Table 38. Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF , LT6CPDIF with 64 Kbit/s communication , continued
Function
Range or value
Accuracy
**Operate time, unrestrained negative
sequence function
Min. = 15 ms
Max. = 35 ms
-
**Reset time, unrestrained negative
sequence function
Min. = 15 ms
Max. = 40 ms
-
The data in the table are valid for a single IED with 64 Kbits/s communication in the loop-back mode.
*Note: Data obtained with single three-phase input current group. The operate and reset times for L3CPDIF are valid for the static output from
SOM.
**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.
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
85
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Содержание Relion 670 Series
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