PICKUP
PU_ST1_A
PU_ST1_B
PU_ST1_C
TRST1-A
TRST1_B
TRST1_C
PU_ST1
TRST1
PICKUP
PU_ST2_A
PU_ST2_B
PU_ST2_C
TRST2-A
TRST2-C
PU_ST2
TRST2
TRIP
_
.
Comparator
VA >
Pickup 1
Comparator
VB >
Comparator
VC >
MaxVoltSelect
Comparator
VA >
Comparator
VB >
Comparator
VC >
MaxVoltSelect
Pickup
&
Trip
Output
Logic
Step1
Pickup
&
Trip
Output
Logic
Step 2
Phase C
Phase B
Phase A
Phase C
Phase A
Time integrator
tIReset2
ResetTypeCrv2
Voltage Phase
Selector
OpMode2
1 out of 3
2 out of 3
3 out of 3
Time integrator
tIReset1
ResetTypeCrv1
Voltage Phase
Selector
OpMode1
1 out of 3
2 out of 3
3 out of 3
VA
VB
VC
TRIP
TRIP
OR
OR
OR
OR
OR
OR
PICKUP
TRST2-B
Pickup 1
Pickup 1
Pickup 2
Pickup 2
Pickup 2
Phase B
Phase C
t1
t1Reset
t2
t2Reset
ANSI05000013-2-en.vsd
ANSI05000013 V2 EN
Figure 263:
Schematic design of Two step overvoltage protection OV2PTOV (59)
1MRK505222-UUS C
Section 8
Voltage protection
513
Technical reference manual
Summary of Contents for Relion 670 series
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