Undervoltage Relay
RK 9871

Monitoring of undervoltage in 3 phase voltage systems and switch over to emergency supply.

Advantages
. Higher safety in buildings

Features
. According to IEC/EN 60255-1
. For installations according to DIN VDE 0100-718:2005-10 and DIN VDE 0108-100:2005-01
. 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 0.5 s for fault indication
. With fixed time delay of 1 min for reset
. With fixed response value at AC 195.5 V
. As option with test-button for function control
. Width 17.5 mm

Technical specifications
Width: 17,5mm
Operate delay: Yes
Enclosure design: Distribution board
1- / 3-phase: 3, 1
Output contacts: 1 C/O contact, 2 C/O contacts
Auxiliary voltage: Without
Type: RK 9871
Nominal voltage max.: 3/N AC 400/230V


Manufacturer: E. Dold & Söhne GmbH & Co. KG
Type: RK9871.72 3/N AC400/230V 50/60HZ
Art. No.: 0062759