Product Short Description
Product Name Series C K-Frame Complete Molded Case Circuit Breaker
Product Introduction The Eaton KW3400 is a 3-pole complete molded case circuit breaker with integrated adjustable thermal-magnetic trip characteristics. It provides robust overcurrent and short-circuit protection for 600V AC and 250V DC electrical systems up to 400A.
Description
Technical Specifications
- Nominal Current Rating: 400A
- Adjustable Rating Plug Options: 200A, 250A, 315A, 400A
- Voltage Rating: 600V AC, 250V DC
- Number of Poles: 3 poles
- Interrupting Rating: 45 kAIC at 415V AC
- Trip Type: Adjustable thermal, adjustable magnetic
- Frame Size: K-frame, Series C
- Terminals: Line and load terminals included
- Dimensions: 4.1 in (depth) × 5.5 in (width) × 5.5 in (height)
- Weight: 11.84 lb
Functional Features
- Patented blow-open contact design enables fast fault clearing and extends contact service life
- Adjustable thermal trip curve supports application-specific overload protection coordination
- Adjustable magnetic trip threshold allows selective coordination with upstream and downstream protective devices
- World-class design meets global installation and compliance requirements
- Compatible with a full line of external accessories for harsh and hazardous environments
Application Scenarios
- Commercial and industrial panelboards and switchboards
- Motor control center feeder and branch circuit protection
- Busway power distribution systems
- Industrial manufacturing and process control electrical infrastructure
- Data center power distribution units
Material & Construction
- Reinforced thermoset composite housing for high dielectric strength and impact resistance
- Silver-cadmium oxide contact material for superior arc resistance and electrical conductivity
- Precision bimetallic elements calibrated for consistent thermal trip performance
- Optimized arc chute design for efficient arc quenching and fault current interruption
Operating Principle
- Thermal protection uses bimetallic strips that deform under sustained overcurrent conditions, releasing the trip latch after a calibrated inverse-time delay.
- Magnetic protection uses solenoid coils that generate magnetic force to actuate the trip mechanism instantaneously during short-circuit fault events.
Installation Requirements
- Panel mount installation in standard electrical enclosures
- Torque all terminal connections to manufacturer-specified values
- Maintain sufficient clearance around the breaker for proper heat dissipation
- Coordinate trip settings with other system protective devices for selective coordination
Certifications & Warranty IEC Rated, CE compliant 1-year warranty from installation date or 18 months from shipment date, whichever occurs first
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