3UG4641 cos phi and active current monitoring relay
11
11.1 Application areas
Application areas
The cos phi and active current monitoring relays are used, for example, in the following
application areas:
Table 11-1 Application areas of the cos phi and active current monitoring relays
Function Application
• No-load monitoring and load shedding
• Underload monitoring in the low-end perform‐
ance range
• Monitoring for overload
• Simple cos phi monitoring in power systems for
controlling compensation systems
• Cable break between the control cabinet and
the motor
• Fans (in the case of a broken fan belt, for exam‐
ple)
• Pumps (in the case of an idling pump, for ex‐
ample)
• Filter system (a contaminated lter system, for
example)
• Reactive power compensation
• Sawing system
• Conveyor belt
• Surface grinding machine
• Breaking mill
• Milling machine
• Car wash
• Lifting platform
• Screw conveyor
• Crane
• Turning machine
• Infrared heating system
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 217
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