LMM1L Residual Current MCCB | Earth Leakage Molded Case Circuit Breaker
LMM1L Residual Current MCCB | Earth Leakage Molded Case Circuit Breaker
Leakage moulded case circuit breaker (commonly referred to as leakage MCCB) is a kind of electrical switchgear with plastic shell as the protective carrier, which integrates three core functions of“Leakage protection + overload protection + short circuit protection”. Compared with small residual-current device, it has larger rated current (10A-1600A) , stronger breaking capacity, and can adapt to medium and high power circuit scenarios;
- Model Name: LMM1L
- Rated Current: 63,125,250,400,630,800,1250,1600
- Rated Voltage :230,415,500,690
- Rated Residual Current (IΔn):Adjustable: 100mA / 300mA / 500mA
- Poles:2P,3P,4P
- Rated Insulation Voltage:1000V
- Standard:IEC60947-2
Leakage moulded case circuit breaker (commonly referred to as leakage MCCB) is a kind of electrical switchgear with plastic shell as the protective carrier, which integrates three core functions of“Leakage protection + overload protection + short circuit protection”. Compared with small residual-current device, it has larger rated current (10A-1600A) , stronger breaking capacity, and can adapt to medium and high power circuit scenarios;
- Model Name: LMM1L
- Rated Current: 63,125,250,400,630,800,1250,1600
- Rated Voltage :230,415,500,690
- Rated Residual Current (IΔn):Adjustable: 100mA / 300mA / 500mA
- Poles:2P,3P,4P
- Rated Insulation Voltage:1000V
- Standard:IEC60947-2
1. Product Overview
LVMA LMM1L residual current MCCB is an integrated multi-protection molded case circuit breaker. This leakage MCCB combines overload protection, short-circuit protection and adjustable residual current earth leakage protection in one unit. When electric leakage, overload or short-circuit faults occur, the breaker rapidly trips to cut off power supply, effectively preventing electric shock accidents and leakage-induced fires.
Suitable for three-phase low-voltage AC distribution systems, widely adopted in industrial workshops, commercial complexes, construction sites, shopping malls and municipal power distribution projects.
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM1L |
| Poles | 3P, 4P |
| Rated Operational Voltage (Ue) | AC 400V / 50Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Current (In) | 63-1250A |
| Rated Residual Current (IΔn) | Adjustable: 100mA / 300mA / 500mA |
| Residual Current Trip Time | Adjustable: 0.1s / 0.3s / 0.5s |
| Breaking Capacity (Icu) | 35kA (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 | ≥8,000 operations |
| Electrical Life | ≥1,500 operations at rated load |
3. Core Features
✅ Triple protection: Overload, short-circuit & adjustable earth leakage protection
✅ Adjustable residual operating current to meet different project requirements
✅ AC type leakage detection, stable performance under AC leakage fault
✅ Clear visual ON/OFF trip indicator
✅ Manual test button (T button) for regular leakage function inspection
✅ High breaking capacity, reliable fault interruption
✅ Robust flame-retardant plastic housing, anti-aging
✅ Compliant with international IEC 60947-2 standard
✅ Available in multiple rated current specifications
4. Applications
- 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. Our Advantages
Comprehensive All-in-one Protection
Adjustable Leakage Current
Strict Quality Control
Complete Specification Portfolio
High Safety Performance
Customization & Wholesale Support
Professional Technical Support
FAQ | Frequently Asked Questions
Q1: What protection functions does LMM1L leakage MCCB provide?
Q2: What is the difference between leakage MCCB and ordinary MCCB?
Q3: How to test the leakage function of this MCCB?
Q4: Is this model AC type or A type leakage protection?
Q5: Which pole types are available for LMM1L?
Q6: Can LVMA accept OEM orders for bulk quantity?
1. Product Overview
LVMA LMM1L residual current MCCB is an integrated multi-protection molded case circuit breaker. This leakage MCCB combines overload protection, short-circuit protection and adjustable residual current earth leakage protection in one unit. When electric leakage, overload or short-circuit faults occur, the breaker rapidly trips to cut off power supply, effectively preventing electric shock accidents and leakage-induced fires.
Suitable for three-phase low-voltage AC distribution systems, widely adopted in industrial workshops, commercial complexes, construction sites, shopping malls and municipal power distribution projects.
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM1L |
| Poles | 3P, 4P |
| Rated Operational Voltage (Ue) | AC 400V / 50Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Current (In) | 63-1250A |
| Rated Residual Current (IΔn) | Adjustable: 100mA / 300mA / 500mA |
| Residual Current Trip Time | Adjustable: 0.1s / 0.3s / 0.5s |
| Breaking Capacity (Icu) | 35kA (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 | ≥8,000 operations |
| Electrical Life | ≥1,500 operations at rated load |
3. Core Features
✅ Triple protection: Overload, short-circuit & adjustable earth leakage protection
✅ Adjustable residual operating current to meet different project requirements
✅ AC type leakage detection, stable performance under AC leakage fault
✅ Clear visual ON/OFF trip indicator
✅ Manual test button (T button) for regular leakage function inspection
✅ High breaking capacity, reliable fault interruption
✅ Robust flame-retardant plastic housing, anti-aging
✅ Compliant with international IEC 60947-2 standard
✅ Available in multiple rated current specifications
4. Applications
- 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. Our Advantages
Comprehensive All-in-one Protection
Adjustable Leakage Current
Strict Quality Control
Complete Specification Portfolio
High Safety Performance
Customization & Wholesale Support
Professional Technical Support
FAQ | Frequently Asked Questions
Q1: What protection functions does LMM1L leakage MCCB provide?
Q2: What is the difference between leakage MCCB and ordinary MCCB?
Q3: How to test the leakage function of this MCCB?
Q4: Is this model AC type or A type leakage protection?
Q5: Which pole types are available for LMM1L?
Q6: Can LVMA accept OEM orders for bulk quantity?
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