Functions
2.4 Dynamic Cold Load Pickup
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
104
If the binary input „>BLOCK CLP“ is enabled, all triggered timers are reset and, as a consequence, all "normal"
settings are immediately restored. If blocking occurs during an on-going fault with dynamic cold load pickup
functions enabled, the timers of all overcurrent relay elements are stopped and may then be restarted based
on their "normal" duration.
During power up of the protective relay with an open circuit breaker, the time delay CB Open Time is started,
and is processed using the "normal" settings. Therefore, when the circuit breaker is closed, the "normal" set-
tings are effective.
Figure 2-27 Timing charts of the dynamic cold load pickup function
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