Multipurpose Protection; General Current And Voltage Protection Cvgapc; Function Revision History; Identification - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
Section 11
11.1

General current and voltage protection CVGAPC

11.1.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
J
K
M
N
11.1.2

Identification

Function description
General current and voltage protection
11.1.3

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
Phasor measurement unit RES670
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.
2.2.6 -
2.2.6 Minimum value changed to 0.01 for k_OC1 and k_OC2 settings
IEC 61850
identification
CVGAPC
© 2017 - 2023 Hitachi Energy. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
2(I>/U<) -
Section 11
Multipurpose protection
IP14552-1 v2
GUID-74F9B9A9-91EB-45BA-A883-6BA325C8B272 v2
M14886-2 v3
IP15008-1 v1
M13084-3 v5
169