3Ug4641 Cos Phi And Active Current Monitoring Relay; Application Areas - Siemens SIRIUS 3UG4 Equipment Manual

3UG4641 cos phi and active current monitoring relay

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
Function
•
•
•
•
•
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Application areas of the cos phi and active current monitoring relays
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
Application
• 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 filter 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
11
217