4.104
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
Table 4.29 and Table 4.30 show the availability of the ground directional
elements for the voltage transformer settings DELTAY_X and DELTAY_Y.
Note that on the X side, even when the generator terminal PTs are connected
in DELTA (DELTAY_X := DELTA), the relay allows you to set ORDER to
contain V or U. This is only possible if an external zero-sequence voltage
(3V0) is available and is connected to
VS
or
VN
inputs for polarization
(EXT3V0_X := VS or VN). Refer to Figure 2.16 and Figure 2.25.
Table 4.28
Best Choice Ground Directional Element Logic
ORDER
Setting
Combinations
Resultant Ground Directional Element Preference
(indicated below with corresponding internal enables; run
element that corresponds to highest choice internal enable
that is asserted; system grounding in parentheses)
ORDER
Setting
Combination
Availability
1
st
Choice
2
nd
Choice
3
rd
Choice
OFF
No ground directional elements enabled
All models,
except
SEL-700GW
Q
DIRQGE
QV
DIRQGE
DIRVE
V
DIRVE
VQ
DIRVE
DIRQGE
I
DIRIE
IQ
DIRIE
DIRQGE
IQV
DIRIE
DIRQGE
DIRVE
IV
DIRIE
DIRVE
IVQ
DIRIE
DIRVE
DIRQGE
QI
DIRQGE
DIRIE
QIV
DIRQGE
DIRIE
DIRVE
QVI
DIRQGE
DIRVE
DIRIE
VI
DIRVE
DIRIE
VIQ
DIRVE
DIRIE
DIRQGE
VQI
DIRVE
DIRQGE
DIRIE
U
a
a
U cannot be listed together with other choices in the ORDER setting. ORDER = U can only be
set on the X side.
DIRNE
SEL-700G0
SEL-700G0+
SEL-700G1
SEL-700G1+
SEL-700GT+
Table 4.29
Ground Directional Element Availability by Voltage Transformer
Connections On X Side
Element Designation in
ORDER Setting for X Side
DELTAY_X := WYE
DELTAY_X := DELTA and
EXT3V0_X :=
NONE
EXT3V0_X :=
VS or VN
Q
Yes
Yes
Yes
V
Yes
No
Yes
I
Yes
Yes
Yes
U
Yes
No
Yes
Summary of Contents for SEL-700G Series
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