ABB RELION Series, Техническое руководство

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GUID-A8C2EB5B-F105-4BF7-B1EC-77D4B8238531 V1 EN
Figure 284: Travel time calculation when Travel time Clc mode is “From Cmd to
Pos”
There is a time difference t
1
between the start of the main contact opening and the
OPEN_CB_EXE command. Similarly, there is a time gap t
2
between the time when
the
POSOPEN
auxiliary contact opens and the main contact is completely open.
Therefore, to incorporate the times t
1
and t
2
, a correction factor needs to be added with
t
open
to get the actual opening time. This factor is added with the Opening time Cor (=
t
2
- t
1
) setting. The closing time is calculated by adding the value set with the Closing
time Cor (t
4
- t
3
) setting to the measured closing time.
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.
7.1.4.4 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.
Section 7
1MRS758755 A
Condition monitoring functions
540 REC615 and RER615
Technical Manual