Toshiba GR-200 Series Instruction Manual page 545

Voltage components handled in IED
(ii)
Similarity, handling voltages are summarized in Table 5.4-13, 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
V − V V
0
L2 L3
V − V V
0
L3 L1
V
0
L1
V
0
L2
V
0
L3
2 V +V
V +a∙V +a ∙V
L1
L1 L2 L3
0
3
2 V +V
+a ∙V
V +a∙V
L1
L1 L2 L3
0
3
+V
V +V
L1 L2 L3
0
3
- 526 -
, V , V can be introduced using the below
ab bc ca
2PP
V
L1 L1
V
L2 L2
−(V + V )
L3 L1 L2
0 0
0 0
0 0
V +V
∠60° ∠60°
L2 L1 L2
3 3
V +V
∠ − 60° ∠ − 60°
L2 L1 L2
3 3
0 0
6F2T0200 (0.15)
Setting
[Conn-VeVT] [Conn-VsVT]
No 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 (1,2)
Setting
Use
0 Vs