Operation Counter - ABB RELION REX640 Technical Manual

1MRS759142 C
7.1.5.4
REX640
Technical Manual
GUID-990F42C6-EB22-4814-A7D4-9C55D4B4FB5F V1 EN
Figure 687: Travel time calculation when Travel time Clc mode is "From Cmd to
Pos"
There is a time difference t
OPEN_CB_EXE command. Similarly, there is a time gap t
the POSOPEN auxiliary contact opens and the main contact is completely open.
Therefore, to incorporate the times t
t to get the actual opening time. This factor is added with the Opening time Cor (=
open
t - t ) setting. The closing time is calculated by adding the value set with the Closing
2 1
time Cor (t - t ) setting to the measured closing time.
4 3
The last measured opening travel time T_TRV_OP and the closing travel time
T_TRV_CL are available in the monitored data view on the LHMI or through tools via
communications.
Alarm limit check
When the measured opening travel time is longer than the value set with the Open
alarm time setting, the TRV_T_OP_ALM output is activated. Respectively, when the
measured closing travel time is longer than the value set with the Close alarm time
setting, the TRV_T_CL_ALM output is activated.
It is also possible to block the TRV_T_CL_ALM and TRV_T_OP_ALM alarm signals
by activating the BLOCK input.

Operation counter

The operation counter subfunction calculates the number of breaker operation cycles.
The opening and closing operations are both included in one operation cycle. The
operation counter value is updated after each opening operation.
Condition monitoring functions
between the start of the main contact opening and the
1
and t , a correction factor needs to be added with
1 2
Section 7
between the time when
2
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