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Undervoltage Relay
RK 9871
- Article number: 0062759
- Variant: RK9871.72 3/N AC400/230V 50/60HZ
Monitoring of undervoltage in 3 phase voltage systems and switch over to emergency supply. more
Product description
Monitoring of undervoltage in 3 phase voltage systems and switch over to emergency supply.
Technical specifications
| Width: | 17,5 mm |
| Operate delay: | Yes |
| 1- / 3-phase: | 1, 3 |
| Nominal voltage max.: | 3/N AC 400/230 V |
| Auxiliary voltage: | Without |
| Output contacts: | 1 C/O contact, 2 C/O contacts |
| Enclosure design: | Distribution board |
| Type: | RK 9871 |
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