ABB Relion 670 series, Technical Manual

Page: 476 / 1432

8.3.8 Technical data
IP11450-1 v1
M12340-2 v8
Table 226: EFPIOC (50N) technical data
Function Range or value Accuracy
Trip current (5-2500)% of lBase ±1.0% of I
n
at I ≤ I
n
±1.0% of I
n
at I > I
n
Reset ratio > 95% at (50–2500)% of lBase -
Trip time at 0 to 2 x I
set
Min. = 15 ms
Max. = 25 ms
-
Reset time at 2 to 0 x I
set
Min. = 15 ms
Max. = 25 ms
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Trip time at 0 to 10 x I
set
Min. = 5 ms
Max. = 15 ms
-
Reset time at 10 to 0 x I
set
Min. = 25 ms
Max. = 35 ms
-
Critical impulse time 2 ms typically at 0 to 10 x I
set
-
Dynamic overreach
< 5% at t = 100 ms
-
8.4 Four step residual overcurrent protection, (Zero
sequence or negative sequence directionality) EF4PTOC
(51N/67N)
IP14509-1 v6
8.4.1 Identification
M14881-1 v5
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Four step residual overcurrent
protection
EF4PTOC
4(IN>)
4
alt
4
TEF-REVA V2 EN-US
51N_67N
8.4.2 Functionality
M13667-3 v18
The four step residual overcurrent protection EF4PTOC (51N/67N) has an inverse or definite time
delay independent for each step.
All IEC and ANSI time-delayed characteristics are available together with an optional user defined
characteristic.
EF4PTOC (51N/67N) can be set directional or non-directional independently for each of the steps.
Section 8 1MRK 502 066-UUS B
Current protection
470
Technical manual