12.07.2015 Views

Analogue instruments - Circutor

Analogue instruments - Circutor

Analogue instruments - Circutor

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<strong>Analogue</strong> <strong>instruments</strong><strong>Analogue</strong> <strong>instruments</strong>In many applications, such as controland distribution panels, it is important tocontrol the installation quickly and visually,with no need to interpret data to detectthe installation's status.CIRCUTOR offers a solution to theseneeds with this range of products. <strong>Analogue</strong>indicators are essential to displayan instantaneous electrical value with aneedle that moves through a graduatedscale.M.1DefinitionThe main operation of these <strong>instruments</strong>is provided by the type ofmeasurement system used, either aferromagnetic system to measure alternatingcurrent or a magneto-electricsystem to measure direct current.CIRCUTOR offers equipment for bothsystems. However, most systems aregenerally used to measure alternatingcurrent.In general, analogue <strong>instruments</strong> areused because the interpretation ofelectrical parameters is quicker andmore visual. Therefore, in this case theuser simply looks at the position of theneedle and does not have to interpret anumber on a digital display.FERROMAGNETIC OR MAGNETO-ELECTRICElectric current is directly translated bya measurement element that moves theneedle. There are two types of measurementelementsFerromagnetic (AC)The ferromagnetic indicator is composedof a coil that transmits the currentmeasured, with a fixed iron elementand moving iron element in its centre,connected to the instrument's axis andneedle. The set moves by the repulsioneffect produced by the magnetic fieldbetween both iron elements and the arcdepends on the current transmitted byM1-4

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