LGF36400U31X - 400 Amp Circuit Breaker

LGF36400U31X - 400 Amp Circuit Breaker

When you're matching a 400A circuit breaker, the catalog number tells you far more than amperage alone. The LGF36400U31X is a 400A, 3-pole PowerPacT L-frame molded case circuit breaker designed for power distribution applications. It operates at up to 600VAC, 50/60 Hz, and uses a MicroLogic 3.3 electronic trip unit with LI long-time and instantaneous protection. Its UL 489 interrupting ratings are 65 kA at 240VAC, 35 kA at 480VAC, and 18 kA at 600VAC, along with 20 kA at 250VDC and 20 kA at 500VDC. The breaker has an 80% continuous-current rating. That's the electrical side of the match.

Key Features and Benefits

• 400A, 3-pole molded case circuit breaker for compatible power distribution applications
• PowerPacT L-frame construction provides a specific frame reference when matching existing electrical equipment
• MicroLogic 3.3 electronic trip unit with long-time and instantaneous (LI) protection
• 80% continuous-current rating
• Maximum rated operational voltage of 600VAC at 50/60 Hz
• Unit-mount busbar configuration with busbar connections on both line and load sides
• Toggle control for straightforward breaker operation
• Local LED indication for ready status, current-level alarms, and trip status
• Suitable for isolation under IEC 60947-2

Technical Specifications

• Catalog Number: LGF36400U31X
  
• Product Type: Molded Case Circuit Breaker
  
• Range: PowerPacT
  
• Product Name: PowerPacT L
  
• Frame: L-Frame
  
• Device Application: Distribution
  
• Rated Current: 400A
  
• Number of Poles: 3
  
• Continuous-Current Rating: 80%
  
• Maximum Rated Operational Voltage: 600VAC
  
• Network Frequency: 50/60 Hz
  
• Trip Unit: MicroLogic 3.3
  
• Trip Unit Technology: Electronic, Standard
  
• Protection Functions: LI — Long-Time and Instantaneous
  
• Long-Time Pickup Adjustment: 0.25–1 x In
  
• Control Type: Toggle
  
• Breaking Capacity Code: G
  
• Interrupting Rating at 240VAC: 65 kA
  
• Interrupting Rating at 480VAC: 35 kA
  
• Interrupting Rating at 600VAC: 18 kA
  
• Interrupting Rating at 250VDC: 20 kA
  
• Interrupting Rating at 500VDC: 20 kA
  
• Rated Insulation Voltage: 750V
  
• Rated Impulse Withstand Voltage: 8 kV
  
• Mounting Mode: Unit Mount
  
• Mounting Support: Busbar
  
• Line-Side Connection: Busbar
  
• Load-Side Connection: Busbar
  
• Terminal Identifier: AL600LS52K3
  
• Conductor Range: 2 x 2/0 AWG through 500 kcmil aluminum/copper
  
• Dimensions: 5.5"W x 13.4"H x 4.3"D
  
• Net Weight: 13.7 lb
  
• Front Cover Protection: IP40
  
• Utilization Category: Category A
  
• Circuit Breaker Application: HACR Rated
  
• Country of Origin: Mexico
  
• GTIN: 785901521785
  

Material Compliance and Certifications

Manufacturer documentation identifies the LGF36400U31X with standards and certifications including UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2. The manufacturer also identifies the product as UL 489 Listed, along with additional certifications and conformity markings applicable to the PowerPacT L-frame product.

Where It Works Best

The LGF36400U31X 400A 3-pole circuit breaker is intended for compatible power distribution equipment that calls for its specific PowerPacT L-frame, busbar-mounted configuration. Manufacturer information also identifies this breaker family for applications that can include use as a main panel disconnect for a control panel, where the equipment design and applicable requirements call for that arrangement.

Mounting can be the deciding detail. The LGF36400U31X is a unit-mount breaker supported by a busbar, with busbar connections on the line and load sides. Its approximate 5.5 "W x 13.4 "H x 4.3"D dimensions should also correspond with the equipment configuration.