ABB RELION 670 Series Technical Manual page 617

1MRK 502 066-UUS B
VA
VB
VC
ANSI05000012 V3 EN-US
Figure 330: Schematic design of Two step undervoltage protection UV2PTUV (27)
9.1.8 Technical data
Table 339: UV2PTUV (27) technical data
Function
Trip voltage, low and high step
Absolute hysteresis
Internal blocking level, step 1 and step
2
Table continues on next page
Technical manual
Comparator
VA < V1< Voltage Phase
Selector
OpMode1
Comparator
1 out of 3
VB < V1<
2 out of 3
3 out of 3
Comparator
IntBlkStVal1
VC < V1<
PICKUP
Time integrator
tIReset1
MinVoltSelector
ResetTypeCrv1
Comparator
Voltage Phase
VA < V2<
Selector
OpMode2
Comparator
1 out of 3
VB < V2<
2 out of 3
3 out of 3
Comparator
IntBlkStVal2
VC < V2<
PICKUP
Time integrator
tIReset2
MinVoltSelector
ResetTypeCrv2
Phase 1
Phase 2
Pickup
t1
Phase 3
t1Reset
&
Trip
Output
Logic
Step 1
TRIP
Phase 1
Phase 2
Pickup
t2
Phase 3
t2Reset
&
Trip
Output
Logic
Step 2
TRIP
Range or value
(1.0–100.0)% of VBase
VBase
(0.0–50.0)% of
(1.0–50.0)% of VBase
Voltage protection
PU_ST1_A
PU_ST1_B
PU_ST1_C
PU_ST1
OR
TRST1_A
TRST1_B
TRST1_C
TRST1
OR
PU_ST2_A
PU_ST2_B
PU_ST2_C
PU_ST2
OR
TRST2_A
TRST2_B
TRST2_C
TRST2
OR
PICKUP
OR
TRIP
OR
ANSI05000012-3-en.vsd
Accuracy
±0.5% of V
n
±0.5% of V
n
±0.5% of V
n
Section 9
IP13001-1 v1
M13290-1 v14
611