IEC 60204-1:2016 Misure riduzione EMC (Annex H)

La nuova norma IEC 60204-1:2016 (Ed. 6.0) aggiunge un allegato (H) relativo a suggerimenti per migliorare l'immunità elettromagnetica e ridurre l'emissione di disturbi elettromagnetici inerenti gli equipaggiamenti elettrici.

Annex H provides recommendations to improve electromagnetic immunity and reduce emission of electromagnetic disturbances.

For EMC purposes, electrical equipment for machinery is deemed to be either apparatus or fixed installations. Where electrical safety and electromagnetic compatibility result in different requirements, electrical safety always has the higher priority.

Electromagnetic Interference (EMI) can disturb or damage process monitoring, control and automation systems. Currents due to lightning, switching operations, short-circuits and other electromagnetic phenomena can cause overvoltages and electromagnetic interference. These effects can occur for example:

- where large conductive loops exist,
- where different electrical wiring systems are installed in common routes, e.g. power supply, communication, control or signal cables.

Cables carrying large currents with a high rate of change of current (di/dt) can induce overvoltages in other cables, which can influence or damage the connected electrical equipment.

segue

H.1 DEFINITIONS
H.1.1 Apparatus
H.1.2 Fixed installation
H.2 GENERAL
H.3 MITIGATION OF ELECTROMAGNETIC INTERFERENCE (EMI)
H.3.1 General
H.3.2 Measures to reduce EMI
H.4 Separation and segregation of cables
H.5 POWER SUPPLY OF A MACHINE BY PARALLEL SOURCES
H.6 SUPPLY IMPEDANCE WHERE A POWER DRIVE SYSTEM (PDS) IS USED

IEC 60204-1:2016 
Safety of machinery 
Electrical equipment of machines 
Part 1: General requirements

Elaborato Certifico Srl 2017


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