CET Electric Technology
8
Glossary
DMD
= Present Demand
DWR
= Disturbance Waveform Recorder
FIFO
= First In First Out
Fund.
= Fundamental
GB
= Giga Byte
GPS
= Global Positioning System
HS
= High-Speed
Hn
= nth order Harmonic, integer multiple (n) of the Fundamental Frequency (50Hz or 60Hz)
IHn
= nth order Interharmonic represents all components between the (n-1)th and nth harmonic orders in RMS
HDn
= nth order Harmonic Distortion
IHDn
= nth order Interharmonic Distortion
Hn
= nth order Harmonic in RMS
IHn
= nth order Interharmonic in RMS
LCD
= Liquid Crystal Display
MB
= Mega Byte
Pred_DMD
= Predicted Demand
Plt
= Long-term Flicker
Pst
= Short-term Flicker
PQ
= Power Quality
RTC
= Real Time Clock
SDR
= Statistical Data Recorder
SOE
= Sequence of Events (PQ events)
SMTP
= Simple Mail Transfer Protocol
TH
= Total Harmonic in RMS, excluding Fundamental
THD
= Total Harmonic Distortion
TOHD
= Total Odd Harmonic Distortion
TEHD
= Total Even Harmonic Distortion
U0 / I0
= Zero Sequence Voltage / Current
U1 / I1
= Positive Sequence Voltage / Current
U2 / I2
= Negative Sequence Voltage /Current
U0 / I0 Unb
= Zero Sequence Voltage / Current Unbalance
U2 / I2 Unb
= Negative Sequence Voltage / Current Unbalance
WF
= Waveform
WFR
= Waveform Recorder
Swell
= Temporary increases in RMS value of AC voltage
Transient
=Unidirectional impulse of either polarity or a damped oscillatory wave with the first peak occurring in
either polarity
U
rms(1/2)
= Half-Cycle RMS Voltage
U
din
= Declared input voltage - Value obtained from the declared supply voltage by a transducer ratio
U
sr
= Sliding Reference Voltage
I
half cycle rms
= Value of the RMS Current measured over each half period
I
Normal
= Normal Full-load Current
U
ll Normal
= Normal line-to-line Voltage
Dip Threshold
= Voltage magnitude specified for the purpose of detecting the start and end of a voltage dip
Flagged data
= For any measurement time interval in which interruptions, dips or swells occur, the measurement results
of all other parameters made during this time interval are flagged
Summary of Contents for PMC-690
Page 1: ...PMC 690 Hand Held Power Quality Analyzer User Manual Version V1 0A Aug 27 2018...
Page 21: ...CET Electric Technology 21 Energy Demand Harmonics Spectrum Table Power...
Page 23: ...CET Electric Technology 23 Max Min Setup Basic Device Storage...
Page 24: ...CET Electric Technology 24 Advanced...
Page 26: ...CET Electric Technology 26 Monitoring History Table 3 2 Description of each Hierarchy...