ABB Relion 670 Series Applications Manual page 411

1MRK 505 370-UUS Rev. K
WrnLimit5thHD: It defines the warning limit for the calculated fifth harmonic distortion. According to
standard IEEE 519-2014, harmonic voltage distortions on power system 161 kV and above is limited to
1.0% for each individual harmonic.
tDelayAlm5thHD: It defines the alarm time limit for the calculated fifth harmonic distortion which is applied
after the warning signal pickup and depends on its sustainability.
WrnLimit6thHD: It defines the warning limit for the calculated sixth harmonic distortion. According to
standard IEEE 519-2014, harmonic voltage distortions on power system 161 kV and above is limited to
1.0% for each individual harmonic.
tDelayAlm6thHD: It defines the alarm time limit for the calculated sixth harmonic distortion which is
applied after the warning signal pickup and depends on its sustainability.
WrnLimit7thHD: It defines the warning limit for the calculated seventh harmonic distortion. According to
standard IEEE 519-2014, harmonic voltage distortions on power system 161 kV and above is limited to
1.0% for each individual harmonic.
tDelayAlm7thHD: It defines the alarm time limit for the calculated seventh harmonic distortion which is
applied after the warning signal pickup and depends on its sustainability.
WrnLimit8thHD: It defines the warning limit for the calculated eighth harmonic distortion. According to
standard IEEE 519-2014, harmonic voltage distortions on power system 161 kV and above is limited to
1.0% for each individual harmonic.
tDelayAlm8thHD: It defines the alarm time limit for the calculated eighth harmonic distortion which is
applied after the warning signal pickup and depends on its sustainability.
WrnLimit9thHD: It defines the warning limit for the calculated ninth harmonic distortion. According to
standard IEEE 519-2014, harmonic voltage distortions on power system 161 kV and above is limited to
1.0% for each individual harmonic.
tDelayAlm9thHD: It defines the alarm time limit for the calculated ninth harmonic distortion which is
applied after the warning signal pickup and depends on its sustainability.
14.12 Fault current and voltage monitoring function FLTMMXU
14.12.1 Function revision history
Document
revision
A
B
C
D
E
F
G
J
K
Busbar protection REB670
Application manual
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 -
2.2.5 New function release
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Section 14
Monitoring
GUID-B976D374-CB18-441E-9A12-D4B351D6BF7F v1
GUID-0AA99E78-0C76-48B5-AA00-8E3201C0D263 v1
405