CQM5HU Series Molded Case Circuit Breaker
Product Features
■ Up to AC1140V Suitable for high-voltage AC distribution applications up to AC1140V.
■ Wide Current Range Rated current range from 63A to 630A with 320A and 630A frame sizes.
■Overload & Short-Circuit Protection Provides reliable protection against overload and short-circuit faults.
Isolation Function Designed with an isolation function for circuit safety and maintenance.
■Flexible Operation Supports direct handle operation and optional manual operating mechanism.
Type designation
| No. | Code | Description |
| ① | CQ | Company Code |
| ② | M | Molded Case Circuit Breaker |
| ③ | 5 | Design Code |
| ④ | HU | Derivative Code |
| ⑤ | 320 / 630 | Frame Size |
| ⑥ | M / — | Breaking Capacity Code: M = Standard Type; “—” for 630 |
| ⑦ | 3 | Number of Poles: 3P |
| ⑧ | 2/3 | Release Code: 2 = Magnetic Only; 3 = Thermal-Magnetic |
| ⑨ | □ | Internal Accessory Code: See Accessory Code Reference |
| ⑩ | □ | Operating Mode: Direct Handle / CS1-A Manual Operating Mechanism / CD2 Motor Operating Mechanism |
| ⑪ | □ | Rated Current |
| ⑫ | □ | Rated Voltage: AC800V / AC1140V |
| ⑬ | □ | Accessory Voltage / Specification |
Operating Conditions
| Item | Specificazione |
| Operating Altitude | ≤ 2500 m |
| Ambient Temperature | −35℃ to +70℃ |
| Derating | Required above +40℃ |
| Storage Temperature | −40℃ to +75℃ |
| Relative Humidity | ≤ 50% at +40℃; up to 90% at +20℃ |
| Pollution Degree | 3 |
| Protection Degree | IP20 |
| Installation | Vertical or horizontal |
| Vertical Installation Inclination | ≤ 5° |
Technical Specifications
| Parameter | CQM5HU-320 | CQM5HU-630 |
| Frame Size (A) | 320 | 630 |
| Rated Current In (A) | 63, 80, 100, 125, 140, 160, 180, 200, 225, 250, 280, 315, 320 | 250, 315, 350, 400, 500, 630 |
| Number of Poles | 3P | 3P |
| Rated Operational Voltage Ue (V) | AC800 / AC1140 | AC800 / AC1140 |
| Rated Insulation Voltage Ui (V) | 1250 | 1250 |
| Rated Impulse Withstand Voltage Uimp (kV) | 12 | 12 |
| Breaking Capacity Class | M | — |
| Ics = 100% Icu @ AC800V (kA) | 50 | 65 |
| Ics = 100% Icu @ AC1140V (kA) | 15 | 20 |
| Electrical Operations @ AC800V | 1500 | 1000 |
| Electrical Operations @ AC1140V | 1000 | 800 |
| Mechanical Operations | 15000 | 15000 |
| Ambient Temperature | -35℃ to +70℃* | -3℃ to +70℃* |
| Normal Operating Altitude | ≤ 2500 m | ≤ 2500 m |
| Relative Humidity | ≤50% at +40℃; up to 90% at +20℃ | ≤50% at +40℃; up to 90% at +20℃ |
| Pollution Degree | 3 | 3 |
| Installation Category | III (Main Circuit) / II (Other) | III |
| Degree of Protection | IP20 | IP20 |
| Terminal Screw | M8 | M10 |
| Terminal Tightening Torque | 12 N·m | 35 N·m |
| Mounting Screw | M4 | M4 / M3 |
| Mounting Tightening Torque | 1.5 N·m | 1.5 / 0.8 N·m |
| Dimensions (L × W × H) mm | 264 × 120 × 103 | 275 × 110 × 170 |
| Standards | IEC 60947-2, GB/T 14048.2 | IEC 60947-2, GB/T 14048.2 |
| Certificazione | CCC、CE、TÜV、CB | CCC |
Recommended Conductor Cross-Section
| Rated Current In (A) | 63 | 80 | 100 | 125 | 140/160 | 180/200/225 | 250 | 315 | 320/350 | 400 | 500 | 630 |
| Conductor Cross-Section (mm²) | 16 | 25 | 35 | 50 | 70 | 95 | 120 | 185 | 185 | 240 | 2×240 | 2×240 |
Accessory List
Time-current characteristic curve
Overall and mounting dimensions
CQM5HU-320
CQM5HU-630
