Undervoltage Relay RK 9871

Numero Ordine: 0062759
Type: RK9871.72 3/N AC400/230V 50/60HZ

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

Descrizione del prodotto

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

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