I.L. 40-385.5
12-2
The phase directional unit FDOP is based on the
angular relationship of a single-phase current and
the corresponding phase-to-phase voltage phasors.
The forward direction is identified if the current pha-
sor leads the voltage phasor. The pair of current and
voltage phasors which are compared are I
A
and V
BA
(FDOPA), I
B
and V
CB
(FDOPB), I
C
and V
AC
(FDOPC).
12.7 PROGRAMMABLE RECLOSING INITIATION
WITH LOGIC FOR RB ON BF SQUELCH.
12.8 COMMUNICATION — REFER TO CHAP-
TER XI FOR DETAIL.
12.9 UNIQUE OSB AND SPT LOGIC TO MEET
THE POWER SYSTEM OPERATION PRAC-
TICES IN CHINA.