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TOMZN Din Rail Adjustable Over/Under Voltage Protector Relay

Professional Voltage & Current Safeguard | Automatic Recovery | Digital Real-Time Display

The TOMZN TOVPD1 Series is a high-performance protective relay designed to shield your electrical appliances and home circuits from unstable power conditions. Mounted easily on a standard 35mm DIN rail, this device acts as a smart "gatekeeper," automatically disconnecting power when voltage or current exceeds safe limits and restoring it once the grid stabilizes.

Key Product Functions

Over-Voltage Protection: Prevents damage from power surges by cutting off the circuit when voltage exceeds your set limit ( $230\text{V} – 300\text{V}$ ).
Under-Voltage Protection: Shields motors and compressors (like those in fridges or ACs) from burning out during brownouts or low-voltage dips ( $140\text{V} – 210\text{V}$ ).
Over-Current Protection: Acts as a smart circuit breaker, preventing wire overheating and fire hazards by monitoring real-time load.
Automatic Recovery: Once power conditions return to normal, the device automatically reconnects the circuit after a customizable delay, eliminating the need for manual resets.
Digital Dual Display: Features a clear, real-time LED readout for both current Voltage (V) and Current (A), doubling as a digital power meter.
Voltage Calibration: Includes an A13 calibration setting to ensure your readings are perfectly synced with your local grid.

Model Comparison: Intelligent Series

Please note the functional differences between our Smart-enabled models:

Feature	TOB9L-63 (2P)	TOB9-63 (1P)
Circuit Cut-off	Both Live (L) and Neutral (N)	Live (L) Only
Leakage Protection	Yes	No
Temp Control	No	Yes

Technical Parameters

Feature	Specification
Model Number	TOVPD1-60-VA
Power Supply	230VAC 50/60Hz
Max Loading Options	40A / 63A Adjustable
Power Consumption	< 2W
Mechanical Life	100,000 Cycles
Installation	35mm DIN Rail

Adjustable Set-Points (Factory Defaults)

Over-Voltage: Range $230\text{V} – 300\text{V}$ (Default: 270V)
Under-Voltage: Range $140\text{V} – 210\text{V}$ (Default: 170V)
Over-Current: Range $1\text{A} – 63\text{A}$ (Default: 40A)
Action Time: Instant protection in as little as 0.5s.
Recovery Delay: Standard 30s delay to protect sensitive electronics from rapid "on-off" cycling.

Installation Guide

Mounting: Clip the device onto a standard 35mm DIN rail inside your distribution box.
Wiring: Connect the Incoming Power to the IN terminals and the Home Load to the OUT terminals. Ensure connections are tight to prevent arcing.
Programming: Use the front buttons to navigate the menu and set your preferred protection thresholds based on your local electrical standards.