ABB COM600 series User's & Technical Manual page 25

1MRS758734 COM600 series 5.1
Substation Analytics Technical Manual
triggering. This guarantees that the load compensation uses valid data from the load
conditions.
Internal
In case of internal triggering, the TRIGG input is not used for triggering. Instead, the
trigger signal is created by PSL. The challenge is to time the triggering moment so that
there is sufficient measuring time without the feeder breaker being operated. This is done
by timing the actual triggering moment based on the Pre fault time setting.
To prove that the internal triggering has time to operate before the feeder breaker is
opened, the Pre fault time setting must be set to a valuer smaller than or equal to the
minimum operating time of the function used for tripping the breaker. For example, if
the short circuit protection operating time delay is 0.2 s and the earthfault protection
operating time delay is 0.3 s, Pre fault time should be 0.2 s. The actual triggering occurs
(200 ms - 40 ms) = 160 ms after PSL has recognized the fault condition. 40 ms is reserved
for the PSL function for identifying the fault type.
PSL is a non-directional function and therefore, internal trig-
gering should not be used when directionality is required. The
TRIGG output can be monitored to see if the distance estimate
is updated.
Continuous
Continuous trigger mode can be utilized during the secondary testing of the function
block. In this mode, the function outputs are continuously updated at the task time
interval and can thus be monitored for testing purposes. Recorded data are updated when
the internal or external triggering occurs.
Configuration example
A typical configuration example for FaultLocator_sc_A triggering is illustrated in Fig-
ure 4.3-22. The triggering logic in this example is applicable when the autoreclosing is
initiated by the COMTRADE data update in the IED.
Figure 4.3-22 A typical configuration for triggering of SCEFRFLO
typical_configuration_for_triggering_SCEFRFLO.png
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