Knowledge Center

The reference library on low-frequency magnetic fields.

Written by the engineers who run the projects — no marketing, no simplifications that mislead.

Fundamentals·7 min

What is magnetic shielding?

Magnetic shielding redirects or opposes magnetic flux instead of blocking it. Understanding that distinction is the difference between a shield that works and one that wastes money.

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Regulation·8 min

How does ORNI work in Switzerland?

The Swiss ORNI (NISV) is among the strictest non-ionising radiation ordinances in the world. Here is how the 1 µT installation limit value actually applies in practice.

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Engineering·9 min

Magnetic field reduction in substations

In most substations the transformer is not the main source. Busbars and LV cabling usually dominate — and they are also the cheapest to fix.

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Engineering·6 min

Transformer rooms and electromagnetic fields

Integrating a transformer room into an occupied building is routine — and routinely underestimated during design.

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Applications·7 min

Data center magnetic shielding

Power density in modern data centers has outpaced the assumptions behind most building layouts. Magnetic fields are the quiet consequence.

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Applications·8 min

Railway magnetic field mitigation

Railway fields are variable, low frequency and hard to model with static assumptions. Realistic traffic scenarios change the answer entirely.

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Fundamentals·5 min

Difference between electric and magnetic shielding

A grounded metal sheet stops an electric field almost perfectly and a 50 Hz magnetic field almost not at all. The confusion between the two costs projects dearly.

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Fundamentals·6 min

Understanding low-frequency magnetic fields

Microtesla, milligauss, exposure limits, installation limits — a short orientation for engineers and building owners entering the subject.

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