Setting Notes - Siemens SIPROTEC 4 Manual

Functions
2.4 Dynamic Cold Load Pickup
[7sj6x_dyn_parumschaltung-150502-kn, 1, en_US]
Figure 2-35

Setting Notes

2.4.2
General
The dynamic cold load pickup function can only be enabled if address 117 Coldload Pickup was set to
Enabled during configuration of the protection functions. If not required, this function is set to Disabled.
The function can be turned ON or OFF under address 1701 Coldload Pickup.
Depending on the condition that should initiate the cold load pickup function address 1702 Start Condi-
tion is set to either No Current, Breaker Contact or to 79 ready. Naturally, the option Breaker
Contact can only be selected if the device receives information regarding the switching state of the circuit
breaker via at least one binary input. The option 79 ready modifies dynamically the pickup thresholds of the
directional and non-directional time overcurrent protection when the automatic reclosing function is ready. To
108
Logic diagram of the dynamic cold load pickup function (50c, 50Nc, 51c, 51Nc, 67c, 67Nc)
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017