ABB Relion REQ650, Product Manual

Page: 57 / 91

Table 25. Instantaneous residual overcurrent protection EFPIOC (50N)
Function Range or value Accuracy
Operate current (1-2500)% of lBase
±
1.0% of I
n
at I
£
I
n
±
1.0% of I at I > I
n
Reset ratio > 95% -
Operate time 20 ms typically at 0 to 2 x I
set
-
Reset time 30 ms typically at 2 to 0 x I
set
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Operate time 10 ms typically at 0 to 10 x I
set
-
Reset time 40 ms typically at 10 to 0 x I
set
-
Critical impulse time 2 ms typically at 0 to 10 x I
set
-
Dynamic overreach
< 5% at
t
= 100 ms
-
Breaker protection REQ650 ANSI 1MRK 505 269-BUS -
Product version: 1.1 Issued: April 2011
ABB 57