ABB Relion 650 Series Technical Manual page 244

Section 7
Voltage protection
VL1 or VA
VL2 or VB
VL3 or VC
ANSI08000016 V1 EN-US
Figure 122: Schematic design of Two step undervoltage protection UV2PTUV (27)
7.1.8 Technical data
Table 169: UV2PTUV (27) technical data
Function
Operate voltage, low and high step
Reset ratio
Inverse time characteristics for low
and high step, see table
Definite time delay, step 1
Table continues on next page
238
Comparator
V < Pickup1
Voltage Phase
Selector
OpMode1
Comparator
V < Pickup1 1 out of 3
2 out of 3
3 out of 3
Comparator
V < Pickup1
PICKUP
Time integrator
MinVoltSelect
t1
or
Comparator
V < Pickup2
Voltage Phase
Selector
OpMode2
Comparator
1 out of 3
V < Pickup2
2 out of 3
3 out of 3
Comparator
V < Pickup2
PICKUP
Timer
t2
Range or value
577
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Phase1
Phase2
Pickup
Phase3
&
Trip
Output
Logic
Step1
TRIP
Phase1
Phase2
Pickup
Phase3
&
Trip
Output
Logic
Step2
TRIP
VBase
(1–100)% of
<105%
-
(0.00 - 6000.00) s
1MRK 506 326-UUS B
PU_ST1_A
PU_ST1_B
PU_ST1_C
OR
OR
OR
OR
PICKUP
OR
TRIP
OR
ANSI08000016-1-en.vsd
Accuracy
± 0.5% of V
n
-
See table 577
± 0.5% ± 25 ms
Line distance protection REL650
Technical manual
M13290-1 v6