Description
Schneider 33478 | Circuit breaker, ComPact NS1250N, 50kA/415VAC, Micrologic 2.0 trip unit, 1250A, fixed, 3 poles 3d
Technical Specifications
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Manufacturer: Schneider Electric
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Product Reference: 33478
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Series: ComPact NS1250N
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Device Type: Molded Case Circuit Breaker (MCCB)
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Rated Current (In): 1250 A
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Number of Poles: 3 poles (3d – three poles, all protected)
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Mounting Type: Fixed
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Breaking Capacity:
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50kA at 415V AC (IEC 60947-2 standard)
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Rated Operational Voltage (Ue): Up to 690V AC
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Rated Insulation Voltage (Ui): 1000V
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Impulse Withstand Voltage (Uimp): 8 kV
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Trip Unit Type: Micrologic 2.0 (electronic, fixed thresholds)
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Protection Functions:
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Long-time (overload) protection
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Short-circuit (instantaneous) protection
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Frequency: 50/60 Hz
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Installation: Panel-mounted
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Connection Type: Suitable for cable or busbar connections
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Standards Compliance: IEC 60947-2
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Operating Temperature Range: -25°C to +70°C
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Endurance:
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Mechanical: 10,000 operations
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Electrical: 2,000 operations at full load
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Key Features
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High Breaking Capacity (50kA)
Provides strong fault protection in medium to large-scale electrical networks, ensuring system safety and continuity. -
Micrologic 2.0 Trip Unit
Electronic trip unit with precise protection for overload and short-circuit conditions. Simple, fixed settings for fast and consistent protection. -
Three-Pole, 3d Configuration
Offers full-phase protection across all three lines, making it suitable for balanced three-phase systems. -
Fixed-Mount Design
Cost-effective and robust solution for systems that do not require withdrawable breakers. -
Reliable and Compact
Designed for space-saving in control panels and switchboards while maintaining full performance. -
Accessory Compatibility
Supports auxiliary contacts, shunt trips, undervoltage releases, and other advanced features for monitoring and control. -
Visible ON/OFF Indicator
Enhances safety by clearly showing the status of the breaker during operation and maintenance.
Applications
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Main Circuit Protection
Serves as the primary protective device in large distribution boards or switchgear assemblies. -
Industrial Installations
Suitable for protection of heavy machinery, motors, and feeders in production facilities. -
Commercial Buildings
Ideal for use in malls, office towers, hospitals, and data centers where power reliability is critical. -
Renewable Energy & Utilities
Used in solar, wind, and hybrid energy systems requiring high-current protection. -
Infrastructure Projects
Perfect for large-scale developments such as airports, railways, and smart grids. -
Critical Power Systems
Delivers reliable protection in mission-critical applications like telecom networks, control centers, and emergency services.
