8
CET Electric Technology
Glossary
ATS
= Automatic Transfer Switch
CET
= CET Electric Technology
DI
= Digital Input
DMD
= Present Demand
DO
= Digital Output
FIFO
= First In First Out
Fund.
= Fundamental
GB
= Giga Byte
HMI
= Human Machine Interface
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
IER
= Interval Energy Recorder
I4
= Zero Sequence Current
LED
= Light Emitting Diode
MB
= Mega Byte
MIB
= Management Information Base
MCPM
= Multi Circuit Power Monitor
MMR
= Max/Min Recorder
MXR
= Max Recorder
NMS
= Network Management System
OID
= Object Identifier
PQ
= Power Quality
RTC
= Real Time Clock
RTD
= Resistance Temperature Detector
SCCT
= Split-core CT
SM
= Sub Meter
SNMP
= Simple Network Management Protocol
SOE
= Sequence Of Events
STS
= Static Transfer Switch
TDD
= Total Demand Distortion
TODD
= Total Odd Demand Distortion
TEDD
= Total Even Demand Distortion
TH
= Total Harmonic in RMS, excluding Fundamental
THD
= Total Harmonic Distortion
TOHD
= Total Odd Harmonic Distortion
TEHD
= Total Even Harmonic Distortion
VM
= Virtual Meter
WF
= Waveform
WFR
= Waveform Recorder
Udin
= Declared input voltage - Value obtained from the declared supply voltage by a transducer ratio
Usr
= Sliding Reference Voltage