ABB Relion 650 Series Technical Manual page 173

1MRK 506 326-UUS B
Function
Independent time delay
Minimum operate time for
inverse characteristics
Inverse characteristics, see
table 573, table
575
Operate time, nondirectional
pickup function
Reset time, pickup function
Operate time, directional
pickup function
Reset time, directionalpickup
function
Critical impulse time
Impulse margin time
6.5 Instantaneous residual overcurrent protection EFPIOC
(50N)
6.5.1 Identification
Function description
Instantaneous residual overcurrent
protection
6.5.2 Functionality
The Instantaneous residual overcurrent protection EFPIOC (50N) has a low transient overreach
and short tripping times to allow the use for instantaneous ground-fault protection, with the
reach limited to less than the typical eighty percent of the line at minimum source impedance.
EFPIOC (50N) can be configured to measure the residual current from the three-phase current
inputs or the current from a separate current input. EFPIOC (50N) can be blocked by activating the
input BLOCK.
Line distance protection REL650
Technical manual
Setting range
(0.000-60.000) s
(0.000-60.000) s
17 curve types
574 and table
20 ms typically at 0 to 2 x I
30 ms typically at 2 to 0 x I
30 ms typically at 0 to 2 x I
25 ms typically at 2 to 0 x I
10 ms typically at 0 to 2 x I
15 ms typically
IEC 61850
identification
EFPIOC
© Copyright 2011 ABB Power Grids. All rights reserved
Accuracy
± 0.5% ± 25 ms
± 0.5% ± 25 ms
See table 573, table
table
-
set
-
set
-
set
-
set
-
set
-
IEC 60617 ANSI/IEEE C37.2
identification device number
50N
IN>>
IEF V1 EN-US
Section 6
Current protection
574 and
575
IP14508-1 v3
M14887-1 v3
M12701-3 v8
167