Salicru SLC TWIN series User Manual - page 28
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SALICRU
source. Also it is know as EMI due to its English
acronym (ElectroMagnetic Interference), Radio
Frequency Interference or RFI. This perturbation
can break, damage or limit the efficiency of the
circuit.
•IGBT
The Insulated Gate Bipolar Transistor is a semi-
conductor device that is used as a controlled
switch in power electronic circuits. This device
has the feature of the gate signal of the field
effect transistors with the capacity of high cur-
rent and low voltage saturation of the bipolar
transistor, combining an isolated FET gate for
the input and control and a bipolar transistor as
switch in a single device. The triggering circuit of
the IGBT is as the MOSFET one, while the driving
features are likes the BJT.
•Interface
In electronic, telecommunications and hard-
ware, an interface (electronic) is the port (phys-
ical circuit) through which are sent or received
signals from a system or subsystems toward
others.
•Inverter
An inverter, is a circuit used to convert direct
current into alternating current. The function of
an inverter is to change an input voltage of di-
rect current into a symmetrical output voltage
of alternating current, with the required magni-
tude and frequency by the user or the designer.
•kVA
The voltampere is the unit of the apparent power
in electrical current. In direct current is almost
equal to the real power but in alternating cur-
rent can defer depending on the power factor.
•LCD
LCD acronym of Liquid Crystal Display, device in-
vented by Jack Janning, who was employee of
NCR. It is an electrical system of data presenta-
tion based on 2 transparent conductor layers and
in the middle a special crystal liquid that have the
capacity to orientate the light when trespassing.
•LED
LED acronym of Light Emitting Diode, is a semi-
conductor device (diode) that emits light almost
monochrome with a very narrow spectrum,
it means, when it is direct polarized and it is
crossed by an electric current. The colour, (wave
longitude), depends on the semiconductor ma-
terial used in its manufacturing, being able to
vary from the ultraviolet one, going through the
visible spectrum light, to the infrared, receiving
these last ones the denomination of IRED (Infra
Red Emitting Diode).
•Circuit breaker A circuit breaker or switch, is a device able to
break the electrical current of a circuit when it
overcomes the maximum set values.
•Off-Line mode Regarding to an equipment, it is Off-line when
it is disconnected from the system, it is out of
service, and usually has its power supply turned
off, so it means that is shutdown.
•On-Line mode Regarding to an equipment, it is on line when it is
connected to the system, and it is in operation,
and usually has its power supply turned on.
•Rectifier
In electronic, a rectifier is the element or circuit
that allows to convert the alternating current
into direct current. This is done by rectifier di-
odes, which can be solid state semiconduc-
tors, vacuum or gassy valves like the mercury
vapour. Depending on the features of the alter-
nating current power supply used, it is classified
as single phase, when they are fed by a single
phase electrical mains, or three phase when
they are fed by the three phases. Depending on
the rectification type, they can be half wave,
when only one of the current semi-cycles is
used, or full wave, where both semi-cycles are
used.
•Relay
The relay (in French relais, relief) is an electro-
mechanical device that works as a switch con-
trolled by an electric circuit where, through an
electromagnet, a set of contacts is moved and
it allows to open or to close other independent
electric circuits.
•THD
It is the acronym of Total Harmonic Distortion.
The harmonic distortion takes place when the
output signal of a system is not equal to the
signal that goes in. This nonlinearity affects to
the wave shape, because the equipment has
re-injected harmonics that are not in the input
signal. Since they are harmonic, multiples of the
input signal, this distortion is not so dissonant
and it is less easy to detect.