Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
RK 9871

Undervoltage Relay

RK 9871

Contacts

Nominal voltage

Variant

  • 0062759
  • RK9871.72 3/N AC400/230V 50/60HZ

Technical specifications

Width: 17,5 mm
Operate delay: +
Enclosure design: Distribution board
1- / 3-phase: 1, 3
Output contacts: 1 Wechsler, 2 Wechsler
Measuring range max.: AC 400 V
Type: RK 9871

Advantages

  • Higher safety in buildings

Features

  • According to IEC/EN 60255-1
  • For installations according to DIN VDE 0100-718 and DIN VDE 0108-100
    (replacement of DIN VDE 0108 )
  • Detection of undervoltage in 3-phase systems
  • Without separately auxiliary voltage (internal supply from all 3 phases)
  • LED indication for für operation voltage and contact position
  • De-energised on trip
  • RK 9871.71: 1 changeover contact
    RK 9871.72: 2 changeover contacts
  • With fixed time delay of 0.5s for fault indication
  • With fixed time delay of 1min for reset
  • With fixed response value at AC 195.5V
  • As option with test-button for function control
  • Width 17,5 mm