The YCM1-125M 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 80A, with 2 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, 35kA at 400V, and 10kA at 690V. The working short-circuit breaking capacity (Ics) is 22kA. The rated operation voltage (Ue) is now AC400V.
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 | YCM1-125M |
| Poles (P) | 4 |
| Rated Current (In) | 80 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: 50 kA; 400V: 50 kA; 690V: 10 kA |
| Working Short-Circuit Breaking Capacity (Ics) | 50 kA |
| Arcing Distance | 50 mm |
| Electrical Life | 3000 operations |
| Mechanical Life | 20,000 operations |
| Operating Frequency | AC 50 Hz |
| Standards | IEC60947-2 |
| Installation | Vertical or horizontal |
| Overall Size (mm) | W 92 × L 150 × H 86; W1 60 × W2 122 × L1 200 × H1 105 × H2 24 |
| Installation Size (mm) | A 30 × B 129; Φd 4.5 |
| Applications | Power distribution, overload/short-circuit protection, motor protection, residential, industrial, marine |
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