3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
271
3UG463. voltage monitoring relay
10
10.1
Application areas
Application areas
The voltage monitoring relays are used, for example, in the following applications:
Table 10- 1 Application areas of the voltage monitoring relays
Function
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