Circuit Breaker Operation Monitoring - ABB RES670 Technical Manual

Section 16
Monitoring
16.4.7.6
16.4.7.7
544
Alarm limit check
OPERALM is generated when the number of operations exceeds the set value of the
OperAlmLevel threshold setting.
If the number of operations increases and exceeds the limit value set with the
OperLOLevel setting, the OPERLO output is activated.
The binary outputs OPERALM and OPERALO are deactivated when the BLKALM input
is activated.

Circuit breaker operation monitoring

The circuit breaker operation monitoring subfunction indicates the inactive days of the
circuit breaker and gives an alarm when the number of days exceed the set level. The
operation of the circuit breaker operation monitoring is shown in figure 215.
POSCLOSE
POSOPEN
BLOCK
BLKALM
IEC12000614 V2 EN-US
Figure 215: Functional module diagram for circuit breaker operation monitoring
Inactive timer
The Inactive timer module calculates the number of days the circuit breaker has
remained in the same open or closed state. The value is calculated by monitoring the
states of the POSOPEN and POSCLOSE auxiliary contacts.
The number of inactive days INADAYS is available as a service value. The initial
number of inactive days is set using the InitInactDays parameter.
Alarm limit check
MONALM is initiated when the number of inactive days and hours exceed the limit value
defined by the InactiveAlDays and InactivAlHrs setting. The alarm signal MONALM can
be blocked by activating the binary input BLKALM.
Circuit breaker spring charge monitoring
The circuit breaker spring charge monitoring subfunction calculates the spring
charging time. The operation is described in figure 216.
Inactive timer
Alarm limit
1MRK 511 408-UUS A
GUID-6DAE4C6B-BD66-49CD-817D-08E4EBF47DE0 v9
Check
GUID-F850A940-7890-4C37-8B31-6C7D5B30E582 v11
Phasor measurement unit RES670 2.2 ANSI
Technical manual
INADAYS
MONALM