Toshiba GR200 Series Instruction Manual page 932

VTs on feeder
Feeder#1
A B
Figure 5.2-9 Computation of residual voltage
Setting [APPL-Ves2] = Off
(iii)
If no voltage is applied at the Vs2/Ve terminal, the user can set Off for the setting [APPL-
VTes2].
VTs on busbar
CB#1
VTs on feeder
A B C
Feeder
Setting [APPL-Ves2]=Off
Figure 5.2-10 Connection with one VT on the busbar
Settings CT polarity setting in 1CB or 1.5CB
(iv)
The user can reverse the CT polarity using settings. For example in 1CB arrangement, when
the user wishes to change the polarity to negative in the first currents group (that is, Ia, Ib,
and Ic on the VCT; we term them '1CT'), set Negative for the setting [Pol-1CT].
CB#1 VTs on busbar
CB#2
CB
Feeder#2
C
- 911 -
Busbar
IED
VCT
VT
Va
Vb
Vc
V s
V s2 /V e
Busbar
Busbar
IED
Relay application
VCT
Three-phase voltages
VT
Va
V L1
Vb
V L2
Vc
V L3
Computation
Zero sequence
phase voltage (3V0)
Reference voltage
V s
V3
V s2 /V e
6F2S1915 (0.46)
Relay application
Three-phase voltages
V L1
V L2
V L3
Computation
Zero sequence
phase voltage (3V0)
Reference voltage
V3
Reference voltage
V4
GRZ200 (Soft 031 & 032)