Siemens SIMOCODE pro System Manual page 676

Glossary
Cooling down period
Cos phi monitoring
Current limit monitoring
Current measuring module (IM)
Current/voltage measuring module
Decoupling module
Glossary-4
The cooling down period is the amount of time that must
elapse before an overload trip can be reset. This is usually
5 minutes.
Supply voltage failures of SIMOCODE pro during this time
extend the specified time correspondingly.
Cos phi monitoring monitors the load condition of inductive
loads. The main field of application is for asynchronous
motors in 1-phase or 3-phase networks with loads that
fluctuate significantly. The measuring principle for the power
factor (cos phi) is based on the evaluation of the phase
displacement between voltage and current in one phase.
Monitoring of current limits is used for process monitoring.
Thus, impending irregularities in the system can be detected
in good time: If a current limit is exceeded but still below the
overload limit, it can, for example, indicate a dirty filter on a
pump, or an increasingly sluggish motor bearing. If the
current limit is undershot, it can be the first sign of a worn-
out drive motor belt.
Current measuring modules are used together with the basic
units of the SIMOCODE pro C and SIMOCODE pro V device
series.
The current measuring module must be selected according to
the set current to be monitored (rated operating current of
the motor). The current measuring modules cover current
ranges between 0.3 A and 630 A, with intermediate
transformers up to 820 A.
The SIMOCODE pro V device series allows a current/voltage
measuring module to be used instead of a current measuring
module.
In addition to measuring the motor current, current/voltage
measuring modules also enable:
• Monitoring voltages up to 690 V
• Calculation and monitoring of power and cos phi
• Monitoring of the phase sequence.
A module for connection in series upstream from a current/
voltage measuring module to the system interface when
voltage and power measurements are implemented in non-
earthed networks.
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03