Lovato - Automatic Transfer Switch | ATL900

The automatic transfer switch controller ATL900 is used for the automatic or manual switching of the load between three lines in accordance with the selected switching logic. It has outputs for the “automatic” and/or “manual” control of contactors or motorised circuit breakers and switches. It can also manage two more control devices as tie breakers or non-priority load management. It has four current inputs for managing switching with power thresholds. The layout and system status are displayed directly on the graphic LCD.

Operational Characteristics:

• Auxiliary supply
  • auxiliary supply voltage: 100…240VAC, 12/24/48VDC.
• Voltage measurement inputs
  • rated voltage Ue: 100…600VAC (L-L).
  • frequency range: 45…65Hz.
• Programmable digital inputs
  • negative inputs.
• Programmable relay outputs
  • 3 each with 1 normally open contact (NO – SPST) rated 12A 250VAC.
  • 3 each with 1 normally open contact (NO/NC – SPST) rated 8A 250VAC.
  • 4 each with 1 changeover contact (NO/NC-SPDT) 8A 250VAC.
  • 1 30VDC 50mA static output.
• Enclosure
  • flush-mount housing: 180x240mm.
  • protection rating: IP65 on front; IP20 on back.

General Characteristics:

• AC and DC supply inputs.
• Measurement inputs for three phase + neutral voltage values; also suitable for 1 and 2 phase lines.
• 4 current measurement inputs.
• 128×112 backlit graphic LCD to display measurements, events and alarms in 8 languages (English, Italian, French, Spanish, German, Portuguese, Polish and Russian).
• Active operating mode indicator LED.
• Viewing of L-L and L-N voltage values of the controlled lines.
• Status viewing of contactors or motorised circuit breakers both via display and LED.
• 6 system layouts available.
• Management of a tie breaker.
• 12 programmable digital inputs.
• 10 programmable relay outputs.
• 1 static output.
• Configuration programming of lines, type of source (line/generator), control and supervision parameters for emergency demand of generating set.
• Possibility of transferring load with closed transition and spontaneous or controlled genset synchronisation.
• Non-priority load management.
• Built-in programmable PLC logic.
• Built-in RS485 communication.
• Event logging.
• Virtual calendar clock (RTC).
• Communication interface via front optical port with CX01 (USB) or CX02 dongle (Wi-Fi).
• Parameter programming via NFC technology and the NFC App.
• Compatible with Synergy supervision and energy management software, Xpress remote control and configuration software and with the Sam1 application for Androids/iOS.
• Modbus-RTU, ASCII and TCP communication protocol.

Control Functions of the Lines:

• Phase sequence and phase loss.
• Minimum and maximum voltage.
• Voltage asymmetry.
• Minimum and maximum frequency.