Automatic Transfer Switching Controller
ATS-3 controller is dedicated to automatic switching of back-up incoming feeder and automatic recover of main incoming feeder in LV switchgears. Automatic transfer switching controllers are basic devices which ensure high level of service security. The AZR-3 is dedicated for switchgear of three-circuit-breakers topology. In case of outage, the feeder where it occured is automatically switched off and simultanously, the CB in coupling bay is switched on. Annonciuator panel provides the staff neccesary information about current status in precise and quick way. The device serves as the event recorder too. Recorded data can be transfered to SCADA system via fiber-optic port, RS485 port or Ethernet. The available communication protocols are: „ZEG”, IEC 60870-5-103 and (optionally) MODBUS or DNP-3.

Manuals, diagrams, technical details


Product description

Main features

  • flush-mounted enclosure of dimensions 144/144/141 mm
  • 16 binary inputs – fully configurable
  • 8 measuring inputs with voltage unbalance detection
  • 16 relay outputs in order to control circuit-breakers or to signalling purposes
  • 3,5 inch LCD display (mimic diagram, settings, configuration, control)
  • 8 RGB LED diodes – fully configurable
  • lack of auxilliary voltage or supply module failure signalled by NC watchdog contact
  • back-up auxilliary voltage by additonal supply module
  • input/output modules eqiupped with plug-in connectors with screw flanges
  • ALARM TEST button in order to test of alarm outputs proper operation
  • 4 communication ports: 2 x RS485, 1 x fiber-optic ST, USB
  • programmable selection of communication protocol: IEC 60870-5-103, ZEG


Rated supply voltage 110-230V DC/AC
or other on request
Burden in supply module <25VA
No. of inputs 24
Insulation optical
Inputs rated voltage 220V DC/AC
or other on request
Burden in binary inputs 0,3W
Settable time delay 25s
Time resolution 1ms
No. of communication ports 4
Weight 2kg
Ambient temperature -5÷+40°C

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