Automatic Dual-Power Switching – Seamlessly transfers electrical load between two power sources (e.g., grid and backup generator/inverter) for continuous power without user action.
Fast Switching Time – Quickly changes over in less than 50 ms, minimizing disruption to connected equipment.
4-Pole 3-Phase Design – Handles all three phases plus neutral, ensuring balanced and complete switching for three-phase systems.
Multiple Current Ratings (63A/100A/125A) – Available in different rated current options to suit a range of load requirements.
High Surge Withstand (8 kV) – Built-in impulse withstand protects against transient voltage spikes during switching events.
PC-Level Reliability Construction – Designed for stable automatic switching without generating dangerous short-circuit currents, protecting circuits and appliances.
Wide Operating Range – Works reliably within ≈85 % to 110 % of rated voltage, accommodating minor voltage variations in supply.
DIN-Rail Mountable – Standard DIN-rail installation makes it easy to mount in electrical panels and distribution boards.
Durable Mechanical & Electrical Life – Built to last thousands of automatic switching cycles for long-term use.
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The TOMZN TOQ7-4P 3-Phase Automatic Transfer Switch (ATS) is a reliable dual-power electrical selector switch designed to automatically transfer load between two AC power sources (such as utility/grid and backup generator or alternate supply) in three-phase systems, ensuring continuous and stable power supply without manual intervention. Built with PC-level reliability, it features fast switching (typically < 50 ms) and high impulse voltage withstand (up to ~8 kV) for enhanced surge resistance, helping protect connected equipment from power disruptions and voltage spikes. The unit supports multiple rated current options (63 A / 100 A / 125 A) to match various load demands and is DIN-rail mountable for easy installation in panels and electrical enclosures, making it ideal for industrial, commercial, and critical backup power applications where uninterrupted power is essential.
| Specification | Details |
|---|---|
| Model / Type | TOMZN TOQ7-4P 3-Phase Dual Power Automatic Transfer Switch (ATS) |
| Pole Configuration | 4-Pole (L1, L2, L3 + N) — for three-phase systems |
| Rated Supply Voltage (Us) | AC 220 V – 240 V control voltage (typically for sensing) |
| Working Voltage Range | ≈ 85 % Us – 110 % Us (operates within normal grid variation) |
| Rated Current Options | 63 A / 100 A / 125 A depending on model |
| Rated Impulse Withstand Voltage | 8 kV — protects against transient surges |
| Switching Time | < 50 ms — fast automatic transfer between sources |
| Action (Response) Time | < 50 ms — detects source failure and responds quickly |
| Frequency | 50 Hz / 60 Hz — compatible with standard mains frequencies |
| Electrical Life | ~2,000 cycles — durable switching performance |
| Mechanical Life | ~5,000 operations — long mechanical endurance |
| Mounting | DIN-Rail installation for panel/electrical cabinet |
| Typical Application | Automatic switching between grid and backup power for three-phase loads; ensures continuity of power supply |
Over-Voltage Protection – Cuts power if voltage exceeds the safe set level.
Under-Voltage Protection – Shuts off supply when voltage drops below the safe limit.
Over-Current Protection – Protects circuits from excessive current draw.
Automatically Recovers – Restores power once voltage/current returns to safe range.
Real-Time Voltage & Current Display – Built-in display shows live voltage and current.
Adjustable Settings – You can set over-voltage, under-voltage, and over-current thresholds.
Memory of Settings – Remembers your set values even after power loss.
DIN-Rail Mountable – Easy installation in distribution panels.
Dual Power Manual Transfer Switch (MTS) – Allows you to manually switch between two AC power sources (e.g., main grid and backup generator).
1P + 1P Configuration – Uses two single-pole modules—one for each power source—ideal for single-phase systems.
Built-in Circuit Breaker (MCB) – Provides overload and short-circuit protection during power source switching.
Safety Interlocking System – Prevents both power sources from being connected at the same time to avoid back-feeding and electrical hazards.
Manual Operation – Simple, user-controlled switching between power supplies without automated control.
Wide Frequency Support: Works with 50 Hz / 60 Hz AC systems.
Single-Phase Compatibility – Best for homes, small businesses, and backup power setups.
2-Pole AC Circuit Breaker — Protects two lines in an AC electrical circuit.
Voltage Rating: Works at 230/400 V AC with 50/60 Hz frequency, suitable for standard power systems.
Current Ratings Available: From 6 A up to 63 A — choose based on your load requirement.
C-Type Trip Curve: Designed to trip on overloads and short circuits, and handle temporary current spikes (e.g., motors, lights).
Overload & Short-Circuit Protection: Automatically disconnects the circuit to prevent electrical damage and hazards.
Compact & Durable Design: Lightweight, built with fire-resistant and shock-resistant plastic, and easy to install on a DIN rail.
Standards Compliance: Meets international safety standards like IEC 60898 & IEC 60947 for reliable performance.
Smart WiFi Control – Remotely turn the breaker ON/OFF from anywhere using the Smart Life / Tuya app on your phone.
Energy Monitoring (kWh) – Measures and reports real-time energy usage, including voltage, current, and power, so you can track consumption and manage bills.
Scheduling & Timer Functions – Create timers, schedules, and loop timers for automatic circuit control.
Built-In Protection – Offers over-voltage, under-voltage, and over-current protection settings to safeguard connected devices.
Wide Operating Range – Works with AC 90–300 V (50/60 Hz) supply and supports 63 A load capacity (adjustable).
Last State Memory – Remembers the previous ON/OFF status after a power outage.
Durable & Reliable – Designed for over 100,000 mechanical operations and –25 °C to +70 °C operating temperature.
Real-Time Voltage & Current Metering – Displays voltage, current, and power values in the app.
Voice Assistant Ready – Works with Google Assistant & Alexa via the Tuya/Smart Life platform (depending on app setup).
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