Protection Functions
PRS-7367 201
This protection can be easily configured with any type of transformer likes two winding, three
winding, scot T connection transformer and auto transformer.
In addition, the 64REF can be configured on the high-voltage side, middle-voltage side or
low-voltage side of the transformer.
3.42.1.1 Function Block
64REF
64REF_Blk
64REF_Str
64REF_Op
Id0
64REF_CT_Satu
64REF_CT_Fail
64REF_I0Neu
3.42.1.2 Signals
Table 3.42-1 64REF Input Signals
The differential and restrained current
This signal blocks all the binary output signals of the
function
Table 3.42-2 64REF Output Signals
Operation signal from 64REF
CT Saturation signal of 64REF
3.42.2 Protection Principle
3.42.2.1 Fault Detector
REF's pickup criterion is:
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