Siemens’ white paper details how to protect control circuits and equipment to ensure safe, reliable power distribution across plants, infrastructure, and buildings. It compares miniature, thermomagnetic, and electronic circuit breakers, as well as SITOP selectivity modules, explaining their roles in preventing overloads, short-circuits, and voltage dips. Miniature breakers safeguard conductors, while circuit breakers for equipment provide precise protection for sensitive 24V DC loads like PLCs and sensors. Selectivity modules isolate faulty feeders within milliseconds, maintaining system uptime. Criteria for device selection include load type, conductor length, diagnostics, and UL/NEC compliance.

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