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Voltage Window Comparators (1-phase or 3-phase)
Rhomberg voltage window comparators, are used to monitor AC (1-ph or 3-ph) or DC power supply voltages, and switch a relay contact at a pre-determined level, primarily used for overvoltage and/or undervoltage protection of equipment connected to that power supply. (Available in 11-pin plug-in or DIN rail format)


AP221 Single Phase Supply Monitoring Relay- Voltage Window Comparator AC/ DC
Overvoltage and/or Undervoltage monitoring of power supply




Features
  • DIN rail mount.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring.
  • Monitoring of own supply voltage (single phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Separately adjustable response times on trip & recovery (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Adjustable start-up delay for disabling latching 0.1 to 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 5A DPDT relay output.
  • Supersedes P220P
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AP224 Single Phase Supply Monitoring Relay- Voltage Window Comparator AC/ DC
Overvoltage and/or Undervoltage monitoring of power supply (2 Independent Relay Outputs)




Features
  • DIN rail mount.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring.
  • Monitoring of own supply voltage (single phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Separately adjustable response times on trip & recovery (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Adjustable start-up delay for disabling latching 0.1 to 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 2 x 10A SPDT relay outputs (1 for Overvoltage, 1 for Undervoltage)
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AP231/AP232 3 Phase Supply Monitoring Relay- Voltage Window Comparator
Overvoltage and/or Undervoltage monitoring of power supply




Features
  • AP231 monitors 3 Phases only, AP232 monitors 3 Phases and Neutral
  • Protection of phase failure & incorrect phase sequence
  • DIN rail mount.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring with phase failure or sequence detection
  • Monitoring of own supply voltage (3 phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Separately adjustable response times on trip & recovery (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Adjustable start-up delay for disabling latching 0.1 to 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 10A SPDT relay output.
  • AP231 Supersedes P230P.
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AP234/AP235 3 Phase Supply Monitoring Relay- Voltage Window Comparator
Overvoltage and/or Undervoltage monitoring of power supply (2 Independent Relay Outputs)




Features
  • AP234 monitors 3 Phases only, AP235 monitors 3 Phases and Neutral
  • Protection of phase failure & incorrect phase sequence
  • DIN rail mount.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring with phase failure or sequence detection
  • Monitoring of own supply voltage (3 phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Separately adjustable response times on trip & recovery (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Adjustable start-up delay for disabling latching 0.1 to 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 2 x 10A SPDT relay outputs (1 for Overvoltage, 1 for Undervoltage)
  Data Sheet   More Info   Order Code
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SP221 Single Phase Supply Monitoring Relay- Voltage Window Comparator AC/ DC
Overvoltage and/or Undervoltage monitoring of power supply




Features
  • 11-pin plug-in.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring.
  • Monitoring of own supply voltage (single phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Adjustable response time on trip (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Fixed start-up delay for disabling latching 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 10A SPDT relay output.
  • Supersedes SP220.
  • Requires optional S3-B 11-pin base.
  Data Sheet   More Info   Order Code
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SP231/SP232 3 Phase Supply Monitoring Relay- Voltage Window Comparator
Overvoltage and/or Undervoltage monitoring of power supply




Features
  • SP231 monitors 3 Phases only, SP232 monitors 3 Phases and Neutral
  • 11-pin plug-in.
  • Fail-to-safe design.
  • Combined overvoltage and undervoltage monitoring.
  • Monitoring of own supply voltage (3 phase).
  • Separately adjustable setpoints: over-voltage, (5 to 20%) and, under-voltage (-5 to -20%).
  • Adjustable response time on trip (0.1 to 10 seconds).
  • Fixed hysteresis: 2%.
  • Fixed start-up delay for disabling latching 10 sec.
  • Selectable latching (ie manual or auto reset).
  • LED indication of Relay ON and fault type.
  • 10A SPDT relay output.
  • Supersedes SP230.
  • Requires optional S3-B 11-pin base.
  Data Sheet   More Info   Order Code
Product Comparison | Search | Top