NLM1L-400L-4P 400A 4P Molded Case Leakage Circuit Breaker (MCCB)

A next-generation power-protection solution engineered for modern electrical systems.

1. Comprehensive Protection — All in One

The NLM1L-400L-4P MCCB integrates
✔ Overload protection
✔ Short-circuit protection
✔ Earth leakage protection (RCD/RCBO function)
✔ 4-pole full-phase isolation

This makes it an ideal safety device for industrial plants, commercial buildings, power distribution panels and generator systems.

⚡ 2. High Breaking Capacity & Industrial-Grade Reliability

Designed for heavy-duty applications, it offers:
Icu/Ics high interrupting capacity
️ Wide operating temperature range
Stable performance under continuous load

Its robust molded-case structure ensures long life even in harsh electrical environments.

️ 3. Adjustable Leakage Sensitivity (Flexible Settings)

To meet global installation standards, the breaker features:

• Adjustable leakage current (IΔn)

• Adjustable time delay

• Real-time trip indication

• Built-in TEST function for safety inspection

This allows engineers to fine-tune protection for motors, transformers, HVAC systems, and lighting circuits.

4. Energy Safety Meets International Standards

Certified according to major IEC/GB standards, ensuring:
Global compatibility
High-level personnel and equipment safety
⚡ Stable operation for 50/60Hz systems

Perfect for overseas markets including the Middle East, Europe, Southeast Asia and Africa.

5. Designed for Easy Installation & Maintenance

The NLM1L-400L-4P features:
️ Front-panel terminals
Clear indicator lights
Manual test button
Compact installation size

Engineered for panel builders, switchgear manufacturers, and electrical contractors.

6. Why Overseas Customers Choose This Model

• Strong leakage + overload + short-circuit protection

• Reliable operation for large industrial loads

• Fully adjustable protection curve

• High quality at competitive pricing

• Ideal for OEM/ODM markets

This breaker is especially popular in:
Industrial factories
Commercial buildings
⚙️ Machinery & equipment control
Power distribution cabinets

The NLM1L-400L-4P Molded Case Leakage Circuit Breaker is a premium 400A 4-pole MCCB integrating residual-current protection for reliable safety in modern power distribution systems. Engineered with adjustable leakage sensitivity, high interrupting capacity and durable molded-case construction, it protects against overloads, short circuits, earth faults, and insulation faults. Suitable for industrial, commercial and generator applications, this MCCB ensures stable and safe operation even under demanding electrical conditions. Ideal for panel builders, distributors and OEM partners worldwide.