ABB RELION 620 Series Technical Manual page 572

Section 6
Supervision functions
566
measured between the opening of the POSOPEN auxiliary contact and the closing of the
POSCLOSE auxiliary contact.
A071107 V1 EN
Figure 281: Travel time calculation
There is a time difference t
of the POSCLOSE auxiliary contact. Similarly, there is a time gap t
when the POSOPEN auxiliary contact opens and the main contact is completely open. To
incorporate the time t + t
1
opening time. This factor is added with the Opening time Cor (= t
closing time is calculated by adding the value set with the Closing time Cor (t
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.
between the start of the main contact opening and the opening
1
, a correction factor needs to be added with t
2
1MAC504801-IB E
between the time
2
to get the actual
open
+ t ) setting. The
1 2
+ t ) setting
3 4
620 series ANSI
Technical Manual