ABB Relion 650 Series Product Manual page 29

Busbar protection REB650
Version 1.1 ANSI
Table 23. Four step residual overcurrent protection EF4PTOC (51N/67N)
Function
Operate current
Reset ratio
Operate current for directional
comparison
Min. operating current
Minimum operate time for
inverse characteristics
Timers
Inverse characteristics, see
table 52, table 53 and table
Minimum polarizing voltage
Minimum polarizing current
Real part of source Z used for
current polarization
Imaginary part of source Z
used for current polarization
Operate time, non-directional
pickup function
Reset time, non-directional
pickup function
Operate time, directional
pickup function
Reset time, directional pickup
function
ABB Power Grids
Range or value
(1-2500)% of lBase
> 95%
lBase
(1–100)% of
(1-10000)% of lBase
(0.000-60.000) s
(0.000-60.000) s
17 curve types
54
VBase
(1–100)% of
IBase
(2-100)% of
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
30 ms typically at 0.5 to 2 x I
30 ms typically at 2 to 0.5 x I
30 ms typically at 0,5 to 2 x I
30 ms typically at 2 to 0,5 x I
© Copyright 2011 ABB Power Grids. All rights reserved
M15223-1 v7
set
set
N
N
1MRK 505 265-BUS B
Accuracy
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
-
± 1.0% of I
n
± 1.0% of I at I < I ± 1.0% of I
n n
at I < I
n
± 0.5% ± 25 ms
± 0.5% ±25 ms
See table 52, table 53 and table
54
± 0.5% of V
n
±1.0% of I
n
-
-
-
-
-
-
29