Voltage protection
M13290-1 v15
Table 72. Two step undervoltage protection UV2PTUV
Function Range or value Accuracy
Operate voltage, low and high step (1.0–100.0)% of
UBase
±0.5% of U
r
Absolute hysteresis (0.0–50.0)% of
UBase
±0.5% of U
r
Internal blocking level, step 1 and step
2
(1–50)% of
UBase
±0.5% of U
r
Inverse time characteristics for step 1
and step 2, see table 210
- See table 210
Definite time delay, step 1 at 1.2 x U
set
to 0
(0.00-6000.00) s ±0.2% or ±40ms whichever is greater
Definite time delay, step 2 at 1.2 x U
set
to 0
(0.000-60.000) s ±0.2% or ±40ms whichever is greater
Minimum operate time, inverse
characteristics
(0.000–60.000) s ±0.5% or ±40ms whichever is greater
Operate time, start at 2 x U
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 1.2 x U
set
to 0 Min. = 5 ms
Max. = 25 ms
-
Reset time, start at 0 to 1.2 x U
set
Min. = 15 ms
Max. = 35 ms
-
Critical impulse time 5 ms typically at 1.2 x U
set
to 0 -
Impulse margin time 15 ms typically -
Line differential protection RED670
1MRK 505 379-BEN N
Hitachi Power Grids 105
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