Circuit Protection
MCB selection, RCD types, RCBO vs RCD, surge protection and arc fault detection — technical guides written by panel engineers.
How to Select the Right Circuit Breaker
Type B vs C vs D MCB characteristics explained, breaking capacity (kA) selection, coordination with upstream RCD, and common sizing mistakes for LED circuits and motor loads.
RCD Types Explained: AC, A, F, B
Why Type AC is no longer sufficient, when Type A is the minimum for modern installations, Type F for frequency converter loads, and Type B for EV chargers and PV inverters.
RCBO vs RCD+MCB: Which to Use and When
The practical difference between a combined RCBO and separate RCD + MCB: nuisance tripping, discrimination, DIN rail space, cost and selectivity for commercial distributions.
Surge Protection Devices (SPD) Type 1 / 2 / 3
When SPD Type 1 is mandatory (direct lightning strike protection), Type 2 for panel protection, Type 3 for sensitive equipment. IEC 61643 selection and installation rules.
Arc Fault Detection (AFDD) — EN 62606
What arc faults are, why they cause fires that RCDs don't catch, when AFDD is required by building codes, and how to install them in KNX panels.
Protection devices selected for your project
We specify, supply and certify all protection devices — MCBs, RCDs, SPDs, AFDDs — with full documentation.
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