ABB Relion 670 Series Product Manual page 70

Line differential protection RED670 2.0
Product version: 2.0
Table 54. Broken conductor check BRCPTOC
Function
Minimum phase current for operation
Unbalance current operation
Independent operate time delay
Independent reset time delay
Start time at current change from I
Reset time at current change from 0 to I
70
Range or value
(5–100)% of IBase
(50–90)% of maximum current
(0.000-60.000) s
(0.010-60.000) s
to 0 Min. = 25 ms
r
Max. = 35 ms
Min. = 5 ms
r
Max. = 20 ms
Accuracy
±1.0% of I
r
±1.0% of I
r
±0.2% or ±45 ms whichever is greater
±0.2% or ±30 ms whichever is greater
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1MRK505310-BEN C
ABB