Analogue instruments - Ulrichmatterag.ch

Analogue instruments
Analogue instruments
In many applications, such as control
and distribution panels, it is important to
control the installation quickly and visually,
with no need to interpret data to detect
the installation's status.
CIRCUTOR offers a solution to these
needs with this range of products. Analogue
indicators are essential to display
an instantaneous electrical value with a
needle that moves through a graduated
scale.
M.1
Definition
The main operation of these instruments
is provided by the type of
measurement system used, either a
ferromagnetic system to measure alternating
current or a magneto-electric
system to measure direct current.
CIRCUTOR offers equipment for both
systems. However, most systems are
generally used to measure alternating
current.
In general, analogue instruments are
used because the interpretation of
electrical parameters is quicker and
more visual. Therefore, in this case the
user simply looks at the position of the
needle and does not have to interpret a
number on a digital display.
FERROMAGNETIC OR MAGNETO-
ELECTRIC
Electric current is directly translated by
a measurement element that moves the
needle. There are two types of measurement
elements
Ferromagnetic (AC)
The ferromagnetic indicator is composed
of a coil that transmits the current
measured, with a fixed iron element
and moving iron element in its centre,
connected to the instrument's axis and
needle. The set moves by the repulsion
effect produced by the magnetic field
between both iron elements and the arc
depends on the current transmitted by
M1-4