GE B30 Instruction Manual page 399

8 THEORY OF OPERATION
GE Multilin
NORMAL
SAT := 0
The differential
current below the
saturation
first slope for a
condition
certain period of
time
EXTERNAL
FAULT
SAT := 1
The differential
characteristic
entered
EXTERNAL
FAULT and CT
SATURATION
SAT := 1
Figure 8–8: SATURATION DETECTOR STATE MACHINE
B30 Bus Differential System
8.5 SATURATION DETECTOR
The differential-
restraining trajectory
out of the differential
characteristic for a
certain period of time
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