ABB Relion REC670, Applications Manual

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Section 11 Multipurpose protection
11.1 General current and voltage protection CVGAPC
IP14552-1 v2
11.1.1 Identification
M14886-2 v3
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
General current and voltage protection CVGAPC 2(I>/U<) -
11.1.2 Application
IP15008-1 v1
M13084-3 v4
A breakdown of the insulation between phase conductors or a phase conductor and
ground results in a short circuit or a ground fault respectively. Such faults can result in
large fault currents and may cause severe damage to the power system primary
equipment. Depending on the magnitude and type of the fault different overcurrent
protections, based on measurement of phase, ground or sequence current components
can be used to clear these faults. Additionally it is sometimes required that these
overcurrent protections shall be directional and/or voltage controlled/restrained.
The over/under voltage protection is applied on power system elements, such as
generators, transformers, motors and power lines in order to detect abnormal voltage
conditions. Depending on the type of voltage deviation and type of power system
abnormal condition different over/under voltage protections based on measurement of
phase-to-ground, phase-to-phase, residual- or sequence- voltage components can be
used to detect and operate for such incident.
The IED can be provided with multiple General current and voltage protection
(CVGAPC) protection modules. The function is always connected to three-phase
current and three-phase voltage input in the configuration tool, but it will always
measure only one current and one voltage quantity selected by the end user in the
setting tool.
Each CVGAPC function module has got four independent protection elements built
into it.
1. Two overcurrent steps with the following built-in features:
1MRK 511 401-UUS A
Section 11
Multipurpose protection
Bay control REC670 2.2 ANSI 269
Application manual