Socomec ATyS 1200A 

The Socomec ATyS 1200A 3‑Pole 600V Automatic Changover Switch is a high‑performance, industrial‑grade power transfer solution designed to ensure continuous and reliable electrical supply in critical systems. Built by Socomec, a global leader in power switching and continuity solutions, the ATyS series provides seamless transition between power sources — such as utility mains and backup generators — without manual intervention, helping to safeguard essential equipment and processes from unexpected outages.

Rated for up to 1200 A and 600 V, this three‑pole automatic transfer switch is ideal for 3‑phase electrical systems without a neutral conductor. Its three‑pole configuration enables efficient switching of the three live phases, making it well‑suited for industrial, commercial, and critical power applications where uninterrupted operation is vital. Whether deployed in factories, commercial buildings, data centers, or infrastructure facilities, the ATyS 1200A offers dependable performance under demanding electrical load conditions.

At the core of the ATyS 1200A is its intelligent automatic changeover logic. The unit continuously monitors the primary (utility) and secondary (backup) power sources voltage and frequency. When the primary source experiences a fault, drop, or loss of supply, the switch automatically transfers the load to the backup source with configurable delay settings to ensure stability. Once the primary supply returns within acceptable parameters, the ATyS reverses the process and restores the load, maintaining proper power continuity with minimal interruption.

Designed for reliability and longevity, the ATyS 1200A features a robust mechanical and electrical structure capable of handling frequent switching operations with minimal maintenance. Integrated safety and control features — such as interlocks, status indication, and remote signaling options — help operators monitor and manage power states effectively. The switch can also be operated manually if needed for testing, maintenance, or special operational scenarios.

With its compact design for panel integration and compatibility with automation or building management systems, the Socomec ATyS 1200A provides a flexible and efficient power transfer solution for critical electrical systems. Its combination of automatic switching, durability, and advanced control logic makes it a trusted choice for ensuring safety, reliability, and uninterrupted power in any demanding environment.

Technical Specifications

General

• Product Name: Socomec ATyS 1200A Automatic Changover Switch

• Type: Automatic Transfer Switch (ATS)

• Model Rating: 1200 A

• Pole Configuration: 3‑Pole (three phases, no neutral)

• Application: Automatic changeover between two power sources (utility mains and backup/alternate supply)

Electrical Ratings

• Rated Operational Voltage (Ue): Up to 600 V AC (three‑phase)

• Rated Current (In): 1200 A continuous

• Rated Frequency: 50 Hz / 60 Hz

• Utilization Category: Suitable for switching resistive and inductive loads

• Short‑Time Withstand Capability: Designed to withstand high short‑circuit currents when used with appropriate upstream protection

Switching & Control

• Automatic Mode:
  • Continuous monitoring of source voltage and frequency
  • Automatic load transfer upon detection of primary source loss or instability
  • Configurable transfer and re‑transfer delay settings

• Manual Mode:
  • Manual changeover via handle or control panel available for testing and maintenance

• Changeover Logic: Intelligent controller with automatic switching logic

• Interlocks: Electrical/mechanical interlocks to prevent unsafe switching

Protection & Safety

• Safety Features:
  • Interlocks to prevent simultaneous connection of both sources
  • Phase monitoring to detect under/over‑voltage conditions
  • Fault indication and status signaling

• External Protection:
  • External circuit breakers or fuses recommended for overcurrent and short‑circuit protection

Mechanical & Physical

• Enclosure: Robust industrial housing suited for switchgear or panel integration

• Mounting: Designed for mounting within electrical distribution panels

• Contact Type: Heavy‑duty power contacts for frequent switching

• Actuation: Electrically driven switching mechanism with control feedback

Control & Interface

• Status Indication:
  • Primary and secondary source availability indicators
  • Load position and transfer status
  • Fault and warning indication

• Auxiliary Contacts: Provided for remote monitoring and integration with PLC or building management systems

• Remote Control Capability: Allows connection to external control/supervisory systems

Environmental

• Operating Temperature: Typical industrial range suitable for indoor use

• Storage Temperature: Broader range for non‑operational conditions

• Humidity: Designed to operate in non‑condensing industrial humidity environments

• Altitude: Suitable for standard installation altitudes (derating may apply above certain heights)

Standards & Compliance

• Designed in accordance with applicable industrial standards for automatic transfer switches and electrical safety in low‑voltage power distribution systems.

Typical Use Cases

• Automatic load transfer for backup generator systems

• Ensuring power continuity in commercial buildings and industrial plants

• Integration into automation systems for controlled power switching

• Critical infrastructure such as data centers, healthcare facilities, and utilities