ABB Relion 650 Series Technical Manual page 251

1MRK 506 326-UUS B
VL1 or VA
VL2 or VB
VL3 or VC
ANSI08000012 V1 EN-US
Figure 125: Schematic design of Two step overvoltage protection (OV2PTOV, 59)
7.2.8 Technical data
Table 175: OV2PTOV (59) technical data
Function
Operate voltage, low and high step
Reset ratio
Inverse time characteristics for low
and high step, see table
Table continues on next page
Line distance protection REL650
Technical manual
Comparator
V > Pickup1
Voltage Phase
Selector
Comparator OpMode1
V > Pickup1 1 out of 3
2 outof 3
3 out of 3
Comparator
V > Pickup1
Time integrator
MaxVoltSelect
t1
Comparator
V > Pickup2
Voltage Phase
Selector
Comparator OpMode2
V > Pickup2 1 out of 3
2 outof 3
3 out of 3
Comparator
V > Pickup2
Timer
t2
576
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Phase 1
Phase 2
Pickup
Phase 3
&
Trip
Output
Logic
PICKUP
Step 1
TRIP
Phase 1
Phase 2
Pickup
Phase 3
&
Trip
Output
Logic
PICKUP
Step 2
TRIP
Range or value
(1-200)% of VBase
>95%
-
Voltage protection
PU_ST1_A
PU_ST1_B
PU_ST1_C
PU_ST1
OR
OR
OR
OR
PICKUP
OR
TRIP
OR
ANSI08000012-1-en.vsd
Accuracy
± 0.5% of V at V < V
n
± 0.5% of V at V > V
-
See table 576
Section 7
M13304-1 v5
n
n
245