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Automatic transfer switch controllers ATL 800 and ATL900


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Automatic transfer switch controllers ATL 800 and ATL900



The ATL800 and ATL900 are the new automatic transfer switch controllers designed by LOVATO Electric to cover the high-end applications on power transfer through different power sources.
These new devices complete the range of controller dedicated to the monitoring and supervising of automatic or manual transfers between two sources for ATL800 and three sources for the ATL900.

The user can select the type of source among utility or generator, and the relative transfer equipment, such as contactors, motorized circuit breakers and changeover switches.
These units include all the necessary features to supervise and control power supply sources composed by energy distribution systems or generating sets.
We introduced some new features; the most important are the tie breaker management, the closed transition and, only for the ATL900, three sources and the current inputs.

The utility changeover, from one power source to the other, can be automatic or manual.
The automatic transfer switches takes place whenever conditions predefined by the user take place, for example:

  • Power supply source not respecting programmed limits;
  • The need to have a very reliable power source;
  • The need to use the most economical power source.

The two new controllers provide a double power supply AC/DC and they are expandable on the back with the EXP modules with a maximum of 3 modules each.

The new front panel combines a modern design with a clear and intuitive user interface with a backlight graphic LCD.
The optical USB/Wi-Fi port on front allows communication with PC, smart-phone and tablet without removing power to the electrical panel.
Using the NFC technology it is possible to set up the parameters without touching and “power on” the device.

ATL800 main features:

  • Management of 2 power sources
  • Control of undervoltage, overvoltage, phase loss, asymmetry, minimum and maximum frequency, with time delay and independent enabling
  • Inputs, outputs, limits, counters and alarms are programmable by the user
  • Power sources can be independently defined as utility or generator
  • Automatic test management for standby and rotation generators
  • Suitable for LV and MV systems
  • Programmable maintenance alarms
  • Suitable for contactors, motorised circuit breakers and motorised changeover switches
  • Tie breaker management
  • Closed transition available
  • Customizable change-over devices layout and transfer strategy
  • Built-in NFC technology
  • Dual AC/DC power supply
  • Real time clock with backup energy
  • Expandability with EXP... modules (e.g. Ethernet, extra I/Os).

ATL900 main features:

  • Management of 3 power sources and 3 changeover devices plus 2 tie-breakers
  • Control of under and over-voltage, phase loss, asymmetry, minimum and maximum frequency, each with independent enabling and time delay
  • Inputs, outputs, limits, counters and alarms are programmable by the user
  • Power sources can be independently defined as utility or generator
  • Automatic test management for standby or rotation generators
  • Suitable for LV and MV systems
  • Programmable maintenance alarms
  • Suitable for contactors and motorised circuit breakers
  • 4 current inputs for the three phases and neutral
  • Closed transition available
  • Tie breaker management
  • Built-in NFC technology
  • Dual AC/DC power supply
  • Real time clock with backup energy
  • Expandability with EXP... modules (e.g. Ethernet, extra I/Os).

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