Directional Phase Overcurrent Protection, Four Steps Oc4Ptoc(51_67) - ABB RES670 Technical Manual

1MRK 511 408-UUS A
Section 8
8.1
8.1.1
8.1.2
Phasor measurement unit RES670 2.2 ANSI
Technical manual
Current protection
Directional phase overcurrent protection, four steps
OC4PTOC(51_67)
Identification
Function description
Directional phase overcurrent
protection, four steps
Functionality
Directional phase overcurrent protection, four steps OC4PTOC (51/67) has
independent inverse time delay settings for steps 1 to 4.
All IEC and ANSI inverse time characteristics are available together with an optional
user defined time characteristic.
The directional function needs voltage as it is voltage polarized with memory. The
function can be set to be directional or non-directional independently for each of the
steps.
A second harmonic blocking level can be set for the function and can be used to block
each step individually.
IEC 61850 IEC 60617
identification identification
OC4PTOC
TOC-REVA V2 EN-US
Section 8
Current protection
SEMOD129998-1 v8
M14885-1 v6
ANSI/IEEE C37.2
device number
51_67
M12846-3 v17
169