ABB REC670 2.1 IEC - Page 46

Differential protection
M13081-1 v11
Table 28. 1Ph High impedance differential protection HZPDIF
Function Range or value Accuracy
Operate voltage (10-900) V
I=U/R
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio >95% at (30-900) V -
Maximum continuous power
U>Trip
2
/SeriesResistor ≤200 W
-
Operate time at 0 to 10 x U
d
Min. = 5 ms
Max. = 15 ms
Reset time at 10 to 0 x U
d
Min. = 75 ms
Max. = 95 ms
Critical impulse time 2 ms typically at 0 to 10 x U
d
-
Operate time at 0 to 2 x U
d
Min. = 25 ms
Max. = 35 ms
Reset time at 2 to 0 x U
d
Min. = 50 ms
Max. = 70 ms
Critical impulse time 15 ms typically at 0 to 2 x U
d
-
1MRK 511 361-BEN B
Bay control REC670 2.1 IEC
Product version: 2.1
46 ABB