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the gate signals of field effect transistors with the capacity for
high current and low saturation voltage of the bipolar transistor,
combining an isolated FET gate for input and control and a bipolar
transistor as a single switch in a single device. The IGBT’s excita-
tion circuit is similar to that of the MOSFET, while the conducting
characteristics are similar to those of the BJT.
•
Interface.-
In electronics, telecommunications and hardware, an
interface (electronics) is the port (physical circuit) through which
signals are sent or received from one system or subsystem to
another.
•
kVA.-
A volt-ampere is the unit used for apparent power in elec-
trical current. In DC, it is practically equal to real power but, in AC,
it can differ from this depending on the power factor.
•
LCD.-
Liquid crystal display, a device invented by Jack Janning,
who was an employee of NCR. It is an electrical system for data
presentation formed by 2 transparent conductive layers and a
special crystalline material in the middle (liquid crystal) which
have the ability to orientate light as it passes through.
•
LED.-
Light-emitting diode, a semiconductor device [diode] that
emits light that is almost monochromatic, that is to say, it has
a very narrow spectrum when it is polarised directly and is pen-
etrated by an electric current. The colour, wavelength, depends
on the semiconductor material used in the construction of the
diode, and can vary from ultraviolet, passing through the visible
light spectrum, to infrared, the latter called IRED (infra-red emit-
ting diode).
•
Circuit breaker.-
A circuit breaker is a device capable of inter-
rupting the electrical current of a circuit when it exceeds certain
maximum values.
•
On-line mode.-
A device is said to be on-line when it is con-
nected to a system, is operative, and normally has its power
supply connected.
•
Inverter.-
An inverter is a circuit used to convert DC into AC. The
function of an inverter is to change a DC input voltage to a sym-
metrical AC output voltage, with the magnitude and frequency
desired by the user or designer.
•
Rectifier.-
In electronics, a rectifier is the element or circuit
that converts AC into DC. This is done by using rectifier diodes,
whether solid state semiconductors, vacuum valves or gaseous
valves, such as those containing mercury vapour. Depending on
the characteristics of the AC power that they use, they are classi-
fied as single-phase when they are powered by a mains phase or
three-phase when they are powered by three phases. Depending
on the type of rectification, they can be half wave when only one
of the half cycles of the current is used or full wave when both
half cycles are used.
•
Relay.-
A relay is an electromechanical device that functions as a
switch controlled by an electrical circuit in which, by means of an
electromagnet, a set of one or several contacts is activated to en-
able other independent electrical circuits to be opened or closed.
•
SCR.-
Silicon controlled rectifier, commonly known as a thyristor,
a 4-layer semiconductor device that works as an almost ideal
switch.
•
THD.-
Total harmonic distortion. Harmonic distortion occurs
when the output signal of a system does not equal the signal that
entered it. This lack of linearity affects the waveform because
the device has introduced harmonics that were not in the input
signal. Since they are harmonic, that is to say, multiples of the
input signal, this distortion is not so dissonant and is less easy
to detect.
SLC TWIN PRO2
UNINTERRUPTIBLE POWER SUPPLY (UPS)
USER MANUAL
