Schneider Electric MasterPact NW25H1 2500A 4-Pole Drawout Air Circuit Breaker – 65kA, Without Trip Unit
The Schneider Electric MasterPact NW25H1, reference 48306, is a 2500A, 4-pole drawout air circuit breaker (ACB) designed for low-voltage power distribution protection. It has an H1 performance level with 65kA breaking capacity at 440V AC and is supplied without a control/trip unit.
Description
The Schneider Electric MasterPact NW25H1 48306 is a high-capacity 2500A air circuit breaker frame intended for demanding low-voltage electrical distribution systems. Its 4-pole configuration provides switching and protection for three-phase systems with neutral, while the drawout mounting arrangement allows the breaker to be withdrawn from its chassis for maintenance and servicing.
The MasterPact NW25H1 provides an H1 65kA short-circuit breaking capacity at 440V AC and maintains 65kA Icu/Ics ratings across the specified 220/415V, 440V, 525V and 690V AC levels. The breaker has a 690V AC rated operational voltage, 1000V insulation voltage and 12kV impulse withstand voltage.
Reference 48306 is supplied without a Micrologic control/trip unit. A suitable Micrologic control unit, matching drawout chassis and rear connections must be selected separately according to the required protection functions and switchboard configuration.
The MasterPact NW25H1 2500A ACB is suitable for applications such as main incomers, bus couplers, sub-main feeders and large LV switchboards in industrial, commercial and infrastructure installations.
| Specification | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Product Range | MasterPact NW |
| Circuit Breaker Name | MasterPact NW25H1 |
| Reference / Catalogue Number | 48306 |
| Product Type | Air Circuit Breaker (ACB) |
| Application | Power Distribution Protection |
| Rated Current (In) | 2500A at 40°C |
| Number of Poles | 4P / 4 Pole |
| Mounting Mode | Drawout |
| Control Unit | Without control unit / trip unit |
| Performance Level | H1 |
| Rated Operational Voltage (Ue) | 690V AC, 50/60Hz |
| Rated Insulation Voltage (Ui) | 1000V AC, 50/60Hz |
| Rated Impulse Withstand Voltage (Uimp) | 12kV |
| Rated Ultimate Breaking Capacity (Icu) | 65kA at 220/415V, 440V, 525V and 690V AC |
| Rated Service Breaking Capacity (Ics) | 65kA at 220/415V, 440V, 525V and 690V AC |
| Short-Time Withstand Current (Icw) | 65kA for 1s / 65kA for 3s |
| Rated Short-Circuit Making Capacity (Icm) | 143kA at 220/415V, 440V, 525V and 690V AC |
| Selectivity Category | Category B |
| Suitability for Isolation | Yes, conforming to EN/IEC 60947-2 |
| Control Type | Push-button / manually operated |
| Sensor Rating | 1250A / 2500A |
| Maximum Breaking Time | 25ms |
| Maximum Closing Response Time | 70ms |
| Power Dissipation | 600W |
| Connection Pitch | 115mm |
| Mounting Support | Backplate / rails |
| Electrical Connection | Front or rear connection |
| Mechanical Durability | 10,000 cycles without maintenance / 20,000 cycles with maintenance |
| Electrical Durability | 5,000 cycles at 440V AC; 2,500 cycles at 690V AC |
| Rated Frequency | 50/60Hz |
| Network Type | AC |
| Ambient Operating Temperature | -25 to +70°C |
| Neutral Position | Left |
| Circuit Breaker Technology | Air Circuit Breaker |
| Mercury Free | Yes |
| Certification | ASTA |
| Standard | IEC 60947-2 |
| Approx. Weight | 49.5kg |
Key Features
- 2500A rated current
- 4-pole / 4P configuration
- MasterPact NW25H1 air circuit breaker
- Drawout/withdrawable design
- 65kA H1 breaking capacity
- 690V AC rated operational voltage
- 65kA short-time withstand current
- 143kA short-circuit making capacity
- 12kV impulse withstand voltage
- 1000V rated insulation voltage
- Category B selectivity
- Suitable for isolation according to IEC 60947-2
- Supplied without Micrologic trip/control unit
- Suitable for large LV power distribution systems
- Front or rear connection options
- Designed for maintenance-friendly drawout switchgear applications
Applications
The Schneider MasterPact NW25H1 2500A ACB is suitable for:
- Main incomer protection
- Bus coupler / bus-tie applications
- Large LV switchboards
- Industrial power distribution
- Commercial electrical distribution
- Infrastructure power systems
- Generator distribution systems
- Large sub-main feeders
- Electrical distribution panels
- High-current low-voltage protection
- Existing MasterPact NW switchboard extensions and maintenance
For drawout installations, the breaker must be matched with the appropriate NW chassis/cradle, Micrologic control unit and rear connection accessories.
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