Vts Acceleration Indication Logic; Figure 166: Vts Logic; Figure 167: Vts Acceleration Indication Logic - GE MiCOM P40 Agile Technical Manual

Chapter 15 - Supervision
All Poles Dead
IA
VTS I> Inhibit
IB
VTS I> Inhibit
IC
VTS I> Inhibit
VA
VTS PickupThresh
VB
VTS PickupThresh
VC
VTS PickupThresh
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
V01202

Figure 166: VTS logic

As can be seen from the diagram, the VTS function is inhibited if:
An All Poles Dead DDB signal is present
●
● Any phase overcurrent condition exists
A Negative Phase Sequence current exists
●
● If the phase current changes over the period of 1 cycle
3.6

VTS ACCELERATION INDICATION LOGIC

Trip Command In
V02001

Figure 167: VTS Acceleration Indication Logic

318
1
&
1
1 & S
Q
R
&
&
&
1
&
S
&
Q
R
1 S
&
R
1
&
VTS Slow Block
1 &
VTS Fast Block
1
VT Fail Alarm
Q
VTS Acc Ind
P14D-TM-EN-8
P14D