Busbar protection

Voltage Relay VR-100

  • numerical multifunctional relay for low and medium voltage busbar monitoring
  • used for generator and transformer monitoring and protection against unallowed voltage and frequency changes
  • overvoltage and/or undervoltage protection, overfrequency and/or underfrequency protection
  • phase and line voltage measurements shown on alphanumeric LCD
  • residual voltage Uo measurement
  • high measurement accuracy (true RMS)
  • events recording with time stamps
  • RS485, FO or Ethernet communication. MODBUS RTU(TCP), PROFIBUS protocols
  • selftest function, local and remote availability signalling
  • protection trip signalling on bi-colour LED indicators

Voltage Relay VR-50

  • numerical multifunctional relay for low and medium voltage busbar monitoring
  • used for protection of renewable energy sources connection to the grid
  • overvoltage and/or undervoltage protection, overfrequency and/or underfrequency protection
  • enables the selection of additional vector shift detection function in order to prevent the islanding operation of the renewable source
  • high measurement accuracy (true RMS)
  • events recording with time stamps
  • RS485 or FO communication with a master system
  • alphanumeric LCD with 2×8 characters and backlight for measurements, registered values and parameters display
  • selftest function, local and remote availability signalling
  • protection trip signalling on bi-colour LED indicators
  • small dimensions, 35 mm rail mounting
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