ABB Relion 670 Series Applications Manual page 243

1MRK 505 370-UUS Rev. K
Section 10
10.1 General current and voltage protection CVGAPC
10.1.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
K
10.1.2 Identification
Function description
General current and voltage protection
10.1.3 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 detect 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
Busbar protection REB670
Application manual
Multipurpose protection
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5 • The harmonic restraint function changed to freeze the definite and IDMT timers.
• The maximum value of the settings IMin1 and IMin2 has been decreased to 1000.0 %
of IBase.
• Setting BlkLevel2nd was removed from the function.
• Previously called stepwise settings t_DefOCx and tResetDef_OCx had their names
changed to t_OCx and tReset_OCx for more clear understanding.
IEC 61850
identification
CVGAPC
© 2017 - 2021 Hitachi Power Grids. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
2(I>/U<) -
Section 10
Multipurpose protection
IP14552-1 v2
GUID-74F9B9A9-91EB-45BA-A883-6BA325C8B272 v1
M14886-2 v3
IP15008-1 v1
M13084-3 v5
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