Table 58. Two step overvoltage protection OV2PTOV
Function Range or value Accuracy
Operate voltage, step 1 and 2 (1.0-200.0)% of
UBase
±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Absolute hysteresis (0.0–50.0)% of
UBase
±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Inverse time characteristics for steps 1 and 2, see table 120 - See table 120
Definite time delay, low step (step 1) at 0 to 1.2 x U
set
(0.00 - 6000.00) s ±0.2% or ±45 ms whichever is greater
Definite time delay, high step (step 2) at 0 to 1.2 x U
set
(0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Minimum operate time, Inverse characteristics (0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 to 0 x U
set
Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 1.2 x U
set
Min. = 20 ms
Max. = 35 ms
-
Reset time, start at 1.2 to 0 x U
set
Min. = 5 ms
Max. = 25 ms
-
Critical impulse time 10 ms typically at 0 to 2 x U
set
-
Impulse margin time 15 ms typically -
Table 59. Two step residual overvoltage protection ROV2PTOV
Function
Range or value Accuracy
Operate voltage, step 1 and step 2 (1.0-200.0)% of
UBase
± 0.5% of U
r
at U ≤ U
r
± 0.5% of U at U > U
r
Absolute hysteresis (0.0–50.0)% of
UBase
± 0.5% of U
r
at U ≤ U
r
± 0.5% of U at U > U
r
Inverse time characteristics for low and high step, see table 122 - See table 122
Definite time delay low step (step 1) at 0 to 1.2 x U
set
(0.00–6000.00) s ± 0.2% or ± 45 ms whichever is
greater
Definite time delay high step (step 2) at 0 to 1.2 x U
set
(0.000–60.000) s ± 0.2% or ± 45 ms whichever is
greater
Minimum operate time (0.000-60.000) s ± 0.2% or ± 45 ms whichever is
greater
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 to 0 x U
set
Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 1.2 x U
set
Min. = 20 ms
Max. = 35 ms
-
Reset time, start at 1.2 to 0 x U
set
Min. = 5 ms
Max. = 25 ms
-
Critical impulse time 10 ms typically at 0 to 2 x U
set
-
Impulse margin time 15 ms typically -
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 73
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