The Square D S29407 Undervoltage Trip is a circuit breaker accessory designed for H-, J-, and L-frame molded case circuit breakers (MCCBs). Manufactured by Schneider Electric under the Square D brand, this undervoltage trip module automatically opens the circuit breaker when the control voltage falls below a predetermined level, helping protect electrical systems from unsafe operating conditions caused by voltage loss or instability. Although this model has been discontinued by the manufacturer, it remains a replacement and maintenance component for existing installations.
Voltage and Rating
- Rated Control Voltage: 208–277 Volts AC
- Type: Undervoltage Trip
- Operating Voltage: AC Only
Key Specifications
- Brand: Square D
- Manufacturer: Schneider Electric
- Model Number: S29407
- Product Type: Circuit Breaker Accessory
- Accessory Type: Undervoltage Trip
- Compatibility: H-, J-, and L-Frame Molded Case Circuit Breakers
- Status: Discontinued by Manufacturer
Technical Specifications
- Designed for automatic breaker tripping during undervoltage conditions
- Helps prevent equipment damage and unsafe operation during voltage loss
- Integrates directly into compatible circuit breaker assemblies
- Suitable for industrial and commercial electrical protection systems
Physical Specifications
- Weight: 0.45 kg (0.99 lb)
Product Data
- Manufacturer: Schneider Electric / Square D
- Part Number: S29407
- Category: Circuit Breaker Accessory
- Subcategory: Molded Case Circuit Breaker Undervoltage Trip
Features and Benefits
- Provides automatic protection against low-voltage conditions.
- Prevents unexpected equipment operation after power restoration.
- Enhances electrical system safety and reliability.
- Designed for seamless integration with H-, J-, and L-frame MCCBs.
- Ideal for applications requiring automatic shutdown during power disturbances.
- Compact design minimizes installation space requirements.
Applications
- Industrial Power Distribution Systems
- Commercial Electrical Installations
- Motor Control Centers
- Emergency Shutdown Systems
- Critical Equipment Protection
- Building Power Management Systems
- MCCB Retrofit and Maintenance Projects
Compatibility
- H-Frame Molded Case Circuit Breakers
- J-Frame Molded Case Circuit Breakers
- L-Frame Molded Case Circuit Breakers
Product Summary
- Brand: Square D
- Model: S29407
- Accessory Type: Undervoltage Trip
- Voltage Rating: 208–277V AC
- Compatible Frames: H, J, and L
- Function: Automatic breaker tripping during undervoltage conditions
- Status: Discontinued by Manufacturer
- Weight: 0.45 kg (0.99 lb)
- Type Circuit Breakers
- Vendor Square D
- Brand Square D
Returns are easy
You may return items within 30 days of delivery for a refund.
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