6.2.9 Technical data
Table 36: OC4PTOC (51/67) technical data
Function
Setting range Accuracy
Operate current (5-2500)% of
lBase
± 1.0% of I
n
at I ≤ I
n
± 1.0% of I at I > I
n
Reset ratio > 95% at (50–2500)% of
lBase
-
Min. operating current (5-10000)% of
lBase
± 1.0% of I
n
at I ≤ I
n
±1.0% of I at I > I
n
2nd harmonic blocking (5–100)% of fundamental
± 2.0% of I
n
Independent time delay (0.000-60.000) s
± 0.5% ±25 ms
Minimum operate time for
inverse characteristics
(0.000-60.000) s
± 0.5% ±25 ms
Inverse characteristics, see
table 573, table 574 and table
575
15 curve types
1)
ANSI/IEEE C37.112
IEC 60255–151
±3% or ±40 ms
0.10 ≤ k ≤ 3.00
1.5 x I
set
≤ I ≤ 20 x I
set
Operate time, nondirectional
pickup function
25 ms typically at 0 to 2 x I
set
-
Reset time, pickup function 35 ms typically at 2 to 0 x I
set
-
Operate time, directional pickup
function
50 ms typically at 0 to 2 x I
set
-
Reset time, directional pickup
function
35 ms typically at 2 to 0 x I
set
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
1)
Note: Timing accuracy only valid when 2nd harmonic blocking is turned off
6.3 Instantaneous residual overcurrent protection EFPIOC
(50N)
6.3.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Instantaneous residual overcurrent
protection
EFPIOC
IEF V1 EN
50N
1MRK 511 287-UUS A Section 6
Current protection
95
Technical manual