Siemens 3UG4 - 3 UG4621;3 UG4622 Current Monitoring Relays; Application Areas

3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
173
3UG4621/3UG4622 current monitoring relays
7
7.1
Application areas
Application areas
The current monitoring relays are used, for example, in the following applications:
Table 7- 1 Application areas of the current monitoring relays
Function
Application
• Undercurrent monitoring and overcurrent
monitoring
• Monitoring the functionality of electrical loads
• Wire-break monitoring
• 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,
signal systems, UV lamps, infrared radiators,
laser lamps)