GE L90 Instruction Manual page 281

5 SETTINGS 5.6 GROUPED ELEMENTS
by an undervoltage condition, which in turn is controlled by the operand with a 10 ms coordination timer. If
VT FUSE FAIL OP
a trip from distance in not required, then it can be disabled with the setting. Configure the
LINE
LINE PICKUP DISTANCE TRIP
operand to perform a trip action if the intent is apply zone 1 extension.
PICKUP RCL TRIP
The zone 1 extension philosophy used here normally operates from an under-reaching zone, and uses an overreaching
distance zone when reclosing the line with the other line end open. The setting is provided to achieve
AR ACCELERATE
zone 1 extension functionality if external autoreclosure is employed. Another zone 1 extension approach is to permanently
apply an overreaching zone, and reduce the reach when reclosing. This philosophy can be programmed via the autore-
close scheme.
5
Figure 5–62: LINE PICKUP SCHEME LOGIC
GE Multilin L90 Line Current Differential System 5-151