ABB RET670 Product Manual page 63

ABB
Transformer protection RET670
Customized
Product version: 1.2
Table 53. Broken conductor check BRCPTOC
Function
Minimum phase current for operation
Unbalance current operation
Timer
Table 54. Capacitor bank protection CBPGAPC
Function
Operate value, overcurrent
Reset ratio, overcurrent
Operate time, start
Reset time, start
Critical impulse time, overcurrent protection
start
Impulse margin time, overcurrent protection
start
Operate value, undercurrent
Reset ratio, undercurrent
Operate value, reconnection inhibit function
Operate value, reactive power overload
function
Operate value, voltage protection function
for harmonic overload (Definite time)
Operate value, voltage protection function
for harmonic overload (Inverse time)
Inverse time characteristic
Maximum trip delay, harmonic overload
IDMT
Minimum trip delay, harmonic overload IDMT
Timers
Range or value
(5–100)% of IBase
(0–100)% of maximum current
(0.00-6000.00) s
Range or value
(0-900)% of lBase
>95%
10 ms typically
30 ms typically
2 ms typically at 0.5 to.2xIset
1 ms typically at 0.5 to 10xIset
15 ms typically
(5-100)% of IBase
<105%
(4-1000)% of IBase
(5-900)%
(5-500)%
(80-200)%
According to IEC60871-1 (2005) and
IEEE/ANSI C37.99 (2000)
(0.05-6000.00) s
(0.05-60.00) s
(0.00-6000.00) s
1MRK 504 117-BEN D
Accuracy
± 0.1% of I
r
± 0.1% of I
r
± 0.5% ± 10 ms
Accuracy
± 1.0% of I at I < I
r r
± 1.0% of I at I > I
r
-
-
-
-
± 1.0% of I at I < I
r r
± 1.0% of I at I > I
r
-
± 1.0% of I at I < I
r r
± 1.0% of I at I > I
r
± 1.0% of Sr at S < S
± 1.0% of S at S > S
± 0.5% of U at U<U
r
± 0.5% of U at U>U
r
± 0.5% of U at U<U
r
± 0.5% of U at U>U
r
10% + 50 ms
± 0.5% ± 10 ms
± 0.5% ± 10 ms
± 0.5% ± 10 ms
r
r
r
r
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