ABB ATS022 Automatic Transfer Switch

The ABB ATS022 is an automatic transfer switch controller designed for use in emergency and standby power systems. It continuously monitors the availability of the mains (utility) supply and, in the event of a failure, automatically initiates the start of a standby generator and transfers the load to the generator once it is stable. When mains power is restored, the ATS022 transfers the load back and allows the generator to cool down before stopping it. This ensures uninterrupted power supply to critical loads.

Key Features

• Voltage and frequency monitoring: Three-phase monitoring of mains and generator with adjustable thresholds.

• Generator start/stop control: Relay output for generator start command.

• Load transfer control: Controls motorized or contactor-based transfer switches.

• Programmable timers: Delay timers for generator start, transfer, retransfer, and generator cool-down.

• Display and indicators: LCD display shows voltages, status, and alarms; LEDs indicate system state.

• Manual mode: Allows manual operation via pushbuttons for testing and maintenance.

Operating Modes

• Automatic: Normal operation; controller monitors mains and automatically transfers to generator when mains fails.

• Manual: User can manually operate the transfer switch via panel buttons.

• Test: Simulates mains failure to test generator and transfer operation without disconnecting load.

• Stop/Reset: Resets alarms and stops generator.

Technical Specifications

• Power supply: 24V DC or 110-240V AC (depending on model).

• Input voltage sensing: 3-phase + neutral, up to 690V AC (via PT or direct).

• Output relays: 5 relays (form C) for generator start, load transfer, and alarms.

• Communication: Optional Modbus RTU or Ethernet for remote monitoring.

• Operating temperature: -20°C to +70°C.

• Mounting: Panel mount, 96 x 96 mm (DIN 43700).

• Protection: IP54 front panel.

Applications

• Emergency power systems in hospitals, data centers, airports.

• Industrial plants with critical processes.

• Commercial buildings (shopping malls, offices).

• Telecommunication towers and base stations.

• Marine and offshore installations.

Standards and Certifications

• IEC 60947-6-1 (Transfer switching equipment).

• UL 1008 (pending).

• CE, CCC, and EAC certified.

The ABB ATS022 automatic transfer switch provides reliable and intelligent control for backup power systems, ensuring that critical loads are always powered, whether from the mains or a standby generator.