Schneider C1042G040 MicroLogic 2.2 G Electronic Trip Unit

The C1042G040 Schneider is a MicroLogic 2.2 G electronic trip unit designed for generator protection in low-voltage power systems. Built for use with ComPacT NSX100, NSX160, and NSX250 circuit breakers, it supports 4-pole configurations and is rated for 40 A at 40 °C.

It offers adjustable long-time and short-time protection, along with fixed instantaneous protection, making it ideal for generator and standby power installations. Equipped with LED indicators and compliant with IEC 60947-2 standards, it ensures consistent and safe operation in industrial and commercial environments.

Technical Specifications

• Model: C1042G040
• Type: MicroLogic 2.2 G Electronic Trip Unit
• Brand: Schneider Electric
• Range: ComPacT NSX New Generation

Power & Performance

• Rated Current: 40 A at 40°C
• Poles: 4P (Four Poles)
• Protected Poles: 3D + N/2, 4D, or 3D (Selectable Neutral Protection)
• Trip Unit Technology: Electronic
• Application: Generator Protection
• Protection Functions:
  • L: Long-time overload protection (adjustable)
  • S: Short-time short-circuit protection with fixed delay (adjustable)
  • I: Instantaneous short-circuit protection (fixed)
• Rated Operational Voltage (Ue): 690V AC 50/60Hz
• Network Type: AC
• Network Frequency: 50/60 Hz

Advanced Protection Features

• Long-time Protection Range (Ir): 18…40 A (9 settings adjustable)
• Long-time Protection Delay (tr): Fixed
  • 15 s at 1.5 x Ir
  • 0.35 s at 7.2 x Ir
  • 0.5 s at 6 x Ir
• Neutral Protection Settings:
  • 0.5 x Ir (3D + N/2)
  • 1 x Ir (4D)
  • No protection (3D)
• Short-time Protection Range (Isd): 1.5…9 x Ir (adjustable)
• Short-time Delay (tsd): Fixed
• Instantaneous Protection (Ii): Fixed at 600 A
• Thermal Memory: 20 minutes before and after tripping

User Interface & Local Signaling

• Ready to Operate: Flashing Green LED
• Overload Indications:
  • Orange LED at 90% Ir
  • Red LED at 105% Ir

C1042G040 Physical Specifications

• Gross Weight: 576 g

Dimensions:

• Height: 6.6 cm
• Width: 9.7 cm
• Length: 15.0 cm

Environmental Specifications

• Standards: EN/IEC 60947-2
• Shock Protection Class: Class II
• Pollution Degree: 3 (IEC 60947-1)
• IP Degree of Protection: IP40 (IEC 60529)
• Ambient Temperature for Operation: -25°C to +70°C
• Ambient Temperature for Storage: -50°C to +85°C
• Carbon Footprint: 17 kg CO₂-eq (Total Life Cycle)
• Recycled Metal Content: 0%

Key Features & Benefits

✅ 4-Pole Generator Protection: Advanced trip unit supporting selectable neutral protection modes.

✅ Reliable Overload Indication: Multi-stage LED alerts provide real-time system status.

✅ Compact & Robust Design: Perfectly integrates into ComPacT NSX100, NSX160, and NSX250 circuit breakers.

✅ Thermal Memory: Ensures accurate protection during transient conditions by preventing nuisance tripping.

✅ EcoStruxure Ready: Compatible with PowerTag NSX for energy monitoring and integration into EcoStruxure Power architecture.

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