Four Step Phase Overcurrent Protection 3-Phase Output Oc4Ptoc; Identification; Functionality - ABB RET650 Technical Manual

1MRK 504 135-UEN A
8.2
8.2.1
8.2.2
Technical manual
Function
Reset time
Critical impulse time
Operate time
Reset time
Critical impulse time
Dynamic overreach
Four step phase overcurrent protection 3-phase
output OC4PTOC

Identification

Function description
Four step phase overcurrent protection
3-phase output

Functionality

The four step phase overcurrent protection function, 3-phase output OC4PTOC has an
inverse or definite time delay independent for step 1 and 4 separately. Step 2 and 3 are
always definite time delayed.
All IEC and ANSI inverse time characteristics are available.
The directional function is voltage polarized with memory. The function can be set to
be directional or non-directional independently for each of the steps.
Second harmonic blocking level can be set for the function and can be used to block
each step individually
Range or value
30 ms typically at 2 to 0 x I
set
10 ms typically at 0 to 2 x I
set
10 ms typically at 0 to 5 x I
set
40 ms typically at 5 to 0 x I
set
2 ms typically at 0 to 5 x I
set
< 5% at t = 100 ms
IEC 61850 IEC 60617
identification identification
OC4PTOC
TOC-REVA V1 EN
Section 8
Current protection
Accuracy
-
-
-
-
-
-
ANSI/IEEE C37.2
device number
51/67
3I>
4
alt
4
143