ABB RET670 Product Manual page 59

ABB
Transformer protection RET670
Pre-configured
Product version: 1.1
Table 34. Instantaneous residual overcurrent protection EFPIOC
Function
Operate current
Reset ratio
Operate time
Reset time
Critical impulse time
Operate time
Reset time
Critical impulse time
Dynamic overreach
Range or value
(1-2500)% of lBase
> 95%
25 ms typically at 0 to 2 x I
25 ms typically at 2 to 0 x I
10 ms typically at 0 to 2 x I
10 ms typically at 0 to 10 x I
35 ms typically at 10 to 0 x I
2 ms typically at 0 to 10 x I
< 5% at t = 100 ms
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
-
-
set
-
set
-
set
-
set
-
set
-
set
-
r
r
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