Square D S29388 Shunt Trip – 380–480V AC for PowerPact H, J & L Frame Circuit Breakers

The Square D S29388 Shunt Trip is a circuit breaker accessory designed for PowerPact H-, J-, and L-frame molded case circuit breakers (MCCBs). Manufactured by Schneider Electric under the Square D brand, this shunt trip enables remote electrical tripping of the circuit breaker when an external control voltage is applied. It is commonly used in emergency shutdown systems, fire alarm interfaces, industrial automation, and safety interlock applications where remote circuit interruption is required.

Voltage and Rating

• Rated Control Voltage: 380–480 V AC
• Type: Shunt Trip

Key Specifications

• Brand: Square D
• Manufacturer: Schneider Electric
• Model Number: S29388
• Product Type: Circuit Breaker Accessory
• Accessory Type: Shunt Trip
• Compatible Circuit Breaker Types:
  • H-Frame MCCBs
  • J-Frame MCCBs
  • L-Frame MCCBs

Technical Specifications

• Function: Remote electrical tripping of compatible circuit breakers
• Wire Size Range: AWG 18 to AWG 14
• Terminal Tightening Torque: 12.39 lb-in (1.4 N·m)
• Designed for integration with PowerPact molded case circuit breakers
• Supports emergency shutdown and remote control functions

Certifications and Standards

• CSA Certified

Features and Benefits

• Provides reliable remote breaker tripping capability.
• Allows integration with emergency stop and fire protection systems.
• Enhances personnel and equipment safety.
• Compact design enables easy installation within compatible breaker assemblies.
• Supports industrial automation and building management systems.
• Manufactured to Square D quality and performance standards.

Applications

• Industrial Power Distribution Systems
• Commercial Electrical Installations
• Emergency Shutdown Systems
• Fire Alarm Interface Systems
• Building Automation Systems
• Motor Control Centers
• Safety Interlocking Systems
• PowerPact MCCB Assemblies

Product Summary

• Brand: Square D
• Model: S29388
• Accessory Type: Shunt Trip
• Rated Voltage: 380–480V AC
• Compatible Frames: H, J, and L
• Wire Size Range: 14–18 AWG
• Tightening Torque: 12.39 lb-in (1.4 N·m)
• Certification: CSA Certified
• Function: Remote electrical tripping for molded case circuit breakers and safety control applications.