The YCM1-630M MCCB adopts advanced international design and manufacturing technology, offering high breaking capacity, short arcing distance, and anti-vibration performance. It is widely applied in land-based and marine electrical systems for AC 50Hz power distribution networks.
This breaker is rated at 500A, with 4 poles, a rated insulation voltage of 800V, and a rated impulse withstand voltage of 8000V (8kV). It provides a limit short-circuit breaking capacity (Icu) of 50kA at 230V, 65kA at 400V, and 30kA at 690V (class M). The working short-circuit breaking capacity (Ics) is 50kA at 230V, 50kA at 400V, and 15kA at 690V. The rated operation voltage (Ue) is AC400/690V..
It ensures protection against overload, short circuit, undervoltage, and insulation faults, while also safeguarding motors during infrequent starts.
The breaker can be installed vertically or horizontally and complies with IEC60947-2 standards.
Operating conditions include ambient temperatures from -5°C to +40°C (average ≤35°C), altitude up to 2000m, pollution grade 3, and relative humidity up to 50% at +40°C (allowing up to 90% at +20°C with special measures against dew).
TECHNICAL DETAILS:
| Specification | Details |
| Type/Model | YCM1-630M |
| Poles (P) | 4 |
| Rated Current (In) | 500 A |
| Rated Insulation Voltage (Ui) | 800 V |
| Rated Impulse Withstand Voltage (Uimp) | 8000 V (8 kV) |
| Rated Operation Voltage (Ue) | AC400 V |
| Limit Short-Circuit Breaking Capacity (Icu) | 230V: 75 kA; 400V: 65 kA; 690V: 20 kA |
| Working Short-Circuit Breaking Capacity (Ics) | 230V: 50 kA, 400V: 42.5 kA, 690V: 10 kA |
| Arcing Distance | 100 mm |
| Electrical Life | 2000 operations |
| Mechanical Life | 10,000 operations |
| Operating Frequency | AC 50 Hz |
| Standards | IEC60947-2 |
| Installation | Vertical or horizontal |
| Overall Size (mm) | W 182 × L 271 × H 112; W1 116 × W2 240 × L1 370 × H1 165 × H2 42 |
| Installation Size (mm) | A 58 × B 200; Φd 7 |
| Applications | Power distribution, overload/short-circuit protection, motor protection, residential, industrial, marine |
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