3Ug463. Voltage Monitoring Relay; Application Areas - Siemens SIRIUS 3UG4 Equipment Manual

3UG463. voltage monitoring relay

10.1

Application areas

Application areas
The voltage monitoring relays are used, for example, in the following applications:
Table 10-1
Function
•
•
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Application areas of the voltage monitoring relays
Application
Undervoltage •
Overvoltage •
•
•
•
•
•
•
•
•
•
•
Increased current on a motor with corresponding overheating
Unintended device reset
Power system collapse on overloaded supply voltages
Fork-lift trucks
Heating systems
Cranes
Elevators
Protection from undervoltage (especially with battery power; result: e.g.
exhaustive discharge)
System protection against destruction caused by supply overvoltages
Energy supply to the line
Machine switch-on when a defined voltage is reached
Threshold switch for analog signals from 0.1 to 10 V
10
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