Description
Technical Architecture & Functional Positioning
The Eaton HFWF3063L is a three-pole molded case circuit breaker (MCCB) engineered for robust industrial power protection. As part of Eaton’s Series C portfolio, the HFWF type integrates thermal and magnetic trip elements—thermal providing overload protection based on sustained current above rating, and magnetic providing instantaneous trip on high fault current. This combination safeguards feeders, branch circuits, and downstream equipment from hazardous fault conditions.
In a typical electrical distribution hierarchy, this breaker is installed at the load-side of a main distribution bus, protecting motor feeders, control panels, and branch circuits serving motors, industrial automation systems, and auxiliary loads. Its F-Frame construction balances compact footprint with high interrupting capacity, making it suitable for factories, processing plants, OEM panels, and switchgear applications.
The rated 63 A continuous current capability handles moderate industrial load currents, while the 70 kAIC interrupt rating at 240 VAC indicates its ability to safely extinguish high fault currents encountered in industrial distribution networks without contact weld or damage. Fixed trip elements ensure predictable response, minimizing coordination complexity with upstream protective devices. The feed-through terminal design simplifies installation and allows direct line-to-load wiring in panel builds.
Engineered for high reliability and consistent protective performance, the HFWF3063L serves in systems where circuit protection must be dependable under transient load conditions, start-up currents, and short-circuit events.
Typical Application Scenarios
- Protection of three-phase motor feeders in manufacturing lines
- Branch circuit protection feeding industrial automation racks
- MCC and switchgear distribution panel circuit protection
- OEM electrical panels in packaging, processing, and material handling
- Protection of auxiliary circuits in HVAC and utility systems
- Replacement for legacy breakers in industrial power systems
Quality Standards & Testing Procedures
Industrial MCCBs such as the HFWF3063L are subject to rigorous quality validation due to the critical role they play in electrical safety and system protection. Each unit undergoes a standardized quality assurance protocol:
Visual & Mechanical Inspection
- Inspection of housing, terminals, and contact assemblies for mechanical integrity.
- Verification of thermal element placement and magnetic trip construction.
Electrical Functional Testing
- Verification of rated interrupting capacity at defined voltage levels.
- Trip performance validation under overcurrent and fault simulation.
- Thermal element calibration checked against ambient temperature standards.
Terminal & Connection Integrity
- Feed-through terminal resistance and torque verification to ensure low impedance connections under load.
Safety Verification
- Compliance with IEC and industrial protection standards, ensuring correct trip characteristic under fault scenarios.
Final QC & Documentation
- A Quality Test Certificate is issued, documenting performance metrics and conformity to Eaton specifications.
