ABB REG670 - Functionality; Identification

8.2.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Four step phase overcurrent protection
3-phase output
OC4PTOC
TOC-REVA V2 EN
51/67
8.2.2 Functionality
The four step three-phase overcurrent protection function OC4PTOC has an inverse
or definite time delay independent for step 1 to 4 separately.
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.
Second harmonic blocking level can be set for the function and can be used to block
each step individually
Section 8 1MRK502052-UEN B
Current protection
336
Technical manual