General Current And Voltage Protection Cvgapc - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
Section 12
12.1
12.1.1
12.1.2
Line distance protection REL670 2.2 ANSI
Application manual
Multipurpose protection

General current and voltage protection CVGAPC

Identification
Function description
General current and voltage protection
Application
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:
Multipurpose protection
IEC 61850 IEC 60617
identification identification
CVGAPC 2(I>/U<)
Section 12
ANSI/IEEE C37.2
device number
-
599