Siemens SIPROTEC 4 7UT6 Series - Setting Notes

[logik-dynam-ansprechwertumschalt-bsp-umz-phasenstrom-121102-st, 1, en_GB]
Figure 2-85
Logic diagram for dynamic cold load pickup feature — illustrated for phase overcurrent protec-
tion stage on side 1 (simplified)
Setting Notes
General
Dynamic cold load pickup can only be enabled if during configuration of the functional scope was set at the
address 117 COLDLOAD PICKUP. = Enabled (see Section 2.1.3 Functional Scope). If the function is not
required Disabled is to be set. In address 1701 COLDLOAD PICKUP the function can be set to ON or OFF.
Cold Load Criteria
You can determine the criteria for dynamic switchover to the cold load pickup values for all protective func-
tions which allow this switchover. Select the current criterion or the breaker position criterion breaker posi-
tion:
•
Address 1702 Start CLP Phase for the phase current stages,
•
Address 1703 Start CLP 3I0 for the residual current stages,
•
Address 1704 Start CLP Earth for the earth current.
2.6.2
Functions
2.6 Dynamic Cold Load Pickup for Time Overcurrent Protection
174 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016