NM8NDC

NM8NDC

The NM8NDC Series Moulded Case Circuit Breaker (MCCB) by CHINT provides superior protection for DC circuits up to 1000V, combining compact design with high reliability. With rated currents up to 800A and breaking capacities up to 100kA, it ensures safe and stable performance for solar, energy storage, and industrial applications. Built to IEC/EN 60947-2 standards, the NM8NDC MCCB features advanced arc-extinguishing technology, multiple installation options, and durable construction for dependable DC power protection.

Product Information

Rated Working Voltage (Ue): DC 1000V
Rated Insulation Voltage (Ui): 1250V
Frame Current (Inm): 250A, 400A, 630A, 800A
Rated Current (In): 63A–800A
Breaking Capacity (Icu/Ics): Up to 100kA (depending on frame size)
Poles: 2P / 3P / 4P
Trip Units: M (magnetic only), TM (thermal-magnetic adjustable), E (electronic)
Mounting Type: Fixed, plug-in, or draw-out
Operational Temperature: −40°C to +70°C
Altitude: ≤2000m (derating above this level)
Mechanical Endurance: ≥15,000 operations
Electrical Endurance: ≥1,500 operations
Standards Compliance: IEC/EN 60947-2, GB 14048.2

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2308-NM8N -MCCB Catalog.pdf

32.24MB

2025-03-27

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2207-NM8N-MCCB-Manual.pdf

16.47MB

2025-03-27

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2204-NM8NDC-125-MCCB-Certificate.pdf

2.25MB

2025-03-27

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2204-NM8NDC-250-MCCB-Certificate.pdf

2.25MB

2025-03-27

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2204-NM8NDC-630-MCCB-Certificate.pdf

2.25MB

2025-03-27

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FAQs

What applications is the NM8NDC MCCB designed for?

The NM8NDC is ideal for DC power systems, including photovoltaic (PV) arrays, battery storage systems, DC distribution, and industrial DC control circuits, where reliable overcurrent and short-circuit protection are critical.

How does it ensure reliable performance in DC systems?

It features high-efficiency arc extinguishing technology and optimized contact structure, allowing fast and safe fault interruption at high voltages up to 1000V DC.

What trip unit options are available?

The NM8NDC offers M (magnetic only) for short-circuit protection, TM (thermal-magnetic) for overload and short-circuit protection, and E (electronic) for adjustable, precise current protection.

Can it operate in harsh environments?

Yes. It operates reliably between −40°C and +70°C, with sealed components and an IP40 protection rating, making it suitable for outdoor PV and industrial environments.

Does it support modular installation?

Absolutely. The NM8NDC supports fixed, plug-in, and draw-out configurations, simplifying maintenance and integration in DC switchboards.