Siemens 3UG4 - 3 UG463. Voltage Monitoring Relay; Application Areas

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