Automatic electrical control devices for household and similar use

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Elettrodomestico

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With regard to the functional safety of automatic electrical control devices for household and similar purposes, it is generally required their compliance with EN 60730-1.
 
Basically, in the context of functional safety, this standard requires the compliance of the control devices with the following criteria:
  • "fault avoidance";
  • fault tolerance;

ie the standards calls for implementing the measures to avoid faults and capable to guarantee that the system remains safe even in the presence of single or multiple failures (the degradation). To achieve these goals the execution of a thorough analysis of hardware failure modes of the control device is required.

For most of the electronic components, the standard indicates the main failure modes and measures to deal with these failures; However, this is not sufficient, in fact, especially in the case of complex electronics, it is necessary to carry out the fault tree analysis (FTA - fault tree analysis), because this analysis allows to identify with certainty all the possible failure modes of 'electronic control and the possible sequences of combined faults, allowing also to determine which is the likely first fault, (event starter), in a specific sequence.

From this analysis it is therefore possible to identify the hardware architectures and measures to ensure the compliance of the control device with the criteria required by the Standard.

The analyzes and measurements specified by HINTSW - T & T Systems always conform to the requirements listed in the annex H of EN 60730-1 and to those of IEC 61508 (general rule on the safety of electrical / electronic / programmable electronic systems), and, in particular, the fault tree analysis is carried out in accordance with the definitions and requirements of IEC 61025.

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HINTSW - T&T Systems has been operating for over a decade in the field of functional safety concerning the main industrial sectors and public transport.

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