GE P741

P74x/EN OP/
Na7
Operation
(OP) 5
-
36
MiCOM P741, P742
, P743
OP
CT saturation is detected after a variation of current, detection of a presumption of maximum
flux and current reversal, as shown figure 23. When CT saturation appears, a blocking order
is sent to the CU to block all zones (the check zone is blocked).
FIGURE 23: CT SATURATION RESET
FIGURE 24: CT SATURATION