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 dened voltage is reached
• Threshold switch for analog signals from 0.1 to 10 V
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 203
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