Over 800,000 products available

Siemens Monitoring Relay, SPDT, DIN Rail, 24V ac 24 V dc

View all Monitoring Relays

Subtotal (1 unit)*

£339.25

(exc. VAT)

£407.10

(inc. VAT)

Add to Basket
Select or type quantity
Stocked by manufacturer
  • Ready to ship from 16 June 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
1 +£339.25

*price indicative

RS Stock No.:
255-0872
Mfr. Part No.:
3UG45822AW31
Brand:
Siemens
Find similar products by selecting one or more attributes.
Select all

Brand

Siemens

Product Type

Monitoring Relay

Contact Configuration

SPDT

Mount Type

DIN Rail

IP Rating

IP20

Minimum Operating Temperature

-25°C

Supply DC Voltage

24 V dc

Contact Current

4A

Supply AC Voltage

24V ac

Maximum Operating Temperature

60°C

Series

3UG4

Standards/Approvals

RoHS

COO (Country of Origin):
DE
The Siemens Insulation monitoring relays are used for monitoring the insulation resistance between ungrounded 1- or 3-phase AC supplies and a protective conductor. They measure insulation resistances between system cables and system ground. If the value falls below the threshold value, the output relays are switched to fault status. With these devices, which are suitable for both AC and DC networks, a pulsed test signal is fed into the network to be monitored and the isolation resistance is determined. The pulsed test signal changes its form according to insulation resistance and network loss capacitance. The changed form is used to predict the changed insulation resistance.

Monitoring of setting errors

Integrated system test after start-up

Resetting and testing option

New predictive measurement principle allows very fast response times

Related links