ABB RED670 - Page 74

Table 60. Broken conductor check BRCPTOC
Function Range or value Accuracy
Minimum phase current for operation (5–100)% of IBase ±1.0% of I
r
Unbalance current operation (50–90)% of maximum current ±1.0% of I
r
Independent operate time delay (0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Independent reset time delay (0.010-60.000) s ±0.2% or ±30 ms whichever is greater
Start time at current change from I
r
to 0 Min. = 25 ms
Max. = 35 ms
-
Reset time at current change from 0 to I
r
Min. = 5 ms
Max. = 20 ms
-
1MRK 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
74 ABB