TOMZN TOSVA-16LM Adjustable Voltage and Current Protector Extension Socket

1. Safety Information

Warning:

• To avoid danger of suffocation, keep the packaging bag away from babies and children. Do not use this bag in cribs, beds, carriages, or playpens. This bag is not a toy.
• Do not place the device near flammable materials.
• Ensure adequate ventilation during operation.
• Disconnect from power and store properly when not in use for extended periods.
• After receiving the product, it is recommended to have an electrical professional perform the initial operation and connection.

This product complies with the following applicable regulations and harmonized standards:

• Low Voltage Directive 2014/35/EU
• Electromagnetic Compatibility Directive 2014/30/EU
• Restriction of the use of certain hazardous substances (RoHS) Directive 2011/65/EU

2. Product Overview

The TOMZN TOSVA-16LM is an adjustable multifunctional protective extension socket designed to safeguard electrical equipment from power fluctuations. It integrates over-voltage, under-voltage, over-current, and leakage protection, automatically cutting off power to prevent damage.

Key Features:

• Protection Functions: Over-voltage, Under-voltage, Over-current, and Leakage protection.
• Automatic Recovery: Automatically restores power after a fault condition returns to normal.
• Adjustable Parameters: Protection values for voltage, current, and leakage are user-adjustable.
• Real-time Display: Shows voltage, current, kilowatt, power factor, frequency, kilowatt-hour, and prepaid power value.
• Configurations: Available in models with 3 AC Outlets + 2 USB + 1 Type-C, or 4 AC Outlets.
• Safety Design: High temperature flame retardant (750°C) PP material, overload protection, one-piece plug design, CE certified, and child safety features (75N resistance).
• Durable Construction: Features HO5VV-F 3*1.5MM2 FULL COPPER cable with 50% increased core thickness for better conductivity and over 100,000 electrical and mechanical cycles.
• Fast Response: Current-limit guardian instantly cuts power in 0.1 seconds during overloads.

3. Specifications

4. Setup

4.1 Initial Installation

1. It is recommended to have an electrical professional perform the initial connection and operation.
2. Connect the equipment in accordance with the wiring diagram specifications (refer to the full PDF manual for detailed diagrams).
3. Adjust the equipment parameters as needed (refer to Section 5.2 for detailed settings).

4.2 Networking Steps (Tuya App)

For smart monitoring and control, you can connect the device to the Tuya Smart app:

1. Download the App: Scan the QR code below or search for "Tuya Smart" in your mobile app store (e.g., App Store, Google Play) and download the application.



2. Add Device: Open the Tuya Smart app. Click on "Add Device" to begin the pairing process.
3. Discover and Connect: The app will search for nearby devices. Ensure your protector is powered on and in pairing mode (often indicated by a flashing Wi-Fi light). Once discovered, click "Add" to proceed.
4. Enter Wi-Fi Information: Enter your Wi-Fi network name and password when prompted.
5. Confirmation: The app will confirm once the protector is successfully added.
6. Operation Interface: You can now access the mobile phone operation interface to monitor and control your device.

5. Operating Instructions

5.1 Panel Indicator Lamps and Keys

1. Over/Under-voltage alarm indicator: Lights up when voltage is outside safe limits.
2. Over-current alarm indicator: Lights up when current exceeds safe limits.
3. Leakage alarm indicator: Lights up when leakage is detected.
4. WIFI indicator: Shows Wi-Fi connection status.
5. Power indicator: Indicates the device is powered on.
6. Manual switch: Press to manually turn the power on/off.
7. Set key: Long press for 3 seconds to enter the setting interface.
8. Adjustment key + (Up): Used to increase values in settings. Long press for 3 seconds to test leakage.
9. Adjustment key - (Down): Used to decrease values in settings. Long press for 3 seconds to configure Wi-Fi.

5.2 Product Settings

To enter the setting interface, long press the SET key for more than 3 seconds. Use the UP and DOWN keys to adjust values. Press SET again to save and move to the next parameter, or long press SET to save and exit.

