ABB Relion 650 series RET650 Product Manual page 57

ABB
Transformer protection RET650
Product version: 1.1
Voltage protection
Table 33. Two step undervoltage protection UV2PTUV
Function
Operate voltage, low and
high step
Reset ratio
Inverse time characteristics
for low and high step, see
table 65
Definite time delay, step 1
Definite time delays, step 2
Minimum operate time,
inverse characteristics
Operate time, start function
Reset time, start function
Critical impulse time
Impulse margin time
Table 34. Two step overvoltage protection OV2PTOV
Function
Operate voltage, low and
high step
Reset ratio
Inverse time characteristics
for low and high step, see
table 64
Definite time delay, step 1
Definite time delays, step 2
Minimum operate time,
Inverse characteristics
Operate time, start function
Reset time, start function
Critical impulse time
Impulse margin time
Range or value
(1–100)% of UBase
<105%
-
(0.00 - 6000.00) s
(0.000-60.000) s
(0.000–60.000) s
30 ms typically at 2 to 0.5 x U
40 ms typically at 0.5 to 2 x U
10 ms typically at 2 to 0 x U
15 ms typically
Range or value
(1-200)% of UBase
>95%
-
(0.00 - 6000.00) s
(0.000-60.000) s
(0.000-60.000) s
30 ms typically at 0 to 2 x U
40 ms typically at 2 to 0 x U
10 ms typically at 0 to 2 x U
15 ms typically
1MRK 504 127-BEN -
Issued: February 2011
Accuracy
± 0.5% of U
r
-
See table 65
± 0.5% ± 25 ms
± 0.5% ±25 ms
± 0.5% ± 25 ms
-
set
-
set
-
set
-
Accuracy
± 0.5% of U at U < U
r
± 0.5% of U at U > U
-
See table 64
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.5% ± 25 ms
-
set
-
set
-
set
-
r
r
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