Schneider Electric MasterPact NW16H1 1600A 3-Pole Drawout ACB – 65kA, Without Trip Unit
The Schneider Electric MasterPact NW16H1 48273 is a 1600A, 3-pole drawout air circuit breaker (ACB) for low-voltage power distribution protection. It features an H1 performance level with 65kA breaking capacity at 440V AC, a 690V AC rated operational voltage, and is supplied without a Micrologic trip/control unit.
Description
The Schneider Electric MasterPact NW16H1 is a high-current air circuit breaker frame designed for demanding low-voltage electrical distribution systems. With a 1600A rated current, 3-pole configuration, and drawout mounting, it is suitable for main incomers, sub-main feeders, bus couplers and other critical power distribution applications.
The NW16H1 48273 provides an H1 65kA short-circuit breaking capacity at 440V AC, with both Icu and Ics rated at 65kA across the specified voltage levels up to 690V AC. Its 12kV impulse withstand voltage and 1000V insulation voltage support its use in demanding LV switchboard environments.
This version is supplied without a control/trip unit. The appropriate Micrologic control unit must be selected separately according to the required protection and metering functions. The drawout breaker also requires a compatible MasterPact NW chassis/cradle for a complete withdrawable installation.
| Specification | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Product Range | MasterPact NW |
| Circuit Breaker Name | MasterPact NW16H1 |
| Reference / Catalogue Number | 48273 |
| Updated Reference | LV948273 |
| Product Type | Air Circuit Breaker (ACB) / Basic Frame |
| Application | Power Distribution Protection |
| Rated Current (In) | 1600A at 40°C |
| Number of Poles | 3P / 3 Pole |
| Mounting Mode | Drawout / Withdrawable |
| Control Unit | Without Control Unit / Trip Unit |
| Performance Level | H1 – 65kA at 440V AC |
| 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; 36kA for 3s |
| Short-Circuit Making Capacity (Icm) | 143kA at 220/415V, 440V, 525V and 690V AC |
| Selectivity Category | Category B |
| Suitability for Isolation | Yes, according to EN/IEC 60947-2 |
| Network Type | AC |
| Rated Frequency | 50/60Hz |
| Control Type | Push-button / manually operated |
| Sensor Rating | 800A / 1600A |
| Circuit Breaker CT Rating | 1600A |
| Power Dissipation | 390W |
| Maximum Breaking Time | 25ms |
| Closing Response Time | <70ms |
| Connection Pitch | 115mm |
| Mechanical Durability | 12,500 cycles without maintenance; 25,000 cycles with maintenance |
| Electrical Durability | Up to 10,000 cycles depending on operating voltage/application |
| Mounting Support | Backplate |
| Protection Type | Without protection / requires separate control unit |
| Ambient Operating Temperature | -25°C to +70°C |
| Standard | IEC 60947-2 |
| Certification | ASTA |
| Mercury Free | Yes |
| RoHS | Compliant / applicable exemption information |
| Approx. Weight | 47.035kg |
Key Features
- 1600A rated current
- 3-pole / 3P configuration
- MasterPact NW16H1 air circuit breaker
- Drawout / withdrawable design
- 65kA H1 breaking capacity
- 65kA Icu and Ics at 440V AC
- 690V AC rated operational voltage
- 12kV impulse withstand voltage
- 1000V rated insulation voltage
- 65kA short-time withstand current for 1 second
- 143kA short-circuit making capacity
- Category B selectivity
- Suitable for isolation according to IEC 60947-2
- Supplied without Micrologic trip/control unit
- Designed for high-current LV power distribution
- Suitable for main incomer, feeder and bus-coupler applications
- Drawout construction simplifies breaker withdrawal for maintenance
Applications
The Schneider Electric MasterPact NW16H1 1600A ACB is suitable for:
- Main incomer protection
- Sub-main feeder protection
- Bus coupler / bus-tie applications
- Industrial LV switchboards
- Commercial building power distribution
- Data-centre electrical distribution
- Industrial plants
- Infrastructure power systems
- LV substations
- Generator distribution systems
- High-current power distribution panels
- Critical electrical installations requiring drawout ACBs
The drawout design allows the breaker to be withdrawn from its chassis for maintenance or replacement while the associated switchboard installation remains configured for withdrawable operation.
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