LMM3L 125-630A 3P/4P ELCB MCCB with Earth Leakage Protection
LMM3L 125-630A 3P/4P ELCB MCCB with Earth Leakage Protection
The LVMA LMM3L ELCB/MCCB is a heavy-duty combined residual current circuit breaker for 400V AC 3-phase+neutral systems. It integrates adjustable earth leakage, overload, and short-circuit protection in one compact unit for enhanced electrical safety.
Product Code:Residual Current Operated Circuit Breaker
Frame Rating:125, 250, 400, 630
Rated Current:Â 16A – 630A
Rated Voltage:AC415/690V
Number of Poles:3P,4P
The LVMA LMM3L ELCB/MCCB is a heavy-duty combined residual current circuit breaker for 400V AC 3-phase+neutral systems. It integrates adjustable earth leakage, overload, and short-circuit protection in one compact unit for enhanced electrical safety.
Product Code:Residual Current Operated Circuit Breaker
Frame Rating:125, 250, 400, 630
Rated Current:Â 16A – 630A
Rated Voltage:AC415/690V
Number of Poles:3P,4P
1. Product Overview
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM3L-630M/3300 |
| Poles | 3P/4P (3-phase + neutral) |
| Rated Operational Voltage (Ue) | AC 400V / 50Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Current (In) | 125-630A |
| Rated Residual Current (IΔn) | Adjustable: 100mA / 300mA / 500mA / 1A |
| Residual Current Trip Time | Adjustable: 0.1s / 0.3s / 0.5s / 1s |
| Breaking Capacity (Icu) | 50kA / 65kA (at 400V) |
| Protection Functions | Residual current (earth leakage), Overload, Short-circuit |
| Trip Type | Combined thermal-magnetic + residual current |
| Mounting Type | Panel mount |
| Enclosure Rating | IP20 (front face) |
| Compliance Standards | IEC 60947-2, IEC 60947-3, GB/T 14048.2 |
| Operating Temperature | -10°C ~ +60°C |
| Mechanical Life | ≥6,000 operations |
| Electrical Life | ≥1,000 operations at rated load |
3. Core Features
✅ All-in-One High-Current Protection: Combines residual current (ELCB), overload, and short-circuit protection in a single 4-pole MCCB, eliminating the need for separate devices.
✅ Adjustable Leakage Settings: Selectable residual current (100mA–1A) and time-delay (0.1s–1s) for custom safety coordination in complex systems.
✅ 3P+N Full Protection: Four-pole design protects all three phases and the neutral line, suitable for balanced and unbalanced three-phase systems.
✅ Test & Reset Functions: Built-in test button verifies residual current functionality, with manual reset after trip events.
✅ Visual Status Indicators: LEDs indicate power status, leakage trip, and fault conditions for quick diagnostics.
✅ Robust Molded Case: Flame-retardant, impact-resistant plastic housing (UL94 V-0) provides excellent durability and electrical insulation.
✅ High Breaking Capacity: Up to 65kA short-circuit withstand at 400V ensures system stability during severe fault conditions.
✅ Large Terminal Connections: Oversized terminals accommodate high-current cables, ensuring secure and low-resistance connections.
4. Applications
- Large commercial building main distribution panels
- Industrial facility three-phase power systems
- Construction site temporary power distribution
- Generator and backup power systems
- Data center and server room electrical safety
- Agricultural and farm power distribution systems
- Solar and wind power plant AC-side circuits
5. Why Choose LVMA LMM3L-630M/3300?
- Comprehensive High-Current Safety: All-in-one protection against leakage, overload, and short-circuit, meeting global electrical safety codes for large-scale systems.
- Flexible Adjustability: Customizable leakage sensitivity and time-delay settings for tailored protection coordination in complex industrial environments.
- Cost & Space Efficient: Replaces multiple separate devices, reducing panel space and installation costs in high-current distribution systems.
- Reliable Performance: Compliant with IEC standards, with rigorous testing to ensure consistent operation in demanding environments.
- Easy Maintenance: Built-in test function and visual indicators simplify periodic safety checks and troubleshooting.
6. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom leakage settings or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM3L-630M/3300 |
| Poles | 3P/4P (3-phase + neutral) |
| Rated Operational Voltage (Ue) | AC 400V / 50Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Current (In) | 125-630A |
| Rated Residual Current (IΔn) | Adjustable: 100mA / 300mA / 500mA / 1A |
| Residual Current Trip Time | Adjustable: 0.1s / 0.3s / 0.5s / 1s |
| Breaking Capacity (Icu) | 50kA / 65kA (at 400V) |
| Protection Functions | Residual current (earth leakage), Overload, Short-circuit |
| Trip Type | Combined thermal-magnetic + residual current |
| Mounting Type | Panel mount |
| Enclosure Rating | IP20 (front face) |
| Compliance Standards | IEC 60947-2, IEC 60947-3, GB/T 14048.2 |
| Operating Temperature | -10°C ~ +60°C |
| Mechanical Life | ≥6,000 operations |
| Electrical Life | ≥1,000 operations at rated load |
3. Core Features
✅ All-in-One High-Current Protection: Combines residual current (ELCB), overload, and short-circuit protection in a single 4-pole MCCB, eliminating the need for separate devices.
✅ Adjustable Leakage Settings: Selectable residual current (100mA–1A) and time-delay (0.1s–1s) for custom safety coordination in complex systems.
✅ 3P+N Full Protection: Four-pole design protects all three phases and the neutral line, suitable for balanced and unbalanced three-phase systems.
✅ Test & Reset Functions: Built-in test button verifies residual current functionality, with manual reset after trip events.
✅ Visual Status Indicators: LEDs indicate power status, leakage trip, and fault conditions for quick diagnostics.
✅ Robust Molded Case: Flame-retardant, impact-resistant plastic housing (UL94 V-0) provides excellent durability and electrical insulation.
✅ High Breaking Capacity: Up to 65kA short-circuit withstand at 400V ensures system stability during severe fault conditions.
✅ Large Terminal Connections: Oversized terminals accommodate high-current cables, ensuring secure and low-resistance connections.
4. Applications
- Large commercial building main distribution panels
- Industrial facility three-phase power systems
- Construction site temporary power distribution
- Generator and backup power systems
- Data center and server room electrical safety
- Agricultural and farm power distribution systems
- Solar and wind power plant AC-side circuits
5. Why Choose LVMA LMM3L-630M/3300?
- Comprehensive High-Current Safety: All-in-one protection against leakage, overload, and short-circuit, meeting global electrical safety codes for large-scale systems.
- Flexible Adjustability: Customizable leakage sensitivity and time-delay settings for tailored protection coordination in complex industrial environments.
- Cost & Space Efficient: Replaces multiple separate devices, reducing panel space and installation costs in high-current distribution systems.
- Reliable Performance: Compliant with IEC standards, with rigorous testing to ensure consistent operation in demanding environments.
- Easy Maintenance: Built-in test function and visual indicators simplify periodic safety checks and troubleshooting.
6. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom leakage settings or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
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