ABB Relion 670 Series Product Manual page 71

Line differential protection RED670 2.0
Product version: 2.0
Voltage protection
Table 55. Two step undervoltage protection UV2PTUV
Function
Operate voltage, low and high step
Absolute hysteresis
Internal blocking level, step 1 and step 2
Inverse time characteristics for step 1 and step 2, see table
Definite time delay, step 1 at 1.2 to 0 x U
Definite time delay, step 2 at 1.2 to 0 x U
Minimum operate time, inverse characteristics
Operate time, start at 2 to 0 x U
Reset time, start at 0 to 2 x U
Operate time, start at 1.2 to 0 x U
Reset time, start at 0 to 1.2 x U
Critical impulse time
Impulse margin time
ABB
set
set
set
set
set
set
Range or value
UBase
(1.0–100.0)% of
(0.0–50.0)% of UBase
UBase
(1–50)% of
135 -
(0.00-6000.00) s
(0.000-60.000) s
(0.000–60.000) s
Min= 15 ms
Max= 30 ms
Min= 15 ms
Max= 30 ms
Min= 5 ms
Max= 25 ms
Min= 15 ms
Max= 35 ms
5 ms typically at 1.2 to 0 x U
15 ms typically
1MRK505310-BEN C
Accuracy
±0.5% of U
r
±0.5% of U
r
±0.5% of U
r
See table 135
±0.2% or ±40ms whichever is
greater
±0.2% or ±40ms whichever is
greater
±0.2% or ±40ms whichever is
greater
-
-
-
-
-
set
-
71