ABB Relion 670 Series RES670, Technical Manual

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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
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 204 .
POSCLOSE
POSOPEN
BLOCK
BLKALM
Inactive timer
Alarm limit
Check
INADAYS
MONALM
IEC12000614 V2 EN
Figure 204: 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
.
Section 16
1MRK 511 365-UUS A
Monitoring
536 Phasor measurement unit RES670 2.1 ANSI
Technical manual