ABB Relion REG670, Technical Manual

Page: 359 / 1298

There is also a possibility to activate a preset change of the set operation current via
a binary input (enable multiplier MULTEN). In some applications the operation value
needs to be changed, for example due to transformer inrush currents.
EFPIOC function can be blocked from the binary input BLOCK. The trip signals from
the function can be blocked from the binary input BLKAR, that can be activated
during single pole trip and autoreclosing sequences.
8.3.8 Technical data
Table 171: EFPIOC technical data
Function Range or value Accuracy
Operate current (5-2500)% of lBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio > 95% at (50–2500)% of
lBase
-
Operate 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
-
Operate 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
8.4.1 Identification
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
51N/67N
1MRK502052-UEN B
Section 8
Current protection
353
Technical manual