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| Feature | UKM32-160 | UKM32-250 | UKM32-630 | UKM32-1250 |
| Frame Rated Current, Ium (A) | 160 | 250 | 630 | 1250 |
| Rated Current, In (A) | 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160 | 40, 50, 63, 80, 100, 125, 160, 200, 250 | 300, 400, 500, 630 | 800, 1000, 1250 |
| No. of Poles | 2*, 3, 4 | 2*, 3, 4 | 2*, 3, 4 | 3, 4 |
| Rated Operational Voltage, Ue (V) | AC 690,
DC 500 |
AC 690,
DC 500 |
AC 690,
DC 500 |
AC 600,
DC 500 |
| Rated Impulse Withstand Voltage, Uimp (kV) | 8 | 8 | 8 | 8 |
| Rated Insulation Voltage, Ui (V) | 750 | 750 | 750 | 750 |
UKM32 Adjustable MCCB 1250A 3 Poles/4 Poles Moulded Case Circuit Breaker
The UKM32 series is a high-performance, modular circuit breaker designed to provide powerful, rapid, and reliable circuit protection.
It incorporates a unique U-shaped contact pre-breaking technique and a gas-flushing principle to achieve exceptional current-limiting and breaking capabilities.
This effectively suppresses short-circuit currents, protecting electrical equipment and power lines.
Featuring a modular design, all breakers within the same frame share a uniform size and support flexible functional expansion, meeting the high demands of modern power systems for safety, reliability, and cost-effectiveness.
Free Quote NowKey Features
High Performance Breaking:
- Pre-Breaking Tech: U-shaped contacts use magnetic forces to separate quickly, limiting short-circuit current and energy.
- Double Break: Two break points increase arc resistance for stronger current-limiting.
- Ultra-Fast Operation: Gas-driven mechanism ensures breaking within 2ms.
- High Rating: Maximum breaking capacity of 150kA, with various options available.
Reliability & Long Life
- Bearing Shaft: Reduces friction for smoother operation and longer life.
- Durable: High mechanical (15,000 cycles) and electrical (5,000 cycles) lifespan lowers costs.
Modular & Flexible
- Same Size: Uniform dimensions for easy installation and replacement.
- Add-Ons: Accessories allow for easy function expansion.
Safety & Savings
- Protects equipment by reducing short-circuit damage.
- Cascading Support: Lowers the cost of downstream devices while maintaining safety.
Applications
- Industrial Sector: Low-voltage distribution cabinets, Motor Control Centers (MCCs), and distribution boards in factories and manufacturing plants.
- Infrastructure: Power distribution systems in commercial buildings, hospitals, data centers, airports, and rail transit systems.
- Energy Sector: Protection for both DC and AC sides in new energy power generation systems such as solar photovoltaic power stations and wind farms.
| Rated Ultimate Short-Circuit Breaking Capacity, Icu | N | H | L | N | H | L | N | H | L | N | |
| AC 50/60Hz (kA) | 220/240V | 85 | 100 | 200 | 100 | 120 | 200 | 100 | 120 | 200 | 85 |
| 380/415V | 50 | 85 | 150 | 50 | 85 | 150 | 65 | 85 | 150 | 50 | |
| 440/460V | 50 | 70 | 130 | 50 | 70 | 130 | 65 | 85 | 130 | 50 | |
| 480/500V | 30 | 50 | 65 | 42 | 65 | 85 | 42 | 65 | 85 | 40 | |
| 660/690V | 5 | 8 | 10 | 10 | 15 | 20 | 10 | 20 | 35 | / | |
| DC (2 poles in series) | 250V | 42 | 65 | 100 | 50 | 85 | 100 | 50 | 85 | 100 | 20 |
| 500V | 42 | 65 | 100 | 50 | 85 | 100 | 50 | 85 | 100 | / | |
| Rated Service Short-Circuit Breaking Capacity, Ics (% of Icu) | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 75% | |
| Rated Short-Circuit Making Capacity, Icm (kA) | N | H | L | N | H | L | N | H | L | N | |
| AC 50/60Hz | 220/240V | 187 | 220 | 440 | 220 | 264 | 440 | 220 | 264 | 440 | 63 |
| 380/415V | 105 | 187 | 330 | 105 | 187 | 330 | 143 | 187 | 330 | 37.5 | |
| 440/460V | 105 | 154 | 286 | 105 | 154 | 286 | 143 | 187 | 286 | 37.5 | |
| 480/500V | 63 | 105 | 143 | 88 | 143 | 187 | 88 | 143 | 187 | 30 | |
| 660/690V | 8 | 14 | 17 | 17 | 30 | 40 | 17 | 40 | 74 | 22.5 | |
| Use Category | A | A | A | A |
| Isolation Function | Yes | Yes | Yes | Yes |
| Implementation of Standards | IEC 60947-2 | IEC 60947-2 | IEC 60947-2 | IEC 60947-2 |
| Trip Unit (Release) | Thermal-Magnetic | Thermal-Magnetic | Thermal-Magnetic | Thermal-Magnetic |
| Release Types | FTU, FMU, MTU* | FTU, FMU, ATU, MTU* | FTU, FMU, ATU, MTU* | |
| Electronic Release | / | LSI, LSI, ETS** | LSI, LSI, ETS** | LSI, LSI, ETM** |
| Connection Type | Fixed, Plug-in | Fixed, Plug-in | Fixed, Plug-in | Fixed |
| Fixed Connection | Pre-wiring board, Rear connection | Pre-wiring board, Rear connection | Pre-wiring board, Rear connection | Pre-wiring board |
| Plug-in Connection | Pre-wiring board, Rear connection | Pre-wiring board, Rear connection | Pre-wiring board, Rear connection | – |
| Mechanical Life (Cycles) | 25,000 | 25,000 | 20,000 | 10,000 |
| Electrical Life at 415V AC (Cycles) | 10,000 | 10,000 | 6,000 | 5,000 |
| Basic Dimensions (mm) W x H x D – | 3:90 x140 x 86 4:120 x140 x 86 |
3:105 x160 x 86 4:140 x160 x 86 |
3:142 x260 x 110 4:188 x260 x110 |
3:327 x199 x 235 4:327 x199 x 235 |
| Weight (kg) – Pre-wiring Board – 3-Pole | 1.5 | 2 | 5.4 | 12 |
| Weight (kg) – Pre-wiring Board – 4-Pole | 1.8 | 2.8 | 7.2 | 15.6 |
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