E. Dold & Söhne GmbH & Co. KG

Tel.: +49 7723 654-0
E-Mail: dold-relays@dold.com

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RP 9800

Voltage and frequency monitor

RP 9800


Time delay

Supply voltage


  • 0062263
  • RP9800.12 3/N AC400/230V tw=90S
The RP 9800 monitors the voltage of the 3 phases against neutral indicating over and... more

Product description

The RP 9800 monitors the voltage of the 3 phases against neutral indicating over and undervoltage. The phase with the highest voltage (overvoltage) and the phase with the lowest voltage (undervoltage) will cause the relay to switch. The unit is calibrated to the mean RMS value.

Technical specifications

Width: 70 mm
1- / 3-phase: 3
Supply voltage: 3/N AC 315/182, 3/N AC 300/173, 3/N AC 400/230 V
Auxiliary voltage: Without
Operate delay: Yes
Output contacts: 2 C/O contacts
Enclosure design: Distribution board
Type: RP 9800


  • According to DIN EN 60255-1, DIN EN 60947-1
  • Voltage and frequency monitoring for generator sets >30 kVA on public grid, according to VDEW directive
  • RP 9800: 3-phase voltage measurement to neutral
  • Disconnection on rise and drop of voltage
  • Disconnection on rise and drop of frequency
  • Disconnection when 10 minute mean value differs to nominal voltage (overvoltage)
  • Frequency and voltage are indicated by separate output relays
  • Permits connection or re-connection after adjustable time delay tw
  • Protection against manipulation by sealable transparent cover over setting switches
  • Precise adjustment and indication of setting values according to the directive
  • High measuring accuracy
  • Width 70 mm