• P1 (Power-on delay time S): 1-999 seconds (Default: 10s)
• P2 (Display interval delay time S): 1-999 seconds (Default: 10s)
• UH (Over-voltage protection value V): 230-300V (Default: 270V)
• Ur (Over-voltage recovery value V): 225-295V (Default: 265V)
• Ut (Over-voltage recovery delay time S): 1-999 seconds (Default: 30s)
• UL (Under-voltage protection value V): 140-210V (Default: 170V)
• ULr (Under-voltage recovery value V): 145-215V (Default: 175V)
• ULt (Under-voltage recovery delay time S): 1-999 seconds (Default: 30s)
• CH (Over-current protection value A): 1-16A (Default: 16A)
• CHt (Over-current recovery delay time S): 1-999 seconds (Default: 30s)
• CC (Continuous over current faults times): 1-20 times (Default: OFF)
• LC (Leakage protection value mA): 10-99mA (Default: 30mA)
• LCt (Leakage recovery delay time S): 1-999 seconds (Default: 30s)
• LCC (Continuous leakage faults times): 1-20 times (Default: OFF)
• VAd (Voltage calibration %): -20 to +20%
• CAd (Current calibration %): -20 to +20%
• PAd (Kilowatt calibration %): -20 to +20%
• CEt (Low credit energy warning threshold kWh): 0-50 kWh

To restore factory settings, press the DOWN button for more than 12 seconds.

5.3 Screen Display Description

The screen cycles through various parameters to provide comprehensive monitoring:

• Voltage (V) and Current (A): Real-time voltage and current readings.
• Kilowatt (kW): Instantaneous power consumption.
• Power Factor (COSΦ): Power factor of the connected load.
• Frequency (Fr): Line frequency (e.g., 50.0 Hz).
• Kilowatt-hour (kWh): Accumulated energy consumption.
• Prepaid Power Value: If configured, displays remaining prepaid power.

6. Maintenance

• Keep the device clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
• Ensure proper ventilation around the device to prevent overheating.
• Regularly check the cable and plug for any signs of damage.
• When not in use for extended periods, disconnect the device from the power outlet.

7. Troubleshooting

7.1 Protection Status Displays

• Over-voltage Protection: When over-voltage occurs, the protector automatically disconnects. The display will show "HU" (flashing), then the actual over-voltage value. The over-voltage alarm indicator will be on. Once the voltage returns to normal, the protector resets automatically within the set recovery time.



• Under-voltage Protection: When under-voltage occurs, the protector automatically disconnects. The display will show "LU" (flashing), then the actual under-voltage value. The under-voltage alarm indicator will be on. Once the voltage returns to normal, the protector resets automatically within the set recovery time.
• Over-current Protection: When over-current occurs, the protector automatically disconnects. The display will show "HA" (flashing), then the actual over-current value. The over-current alarm indicator will be on. Once the current returns to normal, the protector resets automatically within the set recovery time. If continuous over-current faults reach the set number of times, the protector will not reset automatically and requires a manual reset by pressing the power key.



• Leakage Protection: When leakage is detected, the protector automatically disconnects, and the leakage alarm indicator turns on, showing the leakage value. If continuous leakage faults reach the set number of times, the protector will not reset automatically and requires a manual reset by pressing the power key.

7.2 General Troubleshooting

• No Power/Display: Check if the protector is securely plugged into a working power outlet.
• Wi-Fi Connection Issues: If the Wi-Fi indicator is not behaving as expected, long-press the Wi-Fi key (Adjustment key -) for 3 seconds to reconfigure the Wi-Fi connection.

8. User Tips

• Plug Spacing: Be mindful when using plugs with thick pins. If two adjacent sockets are occupied by thick plugs, there might not be sufficient space or contact for a thin plug in the third socket.
• No Dedicated On/Off Button: This device is designed as an automatic protector. While it lacks a traditional power strip on/off switch, the manual switch button on the panel serves to manually cycle the power.
• Display Behavior: The digital display typically cycles between showing voltage and amperage. This is normal operation.
• USB/Type-C Charging: Some users have noted potential ripple noise at the USB and Type-C connectors. Additionally, while some ports might be labeled 10W, testing suggests all charging ports are capable of 20W output.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly.

For additional details and comprehensive instructions, please refer to the official user manual PDF.