Differential protection
M13081-1 v6
Table 21. 1Ph High impedance differential protection HZPDIF (87)
Function
Range or value
Accuracy
Operate voltage
(20-400) V
I=V/R
± 1.0% of I
n
Reset ratio
>95%
-
Maximum continuous voltage
V>Pickup
2
/series resistor ≤200 W
-
Operate time
15 ms typically at 0 to 10 x V
d
-
Reset time
90 ms typically at 10 to 0 x V
d
-
Critical impulse time
2 ms typically at 0 to 10 x V
d
-
Busbar protection REB650
1MRK 505 265-BUS B
Version 1.1 ANSI
ABB Power Grids
27
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