Définitions - LEGRAND ALPTEC 2333b Notice D'installation

17 Définitions
CBEMA-Curve In 1977 the Computer and Business Equipment Manufacturers Association
provided an energy performance profile for computer equipment known as
the CBEMA curve. Revised by the Information Technology Industry
Council (ITIC) in 1996 it will continue to be referred to as the "CBEMA
Curve". It is a necessary tool in determining the immunity limits in modern
office electronic equipment. Voltage levels and durations at the equipment
terminals, within the tolerance envelope, represent acceptable energy
being Ledivered.
http://www.itic.org/technical/iticurv.pdf
ITIC-Curve See CBEMA-Curve
Coverage The percentage of available data compared to the expected available data
(statistics) for a selected period of time
Device Any measurement equipment.
DISDIP DISDIP was initially the name of workgroup of the UNIPEDE that has been
working on a classification of dips, swells and interruptions. By extension,
the name DISDIP has been given to tables that resulted from this
workgroup.
Electrical Any parameter that might be used to define the shape of an electrical
variable signal. This might be a long or short-term phenomenon, affecting the wave
shape or the RMS values. Ex: Harmonics, dips, flicker...
Event An event is a short size information provided by a PQ device. Events are
usually punctual (dip) but may coverover longer periods (EN50160 report
event). Example:
* A triggering condition was met (dip, flicker...) OR
* A report was issued (EN report, Signaling voltages...) OR
* Information from a device following an normal or abnormal behavior
(reset, clock synchronization...)
* Information provided by the software.
Histogram An histogram is a graphical representation of the evolution of a parameter
where time information is lost and focus is given on the statistical
dispersion of the parameter.
Permanent Unconditional/continuous (usually long term) temporal recording of a
recording variable.
The permanent recording is logged usually at a defined time interval
(typically 10 minutes, one hour...)
Power Quality Any power problem manifested in voltage, current, or frequency deviation
(PQ) that results in failure or misoperation of end-user equipment.
Triggered Recording that start and stop when triggering conditions are met. This type
recording of recording is "finite" in time, contrary to the permanent (continuous)
recordings (10-Min, statistics, User Recordings). Usually the triggering
condition encountered when an electrical variable value overshoots of a
threshold.
User Is a person that will log on the system to use it. It is recommended to use
dedicated log ins for each user and to allocate permissions according to
the authority of each individual on the system. This enables traceability of
all actions and provides security at the same time.