ABB Relion 670 series - Page 617

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_B
TRST2_C
PU_ST2
TRST2
TRIP
Comparator
VA < V1<
Comparator
VB < V1<
Comparator
VC < V1<
MinVoltSelector
Comparator
VA < V2<
Comparator
VB < V2<
Comparator
VC < V2<
MinVoltSelector
Pickup
&
Trip
Output
Logic
Step 1
Pickup
&
Trip
Output
Logic
Step 2
Phase 3
Phase 2
Phase 1
Phase 3
Phase 2
Phase 1
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
IntBlkStVal1
t1
t1Reset
IntBlkStVal2
t2Reset
t2
ANSI05000012-3-en.vsd
ANSI05000012 V3 EN-US
Figure 330: Schematic design of Two step undervoltage protection UV2PTUV (27)
9.1.8 Technical data
IP13001-1 v1
M13290-1 v14
Table 339: UV2PTUV (27) technical data
Function
Range or value Accuracy
Trip voltage, low and high step (1.0–100.0)% of VBase ±0.5% of V
n
Absolute hysteresis (0.0–50.0)% of VBase ±0.5% of V
n
Internal blocking level, step 1 and step
2
(1.0–50.0)% of VBase ±0.5% of V
n
Table continues on next page
1MRK 502 066-UUS B Section 9
Voltage protection
611
Technical manual