MCCB 3P 35kA

CHINT NM8N-400HVS – High-Voltage MCCB for PV & Industrial Systems

The NM8N-400HVS series is designed for high-voltage AC distribution systems up to approximately 1150 V. With a robust breaker body and thermomagnetic trip unit, this moulded-case circuit breaker is engineered for demanding applications such as solar combiner boxes, inverter outputs and large industrial DC/AC systems. The 400 frame size offers a compact yet powerful solution for protection and isolation in modern energy installations.

Key Features

• High-voltage rated design (up to AC 1000-1150 V and insulation voltage up to 1250 V) for advanced power systems. :contentReference[oaicite:1]{index=1}
• High breaking capacity (up to 50 kA on AC800 V) suitable for heavy fault currents and system robustness. :contentReference[oaicite:2]{index=2}
• Thermomagnetic (TM) release for combined overload and short-circuit protection in one unit.
• Compact frame for 400 A class systems, enabling efficient DIN-rail or panel mounting in tight installations.
• Designed for harsh environments: wide ambient temperature range, arc-extinguishing system and installation versatility. :contentReference[oaicite:3]{index=3}

Typical Applications

• Solar PV systems – especially AC combiner boxes and inverter outputs requiring high-voltage DC protection.
• Battery-storage and hybrid energy installations where higher voltage levels and switching reliability are required.
• Industrial power distribution boards operating at elevated voltages with load protection and isolation needs.
• Any system requiring a reliable 400-frame breaker with high breaking capacity and high-voltage rating.

Installation Notes

• Install on a suitable DIN rail or in a panel cut-out that accommodates the 400-frame dimensions and safe clearances.
• Ensure wiring and bus-bar connections are correctly sized for elevated voltage and designed fault currents.
• Ensure the breaker selection fits the upstream and downstream protection strategy and meets applicable SANS/IEC standards.
• Confirm ambient temperature and altitude derating when installed above 2000 m. :contentReference[oaicite:4]{index=4}

The NM8N-400HVS series provides a high-performance, high-voltage rated solution for protection and switching in large-scale solar, storage and industrial systems where reliability and safety matter.