Three-Phase Voltage-Dependent Overcurrent Protection Phpvoc; Identification; Function Block; Functionality - ABB RELION REX640 Technical Manual

1MRS759142 C
4.1.3
4.1.3.1
4.1.3.2
4.1.3.3
4.1.3.4
REX640
Technical Manual
Three-phase voltage-dependent overcurrent protection
PHPVOC

Identification

Function description
Three-phase voltage-dependent
overcurrent protection

Function block

GUID-99276729-9AA6-4988-A7D8-D6EE31C65E97 V1 EN
Figure 197: Function block

Functionality

The three-phase voltage-dependent overcurrent protection function PHPVOC is used
for single-phase, two-phase or three-phase voltage-dependent time overcurrent
protection of generators against overcurrent and short circuit conditions.
PHPVOC starts when the input phase current exceeds a limit which is dynamically
calculated based on the measured terminal voltages. The operating characteristics can
be selected to be either inverse definite minimum time IDMT or definite time DT.
PHPVOC contains a blocking functionality. It is possible to block function outputs,
timers or the function itself.

Analog channel configuration

PHPVOC has two analog group inputs which all must be properly configured.
Table 388: Analog inputs
Input
I3P
U3P
See the preprocessing function blocks in this document for the
possible signal sources.
Protection functions
IEC 61850 IEC 60617
identification identification
PHPVOC 3I(U)>
Description
Three-phase currents
Three-phase voltages
Section 4
ANSI/IEEE C37.2
device number
51V
349