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  •  Various monitoring functions selectable < U, > U, < f, > f

  •  Asymmetry, phase failure and phase sequence monitoring

  •  Adjustable start-up delay, response delay and delay on release

  •  Password protection for device setting

  •  Preset function (automatic setting of basic parameters)

Various measuring and monitoring relays are available for the purpose of monitoring electrical quantities. In addition to overvoltage, undervoltage, frequency, unbalance, phase sequence, phase failure and loop monitoring, special solutions for specific applications are also possible: extended temperature ranges, sector-specific standards, compact design, country-specific profiles.


  • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V

  • Asymmetry, phase failure and phase sequence monitoring

  • Different monitoring functions selectable < U, > U, < f, > f

  • Start-up delay, response delay, delay on release

  • Adjustable switching hysteresis r.m.s. value measurement (AC)

  • Digital measured value display via multi-functional LC display

  • Preset function (automatic assignment of basic parameters)

  • LEDs: Power On, Alarm 1, Alarm 2

  • Measured value memory for operating value

  • Continuous self-monitoring

  • Internal test/reset button

  • RoHS-compliant


  • Monitoring of voltage-sensitive machines and electrical installations

  • Switching on and switching off at a certain voltage level

  • Monitoring of stand-by and emergency supply systems

  • Supply voltage monitoring of portable loads

  • Protection of three-phase motors against phase failure and

  • Transformer protection, asymmetrical load can be recognized

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