installation: Designed for quick and secure mounting.
- Large, Tactile Buttons: For easy parameter adjustment.
Figure 1: SINOTIMER SVP-916 Voltage Protector units, showing available current limits (40A, 63A, 80A).
Video 1: Product demonstration highlighting features, protection mechanisms, recovery, adjustability, fault inquiry, and package contents.
5. Specifications
| Parameter | Value |
|---|---|
| Brand Name | SINOTIMER |
| Model Number | SVP-916 |
| Type | Mini, Adjustable Voltage Protector |
| Rated Voltage | AC 230V/120V |
| Frequency | 50/60Hz |
| Max Load Current | 40A, 63A, 80A (selectable) |
| Over-voltage Protection Range | 221V-300V (Adjustable) |
| Under-voltage Protection Range | 150V-219V (Adjustable) |
| Over-current Protection Range | 1A-63A or 1A-40A (Adjustable based on model) |
| Over-voltage Protection Action Time | 0.1s - 10s (Adjustable, typically 0.1s) |
| Under-voltage Protection Action Time | 0.1s - 10s (Adjustable, typically 0.2s) |
| Recovery Delay Time | 2s - 512s (Adjustable, typically 5s) |
| Power-on Delay Time | 2s - 255s (Adjustable) |
| Display | Dual LED Displays (Voltmeter, Ampmeter) |
| Installation | 35mm DIN Rail (2 Poles) |
| Dimensions (W×H×D) | 36mm × 85mm × 65mm |
| Certification | CE, RoHS, EMC, LVD |
Figure 2: Dimensions of the SVP-916 Voltage Protector.
6. Installation and Setup
6.1 Physical Installation
The SVP-916 is designed for DIN rail mounting. It occupies two standard module slots on a 35mm DIN rail.
- Ensure all power is disconnected from the main circuit breaker.
- Mount the SVP-916 onto the DIN rail in your electrical distribution box.
6.2 Wiring Diagram
Connect the device according to the wiring diagram below. Ensure correct polarity for Line (L) and Neutral (N) connections.
Figure 3: Wiring Diagram for SVP-916, showing connection with power switch and air circuit breaker. Connect the 'IN' terminals to the incoming power supply and 'OUT' terminals to the load.
- IN (Input): Connect the incoming Line (L) and Neutral (N) from your main power source or upstream circuit breaker.
- OUT (Output): Connect the outgoing Line (L) and Neutral (N) to your load or downstream circuit breakers.
- It is recommended to install the voltage protector after a Residual Current Device (RCD/UZO) and before individual circuit breakers. Connect the Neutral (N) from the RCD/UZO to the protector's N-IN terminal, and then to the neutral bus bar from the protector's N-OUT terminal.
6.3 Initial Power-On
After wiring, restore power to the circuit. The device will perform a self-test and then display the current voltage and current. If a power-on delay is configured, the output will be energized after the set delay time.
7. Operation
7.1 Understanding the Display and Indicators
- Upper LED Display: Shows real-time voltage (V).
- Lower LED Display: Shows real-time current (A).
- OV fast (Over-Voltage Fast): Red LED, fast flashing indicates over-voltage protection.
- UV slow (Under-Voltage Slow): Red LED, slow flashing indicates under-voltage protection.
- OC fast (Over-Current Fast): Red LED, fast flashing indicates over-current protection.
- ADJ (Adjust): Green LED, indicates normal operation.
7.2 Setting Parameters (P01-P13)
To enter the setting mode, press and hold the SET button for 3 seconds. Then, repeatedly press SET to cycle through the parameters (P01 to P13). Use the ▲ (Up) and ▼ (Down) buttons to adjust the values. Once all settings are complete, press SET again when 'END' is displayed to save and exit.
| Parameter | Description | Default Value | Adjustment Range |
|---|---|---|---|
| P01 | Over-voltage Protection Value | 280V | 221V-300V-OFF |
| P02 | Over-voltage Recovery Value | 250V | 220V-299V |
| P03 | Over-voltage Protection Action Time | 0.1s | 0.1s-10s |
| P04 | Under-voltage Protection Value | 160V | 150V-219V-OFF |
| P05 | Under-voltage Recovery Value | 180V | 151V-220V |
| P06 | Under-voltage Protection Action Time | 0.1s | 0.1s-10s (Note: If set >0.3s, relay may not trip due to MCU power loss) |
| P07 | Over-current Protection Value | 63A (or 40A) | 1A-63A (or 1A-40A) |
| P08 | Over-current Protection Action Time | 5.0s | 0.1s-512s |
| P09 | Fault Recovery Delay Time | 60s | 2s-512s |
| P10 | Power-on Delay Time | 2s | 2s-255s |
| P11 | Reset Mode Selection | AU (Auto) | AU (Auto Reset) / HA (Manual Reset) |
| P12 | Fault Inquiry Code | IUL | Displays last 5 faults (UL: Under-voltage, UH: Over-voltage, IH: Over-current) |
| P13 | End of Settings | END | Save and Exit |
7.3 Protection and Recovery
- Over-voltage Protection: If the voltage exceeds the P01 setting, the device will trip within the P03 action time. The OV fast LED will flash rapidly.
- Under-voltage Protection: If the voltage drops below the P04 setting, the device will trip within the P06 action time. The UV slow LED will flash slowly.
- Over-current Protection: If the current exceeds the P07 setting, the device will trip within the P08 action time. The OC fast LED will flash rapidly.
- Automatic Recovery: If P11 is set to 'AU', the device will automatically restore power after the voltage/current returns to normal and the P09 (Fault Recovery Delay Time) has elapsed.
- Manual Recovery: If P11 is set to 'HA', the device will remain off after a fault. You must manually press the SET button to restore power once the fault condition is cleared.
7.4 Fault Inquiry (P12)
In setting mode, navigate to P12. The display will show the code for the last fault (e.g., 'IUL' for under-voltage). Press the ▲ button to cycle through the last 5 recorded fault events. Codes are: UL (Under-voltage), UH (Over-voltage), IH (Over-current).
8. Maintenance
- The SVP-916 is designed for maintenance-free operation.
- Keep the device clean and free from dust. Use a dry, soft cloth for cleaning.
- Do not use abrasive cleaners or solvents.
- Periodically check wiring connections for tightness.
9. Troubleshooting
- Device not powering on: Check input voltage and wiring connections. Ensure main power supply is active.
- Device trips frequently: Check if the voltage or current in your system is consistently outside the set protection limits. Adjust parameters (P01, P04, P07) if necessary, or investigate the cause of voltage/current fluctuations.
- Settings are lost after power outage: While settings are generally non-volatile, some users have reported issues. If this occurs, re-enter your desired settings. If the problem persists, it may indicate a defective unit.
- Power-on delay not working: Verify the P10 setting. Ensure no other delay parameters are overriding it. Some users reported immediate power-on despite delay settings; double-check all related parameters.
- Device does not recover automatically: Check P11 (Reset Mode Selection). If set to 'HA' (Manual Reset), you must press SET to restore power.
- Display shows abnormal readings: Ensure connections are secure. If readings are consistently incorrect, the unit may be faulty.
10. User Tips
- For whole-house protection, consider dividing circuits into groups and using appropriate current-rated protectors for each group, rather than relying on a single high-amperage unit for the entire load.
- The dual-color display (green for current) is typically available on 80A models.
- Actual response times can vary slightly from the set value (e.g., 0.5-0.6 seconds for a 0.1-second setting).
- Always install the protector after an RCD/UZO for comprehensive safety.
11. Warranty and Support
SINOTIMER products are manufactured to high-quality standards. For any issues or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt for warranty claims.