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CUTLER HAMMER JD3250F – Industrial Molded Case Circuit Breaker Frame
Technical Specifications
• Voltage Ratings: 600 VAC, 250 VDC
• Current Rating: 250 A (frame only; trip unit ordered separately)
• Poles: 3
• Interrupting Capacity: 65 kA @ 240 VAC / 35 kA @ 480 VAC / 25 kA @ 600 VAC
• Trip Functions: LI (Long-Time & Instantaneous) via field-installable trip units
• Mounting: Bolt-on or plug-on; suitable for reverse feed
• Standards: UL 489, CSA, IEC 60947-2
• Dimensions: 4.13″ × 10″ × 4.06″ (H×W×D)
• Weight: ~3.5 kg (frame only)
Detailed content
Key Features
• Patented blow-open contact design ensures rapid arc extinction and superior short-circuit performance
• Interchangeable trip units allow on-site upgrades to electronic or adjustable magnetic types without replacing the frame
• HACR rated for HVAC/R applications and suitable for reverse feed installations
• Robust J-Frame construction withstands harsh industrial environments; proven 20+ year global installed base
• Patented blow-open contact design ensures rapid arc extinction and superior short-circuit performance
• Interchangeable trip units allow on-site upgrades to electronic or adjustable magnetic types without replacing the frame
• HACR rated for HVAC/R applications and suitable for reverse feed installations
• Robust J-Frame construction withstands harsh industrial environments; proven 20+ year global installed base
Typical Applications
• Power distribution: main and branch circuit protection in switchboards, panelboards, and motor control centers
• Motor circuits: protection of pumps, compressors, conveyors up to 250 A
• HVAC/R systems: chillers, cooling towers, large rooftop units
• Renewable energy: inverter AC output protection in solar and wind farms
• Oil & gas, mining, marine: rugged platforms requiring high interrupt ratings
• Power distribution: main and branch circuit protection in switchboards, panelboards, and motor control centers
• Motor circuits: protection of pumps, compressors, conveyors up to 250 A
• HVAC/R systems: chillers, cooling towers, large rooftop units
• Renewable energy: inverter AC output protection in solar and wind farms
• Oil & gas, mining, marine: rugged platforms requiring high interrupt ratings
Ordering Information
• Frame Only: JD3250F (3-pole, 250 A frame) – trip unit ordered separately
• Compatible Trip Units: TJD, LJD, EJD series thermal-magnetic or electronic types
• Accessories: shunt trips, undervoltage releases, auxiliary switches, lug kits
• Frame Only: JD3250F (3-pole, 250 A frame) – trip unit ordered separately
• Compatible Trip Units: TJD, LJD, EJD series thermal-magnetic or electronic types
• Accessories: shunt trips, undervoltage releases, auxiliary switches, lug kits
Installation Notes
• Torque lugs to 275 lb-in (31 N·m) for aluminum/copper conductors
• Accepts wire sizes 1/0–500 kcmil (with appropriate lugs)
• Operating temperature −40 °C to +75 °C without derating
• Torque lugs to 275 lb-in (31 N·m) for aluminum/copper conductors
• Accepts wire sizes 1/0–500 kcmil (with appropriate lugs)
• Operating temperature −40 °C to +75 °C without derating
