Operation Principle - ABB RET650 Technical Manual

1MRK 504 135-UEN A
14.17.7
Technical manual
Name Type
NOOPRDAY INTEGER
CBLIFEL1 INTEGER
CBLIFEL2 INTEGER
CBLIFEL3 INTEGER
IACCL1 REAL
IACCL2 REAL
IACCL3 REAL

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 "On" and "Off". The
operation counters are cleared when Operation is set to "Off".
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.
Values (Range) Unit
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Section 14
Monitoring
Description
The number of days CB
has been inactive
CB Remaining life phase
L1
CB Remaining life phase
L2
CB Remaining life phase
L3
Accumulated currents
power (Iyt), phase L1
Accumulated currents
power (Iyt), phase L2
Accumulated currents
power (Iyt), phase L3
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