1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the SINOTIMER SVP-915-40A Adjustable Voltage Protector. This device is designed to protect electrical circuits and appliances from damage caused by overvoltage and undervoltage conditions. Please read this manual thoroughly before installation and use to ensure proper functionality and safety.
2. Product Overview
The SINOTIMER SVP-915-40A is an adjustable voltage protection device featuring an HD LCD display for real-time voltage monitoring. It automatically disconnects power when voltage exceeds or falls below user-defined thresholds and reconnects when voltage returns to normal operating levels.
Figure 1: Front view of the SINOTIMER SVP-915-40A Adjustable Voltage Protector. The device features an LCD screen displaying "230V" and three control buttons: SET, Up, and Down, for adjusting parameters.
3. Key Features
- Voltage Protection: Automatically cuts off power to protect connected equipment during overvoltage or undervoltage conditions.
- Automatic Reconnection: Restores power supply automatically once the circuit voltage returns to normal operating range.
- Adjustable Thresholds:
- Overvoltage Protection Range: Adjustable from 221V to 290V.
- Undervoltage Protection Range: Adjustable from 150V to 219V.
- HD LCD Display: Provides clear and easy-to-read real-time voltage values.
- Voltmeter Function: Can be used as a standalone voltmeter to display the actual circuit voltage.
4. Specifications
| Parameter | Value |
|---|---|
| Model | SVP-915-40A |
| Rated Current | 40A |
| Power Source | AC |
| Working Voltage | 230VAC 50/60Hz |
| Overvoltage Protection Range | 221V - 290V (Adjustable) |
| Undervoltage Protection Range | 150V - 219V (Adjustable) |
| Dimensions (L x W x H) | 9.14 x 7.37 x 4.32 cm |
| Weight | 181 g |
Figure 2: Dimensional drawing of the voltage protector, showing its height (85mm), width (36mm), and depth (65mm), along with other side measurements.
5. Installation
Important Safety Notice: Installation should only be performed by a qualified electrician. Ensure the main power supply is disconnected before commencing any wiring work. Failure to do so may result in electric shock or damage to the device.
- Mounting: The device is designed for DIN rail mounting. Securely attach it to the DIN rail within your electrical panel.
- Wiring: Refer to the wiring diagram below.
- Connect the incoming Live (L) and Neutral (N) wires to the "IN" terminals at the top of the protector.
- Connect the outgoing Live (L) and Neutral (N) wires from the "OUT" terminals at the bottom of the protector to your load or downstream circuit breaker.
- Ensure all connections are tight and secure to prevent loose contacts and overheating.
- Verification: After wiring, double-check all connections for correctness and security before restoring power.
Figure 3: Wiring diagram illustrating the connection of the voltage protector between a power switch and an air circuit breaker. The Live (L) and Neutral (N) lines are clearly marked for input and output connections.
6. Operation
Once installed and powered on, the device will display the current voltage on its LCD screen. You can adjust the overvoltage and undervoltage protection thresholds using the control buttons.
- Viewing Current Voltage: The LCD continuously displays the real-time circuit voltage.
- Entering Setting Mode: Press and hold the SET button for approximately 3-5 seconds until the display starts flashing.
- Adjusting Overvoltage Threshold (U>):
- While in setting mode, press the SET button repeatedly to cycle through parameters until "U>" (Overvoltage) is displayed and flashing.
- Use the Up (▲) and Down (▼) buttons to adjust the desired overvoltage protection value (221V-290V).
- Adjusting Undervoltage Threshold (U<):
- Press the SET button again to cycle to "U<" (Undervoltage).
- Use the Up (▲) and Down (▼) buttons to adjust the desired undervoltage protection value (150V-219V).
- Saving Settings: After adjusting all desired parameters, wait for approximately 5-10 seconds without pressing any buttons. The device will automatically save the settings and exit the setting mode.
- Manual Reset: In case of a voltage fault, the device will trip. Once the voltage returns to normal, it will automatically reconnect. If manual intervention is required, power cycle the device.
7. Maintenance
The SINOTIMER SVP-915-40A is designed for minimal maintenance. Follow these guidelines to ensure optimal performance and longevity:
- Regular Inspection: Periodically inspect the device and its wiring for any signs of damage, loose connections, or discoloration.
- Cleaning: Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Environmental Conditions: Ensure the device is operated within its specified environmental conditions (temperature, humidity) to prevent malfunction.
- Professional Check: If you suspect any malfunction or damage, consult a qualified electrician for inspection and repair. Do not attempt to repair the device yourself.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | No input power; incorrect wiring; internal fault. | Check main power supply. Verify wiring connections according to the diagram. If problem persists, consult a qualified electrician. |
| Device trips frequently. | Voltage fluctuations in the circuit; protection thresholds set too narrow. | Monitor circuit voltage to confirm fluctuations. Adjust overvoltage/undervoltage thresholds slightly wider if necessary, ensuring they remain within safe limits for your appliances. |
| LCD display is blank or erratic. | Power issue; internal display fault. | Check power supply. Power cycle the device. If the issue continues, the device may require professional inspection. |
| Cannot adjust settings. | Not in setting mode; buttons malfunctioning. | Press and hold the SET button for 3-5 seconds to enter setting mode. If buttons are unresponsive, the device may be faulty. |
9. Safety Information
- Always disconnect the main power supply before installing, wiring, or performing any maintenance on the device.
- This device is intended for indoor use in dry environments. Do not expose it to water, moisture, or extreme temperatures.
- Ensure proper grounding where applicable and follow all local electrical codes and regulations.
- Do not exceed the maximum rated current of 40A.
- Keep out of reach of children.
- If the device is damaged or malfunctions, discontinue use immediately and seek professional assistance.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your retailer. Keep your purchase receipt as proof of purchase.
