4.36
SEL-351-5, -6, -7 Relay
Instruction Manual
Date Code 20070117
Loss-of-Potential, Load Encroachment, and Directional Element Logic
Directional Control for Negative-Sequence and Phase Overcurrent Elements
q
w
e
.
Figure 4.23
Direction Forward/Reverse Logic for Negative-Sequence
Overcurrent Elements
Directional
Control
Level
Direction
Settings
32QF
q
DIR1 = F
DIR1 = N
Relay
Word
Bit
Relay
Word
Bit
to Negative-
Sequence
Time-0vercurrent
Element
w
to Negative-
Sequence
Instantaneous/
Definite-TIme
Overcurrent
Elements
e
VNOM = OFF
Setting
Forward
Forward
32QR
q
Reverse
Level 1
DIR1 = R
Reverse
DIR2 = F
DIR2 = N
Forward
Level 2
DIR2 = R
Reverse
DIR3 = F
DIR3 = N
Forward
Level 3
DIR3 = R
Reverse
DIR4 = F
DIR4 = N
Forward
Level 4
DIR4 = R
Reverse
Summary of Contents for SEL-351-5
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