E. Dold & Söhne GmbH & Co. KG

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

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Tel.: +49 7723 654-454
E-Mail: ab@dold.com

Direct contact for technical questions

Tel.: +49 7723 654-459
E-Mail: rv@dold.com

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Tel.: +49 7723 654-455
RP 9800

Voltage and frequency monitor

RP 9800


Time delay

Supply voltage


  • 0062263
  • RP9800.12 3/N AC400/230V tw=90S
With the voltage and frequency monitor RP 9800, DOLD offers a possibility to disconnect... more

Product description

With the voltage and frequency monitor RP 9800, DOLD offers a possibility to disconnect self-generating systems from the low-voltage grid in case of impermissible voltage and frequency values. The voltage and frequency increase or decrease, the reconnection time and the average value of the voltage increase over 10 minutes can be set individually as required using rotary switches.

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


  • Easy adjustment via rotational switch
  • Precise adjustment and indication of setting values
  • Protection against manipulation by sealable transparent cover over setting switches


  • 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
  • High measuring accuracy
  • Width 70 mm