Schneider C4037A400 MicroLogic Vigi 7.3 E AL Trip Unit

The C4037A400 Schneider is a MicroLogic Vigi 7.3 E AL electronic trip unit designed for advanced protection and monitoring in low-voltage power distribution systems. Specifically engineered for integration with ComPacT NSX400 and NSX630 circuit breakers, this unit supports 3-pole configurations and is rated for 400 A at 40 °C.

It offers comprehensive protection functions, including long-time (L), short-time (S), and instantaneous (I) protection, with adjustable settings to suit various applications. The integrated earth leakage alarm provides early fault detection without tripping, enhancing system reliability. Additionally, the unit features an energy meter with an LCD display, enabling real-time monitoring of energy consumption and power quality. Compliant with IEC 60947-2 standards, it ensures reliable performance in industrial and commercial environments.

Technical Specifications

• Model: C4037A400
• Type: Electronic Trip Unit with Earth Leakage Alarm & Energy Meter
• Brand: Schneider Electric
• Range: ComPacT NSX New Generation

Power & Performance

• Rated Current: 400 A at 40°C
• Poles: 3P (Three Poles)
• Protected Poles: 3D
• Trip Unit Technology: Electronic
• Operational Voltage: 440V AC 50/60Hz
• Trip Unit Protections: L (Long-Time), S (Short-Time), I (Instantaneous)
• Application: Distribution

Protection Functions

• Long-Time Protection (Overload): Adjustable 160A – 400A (9 settings)
• Long-Time Delay: Adjustable
  • 15 to 400s at 1.5 x Ir
  • 0.35 to 11s at 7.2 x Ir
  • 0.5 to 16s at 6 x Ir
• Thermal Memory: 20 minutes before and after tripping
• Short-Time Protection: Adjustable 1.5 to 10 x Ir
• Short-Time Delay: Adjustable
  • 0 to 0.4s (I²t OFF)
  • 0.1 to 0.4s (I²t ON)
• Instantaneous Protection: Adjustable 1.5 to 12 x In
• Earth Leakage Alarm:
  • Provides alarm (no trip) via terminal block
  • Sensitivity Adjustment Range: 0.3A / 0.5A / 1A / 3A / 5A / 10A
  • Time Delay: Adjustable (0 ms / 60 ms / 150 ms / 500 ms / 1 s)
  • Earth Leakage Mode: OFF using IΔn rotary switch
• Zone Selective Interlocking (ZSI): Not Available

Build & Design

• Mounting Mode: Fixed
• Local Signaling:
  • Flashing Green LED – Ready to operate
  • Red LED – Overload above 105% Ir
  • Orange LED – Overload above 90% Ir

C4037A400 Physical Specifications

• Gross Weight: 1.886 kg

Dimensions:

• Height: 17.2 cm
• Width: 21.3 cm
• Depth: 25.0 cm

Additional Features

• Operating Temperature: -25°C to 70°C
• Storage Temperature: -40°C to 85°C
• Standards Compliance: IEC 60947-2, Pollution Degree 3
• Electrical Shock Protection: Class II
• IP Rating: IP40 (IEC 60529)

Environmental Impact

• Carbon Footprint: 183 kg CO₂-eq (Total Life Cycle)
• Recycled Metal Content: 0%

Key Features & Benefits

✅ Earth Leakage Alarm: Built-in detection sends an alarm without tripping, ensuring enhanced system monitoring and safety.

✅ Integrated Energy Meter: LCD display for real-time energy measurement and system optimization.

✅ Comprehensive Protection: Adjustable settings for overload, short-circuit, and earth leakage monitoring.

✅ Compact & Efficient: Perfect for standard and demanding applications on ComPacT NSX400/630 systems.

✅ EcoStruxure Power Ready: Compatible with PowerTag NSX for advanced energy management and connectivity.

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