Functionality - ABB REL650 series Technical Manual

1MRK 506 335-UUS A
7.4.2
7.4.3
7.4.4
Technical manual

Functionality

The four step phase overcurrent function for single pole tripping OC4SPTOC (51_67) has
an inverse or definite time delay independent for each step separately.
All IEC and ANSI time delayed 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.
The tripping can be configured for one- and/or three-phase.
Function block
OC4SPTOC (51_67)
I3P TRIP
V3P* TRST1
BLOCK TRST2
BLK1 TRST3
BLK2 TRST4
BLK3 TR_A
BLK4 TR_B
TR_C
PICKUP
PU_ST1
PU_ST2
PU_ST3
PU_ST4
PU_A
PU_B
PU_C
PU2NDHARM
ANSI10000216-3-en.vsd
ANSI10000216 V3 EN
Figure 95: OC4SPTOC (51_67) function block
Signals
Table 90: OC4SPTOC (51_67) Input signals
Name Type
I3P GROUP
SIGNAL
U3P GROUP
SIGNAL
BLOCK BOOLEAN
BLKST1 BOOLEAN
Table continues on next page
Default Description
- Three phase group signal for current inputs
- Three phase group signal for voltage inputs
0 Block of function
0 Block of step 1
Section 7
Current protection
205