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Voltage components handled in IED
(ii)
Similarity, handling voltages are summarized in Table 4.3.4-2, which can be grouped with VT
connection styles (see Chap. 5.4.6). For example, if the IED has setting [Conn-VT]=3PN,
applied voltages at V
Additionally, phase-to-phase voltages, V
equations:
V
= V
− V
ab
L1
V
= V
− V
L2
bc
V
= V
− V
L3
ca
Table 5.4-13 Voltage defined with VCT applied signals and settings
Voltages handled in
IED
No
use
Vab
Phase-to-phase
Vbc
voltages
Vca
Va
Phase-to-ground
Vb
voltages
Vc
Zero-sequence
Ve
voltage
For autoreclosing
Vs
voltage checking
V1
Symmetrical
V2
voltages
V0
, V
, V
terminals, they are converted for Va, Vb, and Vc, respectively.
L1
L2
L3
L2
L3
L1
Setting[Conn-VT]
3PN
3PP
V
− V
V
0
L1
L2
L1
V
− V
V
0
L2
L3
L2
V
− V
V
0
L3
L1
L3
V
0
L1
V
0
L2
V
0
L3
2
V
+V
V
+a∙V
+a
∙V
L1
L2
L3
L1
0
3
3
2
V
+V
+a
∙V
V
+a∙V
L1
L1
L2
L3
0
3
+V
V
+V
L1
L2
L3
0
3
- 643 -
, V
, V
can be introduced using the below
ab
bc
ca
2PP
V
L1
V
L2
−(V
+ V
)
L1
L2
0
0
0
0
0
0
V
+V
∠60°
∠60°
L2
L1
L2
3
V
+V
∠ − 60°
∠ − 60°
L2
L1
L2
3
3
0
0
6F2T0207 (0.01)
Setting
[Conn-VeVT]
[Conn-VsVT]
No
1PN 1PP
Use
use
use
V
0
L1
0
0
0
0
V
0
L1
0
0
0
0
0
Ve
0
0
0
0
0
0
GRE200 (5,6)
Setting
No
Use
0
Vs
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