Section 10 Multipurpose Protection; General Current And Voltage Protection Cvgapc; Identification; Application - ABB Relion 670 Series Applications Manual

1MRK 511 358-UUS A
Section 10
10.1

General current and voltage protection CVGAPC

10.1.1

Identification

Function description
General current and voltage
protection
10.1.2

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:
Application manual
Multipurpose protection
IEC 61850
identification
CVGAPC
IEC 60617 ANSI/IEEE C37.2
identification device number
2(I>/U<) -
Section 10
Multipurpose protection
IP14552-1 v2
M14886-2 v3
IP15008-1 v1
M13084-3 v4
225