NTMM81 Series Smart Measurement Switch-Natus (Changzhou) Electric Systems Co., Ltd

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High voltage switch cabinet

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Low voltage switch cabinet

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The NTMM81 Smart Measurement Switch is a new type of low-voltage switchgear integrating high-precision current sensors, measurement units, and protection units. Featuring a primary-secondary separation and modular design concept, the secondary modules support hot-swap functionality for flexible replacement and convenient maintenance. It is suitable for three-phase four-wire distribution networks with a neutral point directly grounded, operating at AC 50Hz, rated current 250A (adjustable from 100A to 250A), rated insulation voltage 1000V, and rated operating voltage 400V.dual-mode communication (HPLC+HRF), high-precision AC .

This switch features multiple IoT sensing functions including sampling, power supply relationship topology identification, meter box management, electricity theft early warning, power outage event reporting, line loss analysis and assessment, power quality monitoring, terminal temperature detection, load identification, and automatic fault diagnosis. It incorporates multiple protection functions including long-delay overload, short-delay short-circuit, instantaneous short-circuit, over/under-voltage, and phase-loss protection, safeguarding both power lines and equipment. Monitoring and detecting load-end conditions reduces grid operation and maintenance costs while providing essential data for future energy efficiency systems.

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