Breaker Contact Travel Time - ABB 615 series Technical Manual

Section 7
Condition monitoring functions
7.1.4.3
882
A071105 V2 EN
Figure 455: Functional module diagram for calculating inactive days and alarm for
circuit breaker operation monitoring
Inactivity timer
The module calculates the number of days the circuit breaker has remained inactive, that
is, has stayed in the same open or closed state. The calculation is done by monitoring the
states of the POSOPEN and POSCLOSE auxiliary contacts.
The inactive days INA_DAYS is available in the monitored data view. It is also possible
to set the initial inactive days with the Ini inactive days parameter.
Alarm limit check
When the inactive days exceed the limit value defined with the Inactive Alm days setting,
the MON_ALM alarm is initiated. The time in hours at which this alarm is activated can be
set with the Inactive Alm hours parameter as coordinates of UTC. The alarm signal
MON_ALM can be blocked by activating the binary input BLOCK.

Breaker contact travel time

The Breaker contact travel time module calculates the breaker contact travel time for the
closing and opening operation. The operation of the breaker contact travel time
measurement can be described with a module diagram. All the modules in the diagram are
explained in the next sections.
A071106 V4 EN
Figure 456: Functional module diagram for breaker contact travel time
Traveling time calculator
The travel time can be calculated using two different methods based on the setting Travel
time Clc mode.
1MAC059074-MB A
615 series ANSI
Technical Manual