Line differential protection RED670
Version 2.2
Table 39. Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF , LT6CPDIF with 2 Mbits/s communication , continued
Function
**Operate time, unrestrained negative
sequence function
**Reset time, unrestrained negative
sequence function
The data in the table are valid for a single IED with 2 Mbits/s communication in loop-back mode.
*Note: Data obtained with single three-phase input current group.
**Note: Data obtained with two three-phase input current groups. The rated symmetrical currents are applied on both sides as pre- and post-fault
currents. The fault is performed by increasing one phase current to double on one side and decreasing same phase current to zero on the other
side.
Hitachi Energy
Range or value
Min. = 10 ms
Max. = 25 ms
Min. = 10 ms
Max. = 30 ms
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Accuracy
-
-
1MRK 505 379-BEN R
87