Vts Logic; Figure 131: Vts Logic (P642 With 2 Single-Phase Vts) - GE P642 Technical Manual

Chapter 14 - Supervision
2.5

VTS LOGIC

All Poles Dead
IA
VTS I> Inhibit
IB
VTS I> Inhibit
IC
VTS I> Inhibit
VA
Hardcoded threshold
VB
Hardcoded threshold
VC
Hardcoded threshold
Delta IA
Hardcoded threshold
Delta IB
Hardcoded threshold
Delta IC
Hardcoded threshold
V2
Hardcoded threshold
I2
I2>1 Current Set
VTS Reset Mode
Manual
Auto
MCB/VTS
VTS Status
Indication
Blocking
Any Pole Dead
VTS Acc Ind
V01224

Figure 131: VTS logic (P642 with 2 single-phase VTs)

288
1
&
1
1 & S
Q
R
&
&
&
1
&
Note: This diagram does not show all stages . Other stages follow similar principles.
& S
Q
R
1 S
&
R
1
&
VTS Slow Block
1 &
VTS Fast Block
1
VT Fail Alarm
Q
P64x-TM-EN-1.3
P64x