4.21
Date Code 20060320
Instruction Manual
SEL-311C Relay
Loss-of-Potential, CCVT Transient Detection, Load-Encroachment, and Directional Element Logic
Directional Control Settings
Directional Control Settings
The directional control for overcurrent elements is configured by making
directional control enable setting E32. Setting E32 has setting choices:
➤
Y (All directional control settings made manually)
➤
AUTO (Sets most of the directional element settings
automatically)
Settings Made
Automatically
If the directional control enable setting E32 is set:
E32 =
AUTO
then the following directional control settings are calculated and set
automatically:
Z2F, Z2R, 50QFP, 50QRP, a2, k2, 50GFP, 50GRP, a0, Z0F, and Z0R
Once these settings are calculated automatically, they can only be modified if
the user goes back and changes the directional control enable setting to
E32 = Y.
The remaining directional control settings are
not
set automatically if setting
E32 = AUTO. They have to be set by the user, whether setting E32 = AUTO or
Y. These settings are:
DIR3, DIR4, ORDER, and E32IV
All these settings are explained in detail in the remainder of this subsection.
Settings
Zone 1/Level 1 and Zone 2/Level 2 elements, except 67P1 and 67P2, are fixed
forward and may not be changed by the user.
DIR3-Zone 3/Level 3 Element Direction Setting
DIR4-Zone 4/Level 4 Element Direction Setting
Setting Range:
F = Direction Forward
R = Direction Reverse
shows the elements that are controlled by each level direction
setting.
Table 4.2
Elements Controlled by Zone/Level Direction Settings (Corresponding Overcurrent and Directional
Element Figure Numbers in Parentheses)
(Sheet 1 of 2)
Level
Direction
Settings
Phase Distance
Ground Distance
Residual Ground
Negative-Sequence
Forward
M1P (
M1PT (
)
Z1G (
Z1GT (
67G1 (
67G1T (
67Q1 (
)
67Q1T (
Forward
M2P (
M2PT (
)
Z2G (
Z2GT (
67G2 (
67G2T (
67Q2 (
)
67Q2T (
Summary of Contents for SEL-311C
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