Technical articles from the field
From switchgear selection to panel heat load, drive savings to machine safety — we collect the answers to the questions we meet while quoting and commissioning.
Energy efficiency18 August 20266 min read
I have a correction panel but still pay a reactive penalty
Fitting capacitors is not enough on its own. Four common reasons the penalty persists, and how to tell them apart.
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Enclosures11 August 2026 · 5 min read
Choosing an enclosure: IP rating, size and layout
Enclosure size is not the sum of the devices. Protection class, mounting depth, cable entry and room to grow are decided together.
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Drives and automation4 August 2026 · 6 min read
Star-delta, soft starter or drive?
Three starting methods with different costs, footprints and mechanical effects. Which one fits which application?
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Switchgear28 July 2026 · 6 min read
Motor protection switch or contactor plus thermal relay?
Both protect the motor, but they behave differently in cost, space and maintenance. Which one fits which case, with examples from the field.
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14 July 2026 · 5 min read
Choosing an RCD: 30 mA or 300 mA?
Threshold, type letter and discrimination. The wrong choice either weakens personal safety or trips the line constantly.
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Enclosures30 June 2026 · 6 min read
Panel heat load: fan, cooling unit, or neither?
Most drives that trip in summer are not faulty — the heat load was never calculated. A simple calculation points to the right solution.
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Drives and automation16 June 2026 · 7 min read
Energy savings with drives: how much, and where?
The cubic law produces dramatic results on pumps and fans, but not on conveyors. Knowing the difference sends the investment to the right place.
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Cable and connection29 May 2026 · 6 min read
Cable sizing: current alone is not enough — three criteria matter
Current capacity, voltage drop and short-circuit withstand. Skip one and the calculation is right on paper but wrong on site.
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Machine safety12 May 2026 · 6 min read
Emergency stop architecture: safety relay or safety PLC?
Safety is not a product but a chain. The right component follows from the required performance level and the number of functions.
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24 April 2026 · 5 min read
Contactor selection: AC-1 or AC-3, and which coil voltage?
The two different current ratings in the catalogue cause confusion. Get the utilisation category, switching frequency and coil voltage wrong and the contactor dies early.
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