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CM3 MCCB Molded-Case-Circuit-Breaker 63A-800A with transparent case
The CM3 series molded case circuit breakers are mainly applicable to AC 50Hz circuits with a rated working voltage up to 400V and a rated working current up to 800A, CM3 (M3) is a new generation of high-performance molded case circuit breaker, complying with GB 14048.2 and IEC 60947-2 standards. It is used for overload, short circuit and under-voltage protection of power distribution lines and equipment in AC 50Hz systems.
With compact structure, high breaking capacity, stable performance and long service life, CM3 series is widely used in power distribution, industrial control, construction engineering, data centers and other fields.
CM3 (M3) Series Molded Case Circuit Breaker – Overview
| Model | Frame Current | Voltage | Application |
|---|---|---|---|
| CM3-63 | 63A | AC 400V | Light distribution, small equipment |
| CM3-100 | 100A | AC 400V | Workshop, small building |
| CM3-225 | 225A | AC 400V | Commercial power, small industry |
| CM3-400 | 400A | AC 400V | Industrial distribution |
| CM3-630 | 630A | AC 400V | Heavy equipment, main line |
| CM3-800 | 800A | AC 400V | Large power distribution |
Main Technical Parameters
CM3 (M3) Series MCCB – Detailed Technical Parameters
| Item | CM3-63 | CM3-100 | CM3-225 | CM3-400 | CM3-630 | CM3-800 |
|---|---|---|---|---|---|---|
| Frame Current Inm (A) | 63 | 100 | 225 | 400 | 630 | 800 |
| Rated Current In (A) | (6),10,16,20,25,32,40,50,63 | 10,16,20,32,40,50,63,80,100 | 100,125,160,180,200,225 | 225,250,315,350,400 | 400,500,630 | 630,700,800 |
| Rated Insulation Voltage Ui (V) | 500 | 690 | 800 | 690 | 690 | 690 |
| Rated Operating Voltage Ue (V) | 400 | 400 | 230/400 | 400 | 400 | 400 |
| Rated Impulse Withstand Voltage Uimp (kV) | 6 | 6 | 8 | 6 | 6 | 6 |
| No. of Poles | 3/4 | 3/4 | 2/3/4 | 3/4 | 3/4 | 3/4 |
| Breaking Class | L/M | L/M | L/M/H | L/M | L/M | L/M |
| Ultimate Breaking Capacity Icu (kA) AC400V | 10/15/35 | 35/50 | 35/50/65 | 45/65 | 45/65 | 50/65 |
| Service Breaking Capacity Ics (kA) AC400V | 5/10/25 | 25/30 | 25/30/50 | 22.5/32.5 | 22.5/32.5 | 25/32.5 |
| Arc Flash Distance (mm) | ≤50 | ≤50 | ≤50 | ≤100 | ≤100 | ≤100 |
| Operating Cycles / Hour | 120 | 120 | 120 | 60 | 60 | 20 |
| Mechanical Life With Load | 4000 | 3000 | 3000 | 1500 | 1500 | 1000 |
| Mechanical Life No Load | 6000 | 7000 | 7000 | 6500 | 6500 | 4000 |
| Tripping Type | Thermal-magnetic | Thermal-magnetic | Thermal-magnetic | Thermal-magnetic | Thermal-magnetic | Thermal-magnetic |
| Protection Class | IP30 | IP30 | IP30 | IP30 | IP30 | IP30 |
| Standards | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 | GB14048.2, IEC60947-2 |
CM3 (M3) Series – Core Features
- High breaking capacity up to 70kA
- Compact and reliable structure
- Thermal-magnetic tripping for accurate protection
- 3P and 4P for wide application
- Fixed and plug-in installation available
- Flame retardant shell, high safety
- Long mechanical and electrical life
CM3 (M3) Series – Typical Applications
Industrial Power Distribution
Commercial Building Power
Motor & Pump Protection
Construction Engineering
Data Center Auxiliary Power
Infrastructure Projects