Electromagnetic compatibility - MARECHAL ELECTRIC

Optimum performance for your electrical installations

Choose quality and innovation with MARECHAL^® sockets-outlets and opt for guaranteed peace of mind.

Reduces electromagnetic interference and guarantees optimal operation of your electrical equipment Electromagnetic Compatibility (E.M.C.) is the ability of a device to operate in an electromagnetic environment without causing electromagnetic interference itself.

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Equipment performance guaranteed All the stated characteristics of our equipment in terms of sealing, mechanical strength and corrosion resistance are consistently maintained.

Optimisation of your installations The use of MARECHAL® plug socket-outlets guarantees you unrivalled experience in terms of EMC, thus optimising the overall performance of your installations.

What are the possible effects of electromagnetic interference?

Industrial disturbances

Malfunction of electronic equipment

Impaired operation of equipment

Safety risks

Material damage

Complete shutdown of an industrial manufacturing process

Disruption of wireless communication signals

Errors in transmitted or stored data

MARECHAL^® metal appliances
for C.E.M. environments

MARECHAL ELECTRIC has developed a reliable and simple solution with excellent performance in electromagnetic environments, available for industrial ranges or ranges intended for potentially explosive atmospheres, for high currents up to 1,250 A, and for low currents up to 37 contacts. This solution is particularly suitable for electromagnetic environments using variable speed drives for electric motors. Variable speed drives incorporate power electronic switches (diodes, thyristors, bipolar transistors with insulated grids, etc.) to allow variation of the motor’s power supply frequency, and therefore control its speed.

When switching these switches, harmful electromagnetic pollution is generated, consisting of:

current/voltage harmonics
high-frequency (HF) interference, generally between 2 and 16 kHz

This pollution can lead to operating losses caused by overloads or protection devices being triggered unexpectedly. To reduce this interference, MARECHAL ELECTRIC’s solution is to use equipment with metal enclosures and to combine them with metal accessories (handle, sleeve, wall-mounted box, spacer) with a cable gland fitted with suitable shielding.

Effectiveness of shielding continuity for MARECHAL^® equipment

Validation through rigorous testing

This solution’s performance was measured by the Laboratoire National d’Essais (LNE – France) based on the requirements of the ISO 11452-4 standard. The results according to the frequencies considered are as follows:

0 Hz to 20 kHz (range of disturbances generated by variable speed drives): negligible losses of input signal power
20 kHz to 500,000 kHz: input signal power losses between – 2 dB and -33 dB