Product Short Description
Product Name KT Series 3-Pole Thermal-Magnetic Trip Unit
Product Introduction The Eaton KT3315TA is a 3-pole adjustable thermal-magnetic trip unit engineered for Eaton K-frame Series C molded case circuit breakers. It delivers precise overcurrent and short-circuit protection with configurable current thresholds for industrial power distribution systems.
Description
Technical Specifications
- Nominal Rated Current: 315A
- Adjustable Thermal Range: 250A to 315A
- Adjustable Magnetic Range: 1575A to 3150A
- Maximum Voltage Rating: 600V AC
- Number of Poles: 3 poles
- Trip Type: Adjustable thermal, adjustable magnetic
- Compatibility: Eaton K-frame Series C molded case circuit breakers
- Operating Temperature Range: -40°C to +85°C
Functional Features
- Front-facing adjustment dials enable simple current calibration without disassembly
- Precision bimetallic thermal element provides time-delayed overload protection
- High-sensitivity magnetic trip mechanism delivers instantaneous short-circuit response
- Compact form factor integrates directly with compatible circuit breaker frames
- Calibrated at the factory for consistent performance across operating conditions
Application Scenarios
- Industrial power distribution panels and switchgear assemblies
- Motor control centers and motor branch circuit protection
- Commercial facility electrical infrastructure
- Manufacturing plant process power systems
- Renewable energy power distribution systems
Material & Construction
- High-temperature thermoplastic housing for electrical insulation and mechanical durability
- Silver alloy internal conductive components for stable electrical performance
- Precision-calibrated bimetallic strips for accurate thermal trip response
- Wound magnetic coils for reliable short-circuit detection
Operating Principle
- Thermal protection operates via bimetallic strips that deflect under sustained overload current, releasing the circuit breaker trip latch after a calibrated time delay.
- Magnetic protection operates via solenoid coils that generate sufficient magnetic force to actuate the trip mechanism instantaneously during short-circuit fault conditions.
Installation Requirements
- Install exclusively into compatible Eaton K-frame Series C molded case circuit breakers
- Perform installation and adjustment by qualified electrical personnel
- Apply specified torque values to all terminal connections
- Verify compatibility with specific circuit breaker catalog numbers before commissioning
Certifications UL Listed, CSA Certified, IEC compliant
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