ABB Relion 650 series RET650 Product Manual page 50

Transformer protection RET650
Product version: 1.1
Current protection
Table 24. Instantaneous phase overcurrent protection PHPIOC
Function
Operate current
Reset ratio
Operate time
Reset time
Critical impulse time
Operate time
Reset time
Critical impulse time
Dynamic overreach
50
Range or value
(5-2500)% of lBase
> 95%
20 ms typically at 0 to 2 x I
35 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
45 ms typically at 10 to 0 x I
2 ms typically at 0 to 10 x I
< 5% at t = 100 ms
1MRK 504 127-BEN -
Issued: February 2011
Accuracy
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
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set
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set
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set
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set
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set
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set
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r
r
ABB