Active Power Monitoring - Siemens SIRIUS 3RW55 Equipment Manual

8.8.3

Active power monitoring

Operating principle
The active power is influenced by the loading status of the motor. Depending on the limit that
is exceeded, a warning or an error is signaled. The active power monitoring is deactivated during
starting and stopping. The current active power heating can be displayed via the measured value
"Active power" (Page 227)
Application
• Load monitoring for over-dimensioned motors
• Detection of pumps running empty and avoidance of damage to pump gears
• Avoidance of load peaks
• Derivation of production quality data from energy data
Setting via 3RW5 HMI High Feature
• Menu: "Parameters > Soft Starter > Parameter set 1 / 2 / 3 > Condition Monitoring > Active
power monitoring"
• Access protection to the 3RW5 HMI High Feature is not active or has been reset.
Parameters
Parameters
Reference value
Upper limit - error
Upper limit - maintenance de‐
manded
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
Description
Set the rated motor power for the reference value. The rated motor power can be obtained
from the motor data. The following limits for active power monitoring refer to this reference
value (rated motor power). The setting "0 W" deactivates the active power monitoring.
• Factory setting: 0 W
• Setting range: 0 W ... 2 000 kW
• In steps of: 1 W
Upper limit
If the active power exceeds this limit, an error is generated and the 3RW55 and 3RW55 Failsafe
soft starters behave as set in the parameter "Response to error". The setting "0%" deactivates
the monitoring of the limit value.
• Factory setting: 0%
• Setting range: 0 ... 400%
• In steps of: 1%
If the active power exceeds this limit, a warning is generated. The setting "0%" deactivates the
monitoring of the limit value.
• Factory setting: 0%
• Setting range: 0 ... 400%
• In steps of: 1%
Functions
8.8 Condition Monitoring
177