Overview
The Westinghouse De-Ion Circuit Breaker 50A Tri-Pac is a surplus thermal-magnetic molded case breaker engineered for reliable overcurrent and short-circuit protection in industrial power distribution systems. The Tri-Pac lineup represents Westinghouse’s de-ionization technology for enhanced arc suppression and faster current interruption. This used unit provides a cost-effective solution for legacy equipment maintenance, panel upgrades, and OEM replacement applications where proven Westinghouse performance is required.
Key Features
- Thermal-Magnetic Trip Mechanism: Provides fast, reliable overcurrent detection and interruption under both overload and short-circuit conditions.
- De-Ionization Technology: Westinghouse de-ion design ensures superior arc extinction and improved safety margins.
- Molded Case Construction: Heavy-duty casing protects against environmental contamination and mechanical shock.
- UL/CSA Listed: Meets National Electrical Code (NEC) standards for branch circuit and distribution protection.
- Fast Current-Limiting: Interrupts faults within the first half AC cycle, reducing equipment damage risk compared to conventional breakers.
- Wide Voltage Range Compatibility: Suitable for 277V, 480V, and higher standard industrial distributions.
Technical Specifications
| Rated Current | 50 Amps |
| Product Type | Molded Case De-Ion Circuit Breaker |
| Manufacturer | Westinghouse Electric Corporation |
| Series | Tri-Pac |
| Trip Type | Thermal-Magnetic |
| Interrupting Capacity | Varies by voltage rating (typically 10kA–25kA) |
| Operating Temperature Range | -20°C to +60°C |
| Certifications | UL489, CSA Listed |
| Standard Mounting | DIN Rail or fixed panel mount |
| Condition | Used / Surplus |
Typical Applications
- Industrial panel upgrades and retrofit installations
- Motor control and branch circuit protection
- HVAC equipment power distribution
- Programmable logic controller (PLC) input/output module protection
- Distributed control systems (DCS) and instrumentation circuits
- Legacy equipment maintenance where original Westinghouse Tri-Pac breakers are specified
- OEM equipment replacement and spare parts inventory
Compatibility & Replacements
Compatible With
- Standard 35mm DIN rail systems
- Industrial control panels rated for 480Y/277V and 600V distribution
- Thermal-magnetic trip coordination schemes in legacy Westinghouse panels
- Power distribution systems requiring molded case de-ion breakers
Replaces / Drop-In Replacement For
- Westinghouse Tri-Pac models of equivalent frame size and current rating
- Legacy de-ionization breakers in existing Westinghouse installations
- Note: Verify exact interchangeability with your original panel documentation or system integrator before ordering.
Works With
- Thermal-magnetic trip devices and coordination relays
- Standard industrial power distribution designs per NEC Article 240
- UL489-compliant branch circuit protection schemes
