ABB RELION 620 Series Technical Manual page 918

Section 7
Condition monitoring functions
7.1.4
912
Operation principle
The circuit breaker condition monitoring function includes different metering and
monitoring sub-functions. The functions can be enabled and disabled with the
Operation setting. The corresponding parameter values are "On" and "Off". The
operation counters are cleared when Operation is set to "Off".
The operation of SSCBR can be described with a module diagram. All the modules in
the diagram are explained in the next sections.
A071103 V4 EN
Figure 475: Functional module diagram
1MRS757644 F
620 series
Technical Manual