3Ug4621/3Ug4622 Current Monitoring Relays; Application Areas - Siemens SIRIUS 3UG4 Equipment Manual

3UG4621/3UG4622 current monitoring relays

7.1

Application areas

Application areas
The current monitoring relays are used, for example, in the following applications:
Table 7-1
Function
•
•
•
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Application areas of the current monitoring relays
Undercurrent monitoring and overcurrent mon‐
itoring
Monitoring the functionality of electrical loads
Wire-break monitoring
Application
• Threshold switch for analog signals from 4 to 20
mA
• Emergency lighting (failure of a lamp → drop in
current strength in the system)
• Heating systems (electroplating plants, plastic
injection machines, paintshops)
• Lamps (tunnels, OP lighting, traffic lights, sig‐
nal systems, UV lamps, infrared radiators, laser
lamps)
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