Hitachi Relion 670 Series Applications Manual page 267

1MRK511407-UUS Rev. N
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.
Phasor measurement unit RES670
Application manual
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Section 16
Monitoring
261