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How to choose low-voltage equipment

When selecting LV equipment, consider: rated current, load type (resistive, inductive, capacitive), operating conditions (temperature, humidity, vibration) and enclosure protection rating (IP). For industrial facilities, equipment with enhanced breaking capacity (Icu from 25 kA) is recommended.

Main types

Circuit breakers — overload and short-circuit protection (modular up to 125A, power up to 6300A)
RCBOs/RCDs — residual current protection
Contactors — power circuit control (9A to 800A)
Relays — network parameter monitoring
Fuses — fast-acting protection (blade, cylindrical)

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How to choose low-voltage equipment

Main types