GE D30 series Instruction Manual page 241

Line distance protection system. ur series

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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 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.

Figure 5–50: LINE PICKUP SCHEME LOGIC

D30 Line Distance Protection System