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.
16.4.7.6
Circuit breaker operation monitoring
GUID-6DAE4C6B-BD66-49CD-817D-08E4EBF47DE0 v9
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
.
POSCLOSE
POSOPEN
BLOCK
BLKALM
Inactive timer
Alarm limit
Check
INADAYS
MONALM
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
.
16.4.7.7
Circuit breaker spring charge monitoring
GUID-F850A940-7890-4C37-8B31-6C7D5B30E582 v11
The circuit breaker spring charge monitoring subfunction calculates the spring
charging time. The operation is described in figure
.
Section 16
1MRK 511 408-UUS A
Monitoring
544
Phasor measurement unit RES670 2.2 ANSI
Technical manual
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