Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
RP 9811

Voltage and frequency monitor

RP 9811


Auxiliary voltage

Supply voltage


  • 0065562
  • RP9811.03 3/N AC400/230V
The voltage and frequency monitor RP 9811 represents a solution to monitor mains supply when... more

Product description

The voltage and frequency monitor RP 9811 represents a solution to monitor mains supply when feeding power to a public grid that conforms with various national standards. User-friendly: The unit can be adjusted quickly and simply with only two rotary switches. Use the first rotary switch to select one of the already preset standards according to your national requirements. Use the second rotary switch to set the type of system, quickly and simply, on the unit. You can adjust each parameter individually with menu-guidance in case of different requirements. All measuring variables required are constantly determined by the unit. If incorrect voltage or frequency values occur, the RP 9811 disconnects the distributed power generation system securely from the mains.

Technical specifications

Width: 70 mm
1- / 3-phase: 3
Supply voltage: 3/N AC 400/230 V
Auxiliary voltage: AC/DC
Operate delay: Yes
Output contacts: 3 NO contacts
Enclosure design: Distribution board
Type: RP 9811


  • Mains and system protection for your generator set
  • Can be used in several countries
    - DIN VDE 0126-1-1:2013-08 (generator sets on public grid)
    - VDE-AR-N 4105:2011-08 (generator sets on public grid)
    - BDEW-directive:2008-06 (generator sets on medium voltage grid)
    - CEI 0-21:2012-06 (generator sets in Italy)
    - ÖVE/ÖNORM E8001-4-712:2009 (generator sets in Austria)
    - G59/3 (generator sets in UK)
  • Easy adjustment via rotational switch and menu display
  • Indication, diagnostics and fault presentation via display and LEDs
  • Password protected
  • Protection against manipulation by sealable transparent cover over setting switches
  • CRC-value for parameter testing
  • Adjustment of the voltage for nominal voltage will change the limit values accordingly
  • Mains synchronization on generator operation


  • According to DIN EN 60255-1
  • Can be used according to EEG 2012 and SysStabV
  • Voltage and frequency monitoring for generator sets
  • Fail-safe 2-channel structure
  • Monitoring of the section switches by measuring the response time
  • System test via test button
  • Enabling inputs allow integration into various ripple control and plant concepts
  • Isolated grid detection
  • Manual reset
  • Memorising of disconnection time
  • Connection or re-connection after adjustable delay time tOn
  • Factory setting according to:
    VDE-AR-N 4105:2011-08, DIN VDE 0126-1-1:2013-08,
    BDEW-directive:2008-06, CEI 0-21:2012-06,
    ÖVE/ÖNORM E8001-4-712:2009, G59/3 LV
  • Random controlled disconnection in the range of 50.2 Hz and 51.5 Hz for non-regulated power generation systems
  • Random operated connection time (ton) setting range 60...600 s
  • Additional fault signalling relay output
  • High measuring accuracy
  • Installion type enclosure 4TE (width x height x depth: 70 x 90 x 71 mm)