Name Type Values (Range) Unit Description
NOOPRDAY INTEGER - - The number of days CB has
been inactive
CBLIFE_A INTEGER - - CB Remaining life phase A
CBLIFE_B INTEGER - - CB Remaining life phase B
CBLIFE_C INTEGER - - CB Remaining life phase C
IACC_A REAL - - Accumulated currents power
(Iyt), phase A
IACC_B REAL - - Accumulated currents power
(Iyt), phase B
IACC_C REAL - - Accumulated currents power
(Iyt), phase C
12.17.7 Operation principle
The circuit breaker condition monitoring function includes a number of metering and
monitoring subfunctions. The functions can be enabled and disabled with the
Operation setting. The corresponding parameter values are Enable and Disable. The
operation counters are cleared when Operation is set to Disabled.
The operation of the functions can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
Section 12 1MRK 505 277-UUS C
Monitoring
322
Technical Manual
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