Schneider Electric LV431831 Molded Case Circuit Breaker (MCCB) – NSX250N TMD 200A, 3-Pole, 50kA
Overview
The Schneider Electric LV431831 is a premium-grade Molded Case Circuit Breaker (MCCB) from the Compact NSX series, specifically designed for applications that demand dependable protection and performance. The model NSX250N incorporates a TMD (Thermal-Magnetic) trip unit rated at 200 amps, delivering fast and accurate protection against overloads and short circuits. With a breaking capacity of 50 kA at 415 VAC, this 3-pole MCCB is ideal for a wide range of industrial, commercial, and infrastructure power distribution systems.
Engineered by Schneider Electric, a global leader in energy management and automation, the LV431831 ensures safety, efficiency, and reliability in every installation. Its compact design, superior interruption capacity, and integrated safety features make it an essential solution for critical circuit protection applications.
Key Features and Benefits
- Rated Current: 200 A
- Breaking Capacity: 50 kA at 415 VAC
- Trip Unit Type: Thermal-Magnetic (TMD)
- Poles: 3 (3d configuration)
- Compact NSX Range: Space-saving footprint with powerful performance
- Precision Protection: TMD unit offers dual protection — thermal for overloads, magnetic for short circuits
- Standard Compliance: Conforms to IEC 60947-2 standards
- Easy Installation: Plug-in and fixed type mounting options available
- Robust Build: Designed for industrial environments with high fault levels
- Field Replaceable Accessories: Flexibility for future upgrades and maintenance
- Optimized Arc Control: Minimizes arc flash risks and enhances operator safety
- Low Maintenance: Designed for long operational life with minimal service requirements
Technical Specifications Table
| Specification | Details |
|---|---|
| Product Name | Schneider Molded Case Circuit Breaker |
| Part Number | LV431831 |
| Series | Compact NSX |
| Model | NSX250N |
| Trip Unit | TMD (Thermal-Magnetic) |
| Rated Operational Current (In) | 200 A |
| Number of Poles | 3 |
| Configuration | 3d (Three poles in-line) |
| Rated Breaking Capacity (415 VAC) | 50 kA |
| Rated Insulation Voltage | 750 V |
| Rated Impulse Withstand Voltage | 8 kV |
| Frequency | 50/60 Hz |
| Compliance Standard | IEC 60947-2 |
| Mounting Type | Fixed (with options for plug-in or drawout) |
| Dimensions (H x W x D) | Approx. 161 x 105 x 86 mm |
| Weight | Approx. 2.2 kg |
| Certifications | CE, RoHS |
Applications
The LV431831 MCCB is a versatile circuit protection solution suitable for:
- Industrial Facilities
High-load machinery, heavy motors, and process plants. - Commercial Buildings
Electrical panels, HVAC systems, elevators, and lighting control. - Infrastructure Projects
Power distribution for railway, airports, and metro stations. - Renewable Energy Systems
Solar and wind power installations needing dependable circuit protection. - Data Centers & Server Rooms
Reliable protection for critical IT infrastructure.
Product Advantages
| Feature | Advantage |
|---|---|
| Thermal-Magnetic Trip Unit | Accurate dual-mode protection against overloads and short circuits |
| High Breaking Capacity | Withstands high fault currents, reducing risk of fire or damage |
| Compact Footprint | Saves space in electrical enclosures |
| Field Upgradeable | Accepts add-ons like auxiliary contacts, shunt trip, etc. |
| Global Certification | Meets international safety and quality standards |
| Environmentally Safe | RoHS compliant and recyclable components |
| Simplified Maintenance | Clear markings and tool-less cover removal |
Installation Notes
- Orientation: Can be installed horizontally or vertically without performance loss.
- Wiring: Compatible with copper or aluminum conductors. Use correctly rated lugs.
- Torque Specifications: Follow Schneider’s datasheet for safe tightening torque.
- Clearance: Ensure adequate space around the unit for ventilation and maintenance.
- Testing: Routine trip testing recommended as part of scheduled maintenance.
Compliance and Safety
- Standards: IEC 60947-2 certified
- Dielectric Strength: Withstands high-voltage spikes (8 kV impulse)
- Temperature Range: -25°C to +70°C (operational)
- Environmental Protection: IP20 (when enclosed), suitable for indoor installations
- Material: Flame-retardant casing for improved fire safety
Comparison Table with Similar MCCBs
| Model | Current Rating | Poles | Breaking Capacity @ 415V | Trip Unit | Size Class |
|---|---|---|---|---|---|
| LV431831 | 200 A | 3 | 50 kA | TMD | NSX250N |
| LV431632 | 250 A | 3 | 36 kA | TMD | NSX250F |
| LV432631 | 100 A | 3 | 70 kA | Micrologic | NSX100H |
Frequently Asked Questions (FAQs)
Q1: What is the main difference between the TMD and Micrologic trip units?
A1: The TMD (Thermal-Magnetic Device) trip unit provides fixed thermal and magnetic settings, ideal for general protection needs. Micrologic trip units offer adjustable parameters and advanced metering, used in more complex installations.
Q2: Can the LV431831 MCCB be used with aluminum conductors?
A2: Yes, provided the correct type and size of lugs or terminals are used. Ensure compatibility with the conductor material and follow manufacturer guidelines.
Q3: Does this MCCB support add-ons like undervoltage or shunt trip devices?
A3: Yes, the LV431831 supports field-installable accessories such as undervoltage releases, shunt trips, and auxiliary contacts for extended functionality.
Q4: What maintenance is required for this MCCB?
A4: Regular inspection for dust accumulation, loose connections, and testing of trip functionality. Schneider recommends annual preventive maintenance for optimal safety.
Q5: Is the LV431831 suitable for outdoor use?
A5: Not directly. It must be installed within a weatherproof enclosure if used outdoors. The device itself is intended for indoor or protected environments.
Conclusion
The Schneider Electric LV431831 Molded Case Circuit Breaker is a highly reliable and efficient solution for medium-range power distribution systems. Offering robust protection with its 200 A TMD trip unit, high 50 kA breaking capacity, and durable 3-pole configuration, it’s built to perform under demanding conditions. Backed by Schneider’s global reputation for innovation and quality, the LV431831 is ideal for a wide array of applications — from manufacturing plants to commercial buildings and infrastructure networks.
Choose the LV431831 MCCB for a future-proof, safe, and scalable protection solution for your electrical systems.
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