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CM3LE (M3L) Earth Leakage MCCB Molded-Case-Circuit-Breaker 63A-800A
CM3L non-transparent leakage molded case circuit breaker is widely adopted in general industrial and public power distribution occasions. It is extensively applied in factory main incoming lines, workshop distribution systems, commercial complex power rooms, construction site temporary electricity, municipal engineering, water pump stations, mining and chemical supporting facilities.
Complying with IEC 60947-2 international industrial standards, CM3L adapts to 50/60Hz, 400/415V AC power grids, covering full current specifications for heavy-load circuits. Featuring stable residual current detection, sensitive tripping action and strong anti-interference ability, it effectively isolates insulation faults, leakage risks and circuit abnormalities. As a cost-effective mainstream leakage MCCB, it delivers long-term reliable performance for harsh working conditions and large-scale engineering projects.
Key Adventages
- Three-in-one comprehensive protection: Integrates residual current leakage, overload long-delay and short-circuit instantaneous protection to fully secure power distribution circuits and electrical equipment.
- High-sensitivity leakage tripping: Rapid response to leakage faults, effectively preventing electric shock accidents, cable insulation aging and latent electrical fire hazards.
- Mature CM3 industrial base structure: Inherits high breaking capacity, stable mechanical performance and durable service life of CM3 series molded case circuit breakers.
- Adjustable residual current level: Multiple leakage current settings optional to meet different demands for personal protection, equipment safety and fire prevention.
- Industrial non-transparent flame-retardant housing: High-strength heat-resistant and impact-resistant engineering plastic, anti-aging and stable in dusty, humid and high-temperature environments.
- Unified installation and strong compatibility: Standard overall dimension and wiring method, compatible with existing distribution cabinets, easy replacement and on-site assembly.
- Foreign trade & project mature model: Complete certification documents and stable batch supply, ideal for bulk order, complete cabinet matching and overseas engineering bidding.
Main Technical Parameters
CM3L (M3L) Series Earth Leakage MCCB – Detailed Technical Parameters
| Item | CM3L-100 | CM3L-225 | CM3L-400 | CM3L-630 |
|---|---|---|---|---|
| Frame Current Inm (A) | 100 | 225 | 400 | 630 |
| Rated Current In (A) | 10,16,20,32,40,50,63,80,100 | 100,125,160,180,200,225 | 225,250,315,350,400 | 400,500,630 |
| Rated Insulation Voltage Ui (V) | 690 | 800 | 690 | 690 |
| Rated Operating Voltage Ue (V) | 400 | 230/400 | 400 | 400 |
| Rated Impulse Withstand Voltage Uimp (kV) | 6 | 8 | 6 | 6 |
| No. of Poles | 3P+N / 4P | 3P+N / 4P | 3P+N / 4P | 3P+N / 4P |
| Breaking Class | L/M | L/M/H | L/M | L/M |
| Ultimate Breaking Capacity Icu (kA) AC400V | 35/50 | 35/50/65 | 45/65 | 45/65 |
| Service Breaking Capacity Ics (kA) AC400V | 25/30 | 25/30/50 | 22.5/32.5 | 22.5/32.5 |
| Leakage Current (mA) | 30/100/300 | 30/100/300 | 30/100/500 | 100/500 |
| Arc Flash Distance (mm) | ≤50 | ≤50 | ≤100 | ≤100 |
| Operating Cycles / Hour | 120 | 120 | 60 | 60 |
| Mechanical Life With Load | 3000 | 3000 | 1500 | 1500 |
| Mechanical Life No Load | 7000 | 7000 | 6500 | 6500 |
| Tripping Type | Thermal-magnetic + Leakage | Thermal-magnetic + Leakage | Thermal-magnetic + Leakage | Thermal-magnetic + Leakage |
| Protection Class | IP30 | IP30 | IP30 | IP30 |
| Standards | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 |
CM3L (M3L) Series – Core Features
- Integrated earth leakage protection
- Adjustable leakage current (30mA/100mA/300mA/500mA)
- Overload, short circuit and leakage triple protection
- High safety and anti-fire performance
- Stable zero-sequence current detection
- Easy installation and maintenance
CM3L (M3L) – Typical Applications
Hospitals & Medical Facilities
Schools & Public Buildings
Construction Site Power
Commercial Complexes
Residential Power Distribution
High Safety Industrial Sites
CM3L non-transparent leakage molded case circuit breaker is widely adopted in general industrial and public power distribution occasions. It is extensively applied in factory main incoming lines, workshop distribution systems, commercial complex power rooms, construction site temporary electricity, municipal engineering, water pump stations, mining and chemical supporting facilities.
This model is specially suitable for circuits with high requirements of leakage safety supervision and daily power consumption safety management. With balanced industrial performance, stable quality and competitive cost, CM3L has become a mainstream preferred solution for global low-voltage electrical distributors, complete set manufacturers and engineering contractors to upgrade circuit safety protection.
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