SUMEC TOUCH WORLD

A circuit breaker is an essential safety device for any piece of equipment or network through which an electric current flows. Quite simply it will, as the name indicates, break the circuit and stop the current flowing if it detects any dangerous anomalous current, voltage, or temperature levels in the circuit. Generally, in an industrial context, electricity passes through a circuit-breaker box where it is divided into several circuits. Each of these circuits will then have a circuit breaker wired in series with them so that it can act immediately and without any intermediary system if an anomaly is detected. Without a circuit breaker, there can be a risk of fire, fumes, damage to equipment, and electrocution. A circuit breaker therefore performs the same basic function as a fuse, but unlike a fuse, its operation does not involve its destruction and it can subsequently be reset. A circuit breaker may, for instance, operate with the use of stored energy provided by simple mechanical means, such as a spring, or it may exploit the thermal or magnetic effect of the excess current itself to separate its internal electrical connectors. A wide range of circuit breakers are available with attributes varying according to the voltage, installation, external design, location, and switching mechanism that is appropriate for the specific application.

22A hardness tester is a measuring instrument used to assess the stiffness or strength of a material. Hardness testers are used to determine the resistance of a material to deformation by means of a harder tool, most often a diamond cone or steel ball, which penetrates the surface of the material being tested. The hardness tester then measures the penetration depth of the tool and the impression left by the tool on the surface of the sample. Different test methods exist. This guide will present different hardness testers with their advantages and disadvantages.22