GE L60, Instruction Manual, Page: 179 / 498

GE Multilin L60 Line Phase Comparison Relay 5-87
5 SETTINGS 5.5 GROUPED ELEMENTS
5
by an undervoltage condition, which in turn is controlled by the
VT FUSE FAIL OP
operand with a 10 ms coordination timer. If
a trip from distance in not required, then it can be disabled with the
LINE PICKUP DISTANCE TRIP
setting. Configure the
LINE
PICKUP RCL TRIP
operand to perform a trip action if the intent is apply Zone 1 extension.
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
AR ACCELERATE
setting is provided to achieve
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.
Figure 5–39: LINE PICKUP SCHEME LOGIC