Automatic Transfer Switch (ATS) Controller for Generator | 220V | 3 Phase | Automatic Mains–Generator Control

Technical specifications

Product type: ATS controller
Application: diesel generators
Power supply: 220V AC
Grid monitoring: 3-phase, 4-wire (3P+N)
Generator: single-phase voltage monitoring
Output type: relay (NO/NC contacts)
Contact rating: 16A AC250V
Generator start output: 16A AC250V
Timing settings: grid recovery delay: 1–60 s, generator stabilization delay: 1–60 s
Indication: LED status indicators
Protection functions: voltage drop, phase loss
Construction: modular, ABS plastic (self-extinguishing)
Mounting: DIN rail (35 mm), screw mounting
Connection: plug-in terminals
Working environment: resistant to electromagnetic interference

Functions

Automatic grid–generator switching (ATS) – automatically switches power between grid and generator
Automatic generator start – sends signal to start generator when grid fails
3-phase grid monitoring (3P+N) – continuously monitors voltage in all phases
Phase loss detection – reacts if at least one phase is lost
Undervoltage control – protects against too low voltage
Adjustable delay times (1–60 s) – allows setting switching times according to the system
Automatic return to grid – returns to normal mode when voltage is restored
LED status indication – clearly shows operating mode and status
Control contact outputs (NO/NC) – allows control of contactors or ATS mechanism
Universal mounting (DIN / screws) – easy integration into various panels

Application

For household users: Backup generator control in private houses, automatic power restoration during outages, protection against power supply failures (heating, refrigerators, alarm systems)
In industry / for engineers: Continuous power supply for production lines, server rooms, data centers, critical infrastructure (hospitals, pumping stations, warehouses)
For electricians: ATS panel assembly, generator system integration, reliable solution for customers requiring automatic switching

Practical use

At home with a generator – automatically starts the generator and switches power when electricity fails, ensuring heating, refrigerators, and alarms operate without interruption.
In industry and business – ensures uninterrupted operation of equipment (production lines, servers, pumping stations).
In electrical panels (ATS systems) – used as a controller managing contactors and the entire switching logic.

Advantages

Fully automatic operation
Reliable monitoring of grid parameters
Adjustable operating times
Suitable for both small and larger installations
Resistant to electromagnetic interference
Easy installation and connection

Disadvantages

Requires additional ATS power components (contactors / switches)
No advanced communication (Modbus, etc.)
Requires proper professional installation

Is this a complete ATS switch?

No, this is an ATS controller that controls contactors or switching mechanisms.

Is it suitable for a three-phase grid?

Yes, it supports 3-phase (3P+N) grid monitoring.

Does it start the generator automatically?

Yes, it has a generator start function (START signal).

Can the delay be adjusted?

Yes, from 1 to 60 seconds for both grid and generator.

Is it suitable for home use?

Yes, it is suitable for private houses with a generator.