INFOSEC M4T, Руководство пользователя

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DSP - It is the acronym for Digital Signal Processor. A DSP is a system based on a processor or microprocessor
that has instructions in it, hardware and optimized software to develop applications where very fast numerical
operations are needed. It is very useful to process analogical signals in real time: in a system that runs in this
way (real time) samples are received, usually from an analogical/digital converter (ADC).
Power factor - The power factor, p.f., of an alternating current circuit, is defined as the ratio between the
active power, P, and the apparent power, S, or as the cosine of the angles that make the current and voltage
vectors, designating as Cos φ , being the value of that angle.
GND - The term ground, as its name states, refers to the potential of the earth’s surface.
IGBT - The Insulated Gate Bipolar Transistor is a semiconductor used as a controlled switch in powered
electronic circuits. This device has the feature of the gate signal of the effect field transistors with the capacity
of high current and low voltage saturation of the bipolar transistor, combining an isolated FET gate for the input
and a bipolar transistor as the switch in a single device. The triggering circuit of the IGBT is the same as
MOSFET one, while the driving features are like the BJT.
Interface - In electronics, telecommunications and hardware, an interface (electronic) is the port (physical
circuit) through which signals are sent or received from a system or subsystems toward others.
kVA - The volt-ampere is the unit of the apparent power in electrical current. In direct current it is almost equal
to the real power but in alternating current it can differ depending on the power factor.
LCD - Acronym of Liquid Crystal Display, the LCD was invented by Jack Janning, who was an employee of NCR.
It is an electric system of data presentation based on 2 transparent conductor layers and in the middle a special
crystal liquid that have the capacity to direct light passing through.
LED - Acronym of Light Emitting Diode, the LED is a semiconductor (diode) that emits almost monochrome
light with a very narrow spectrum, i.e. when it is direct polarised and it is crossed by an electric current. The
colour, (wave longitude), depends on the semiconductor material used in its construction, being able to vary
from ultraviolet going through the visible spectrum of light to infrared. The latter type is called IRED (Infra Red
Emitting Diode).
Circuit breaker - A circuit breaker or switch, is a device ready to break the electrical current of a circuit when
it exceeds the maximum set values.
On-Line mode - A piece of equipment is on line when it is connected to the system, and it is in operation, and
usually has its power supply turned on.
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 direct current into a symmetrical output voltage of alternating current,
with the magnitude and frequency required by the user or the designer.
Rectifier - In electronics, a rectifier is the component or circuit that allows the alternating current to be
converted into direct current. This is done by rectifier diodes, which can be solid state semiconductors, vacuum
or gassy valves such as the mercury vapour. Depending on the features of the alternating current power supply
used, it is classified as single phase when supplied by a single phase electrical mains, or three phase when
supplied by the three phase power. Depending on the rectification type, a rectifier 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”) is an electromechanical device that works like a switch controlled by an
electric circuit where, through an electromagnet, a set of contacts is moved.