M13304-1 v12
Table 64. 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
-
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
-
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
ABB
87
