Electromagnetic compatibility zone

An electromagnetic field is a field of force associated with electric charge in motion, which has both electric and magnetic components and contains electromagnetic energy.

Electromagnetic interference is disturbance that affects an electrical system due to magnetic and electric fields, electromagnetic induction or electromagnetic radiation emitted from an external source.

Electromagnetic compatibility zones are bounded areas in which specific levels of electromagnetic energy exist. Some electromagnetic compatibility zones contain higher levels of electromagnetic energy than others. In the railway environment, the area containing most energy in these electromagnetic compatibility zones exists on the trackside.

Ref The HS2 London-West Midlands Environmental Statement, published by the Department for Transport in November 2013.

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