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12 Glossary
Gateway
A dedicated computer that attaches to two or more networks
and routes packets from one to the other. In networking, a
device that connects two systems that use different protocols.
GPS
Global positioning system.
Harmonic
The components of the harmonic content as expressed in
terms of the order and rms values of the Fourier series terms,
describing the periodic function.
Ia, Ib, Ic
Phase currents for phases a, b and c respectively.
IMPACC
TM
Standard Cutler-Hammer Integrated Monitoring, Protection
And Control Communications protocol definition for communi
-
cation on the INCOM network.
INCOM
TM
Cutler-Hammer INdustrial COMmunications network.
K-Factor
A derating factor related to the sum of the squares of har-
monic current times the squares of their harmonic numbers
(multiples of the fundamental).
kVA (Kilovolt-Ampere)
One that designates the input kVA or volt-amperes at rated
primary voltage with the secondary terminal short-circuited.
kVAh
Kilovolt-ampere hour.
kVAh
Kilovolt-ampere reactive.
kvarh
Kilovolt amps reactive hours.
kW
Kilowatt.
kWh
Kilowatt hour.
Lag
The phase delay in current with respect to voltage.
Load Profile
The magnitude and duration of loads applied in a prescribed
time sequence, including the transient and steady-state char-
acteristics of the individual loads. The recording, storage and
analysis of consumption data over a period of time for a
particular installation.
Load Shed
The process of deliberately removing preselected loads from
a power system in response to an abnormal condition in order
to maintain the integrity of the system.
mA
MilliAmpere.
mV
MilliVolt.
Maximum Demand
See Peak Demand.
Modbus
A popular industrial communication protocol.
MVAR
Megavolt amperes reactive.
MVARh
Megavolt amperes reactive hours.
MWh
Megawatt hours.
NTP
Network time protocol.
Peak Demand
The greatest of all the demands that have occurred during a
specified period of time; determined by measurement over a
prescribed time interval.
PFA
See, “Power factor”, Apparent.
Содержание Power Xpert PXM 4000
Страница 1: ...User and Installation Manual IM02601004E Power Xpert PXM 4000 6000 8000 ...
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Страница 36: ...Page 18 IM02601004E www eaton com 2 Quick Start Guide for the Meter Module ...
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