Overview
The Westinghouse KB2250NW is a molded case circuit breaker engineered for industrial and commercial overcurrent protection. As a member of the Westinghouse KB-frame family, this 250-amp, 3-pole breaker operates at 600 volts and provides proven thermal-magnetic trip protection for critical electrical circuits. The KB2250NW is widely used in motor control centers, industrial switchboards, and factory electrical distribution systems where reliable fault protection and system availability are essential.
Key Features
- Rating: 250 amperes at 40°C ambient temperature
- Voltage: 600 VAC, 50/60 Hz operation
- Configuration: 3 pole (three-phase protection)
- Trip Unit: Thermal-magnetic, non-interchangeable design for consistent performance
- Frame Style: KB molded case architecture
- Fault Interrupt Capacity: 14,000 amps @ 600 VAC (typical for KB-frame 250A units)
- Connection: Bolt-on mounting for standard panelboard compatibility
Technical Specifications
The KB2250NW meets industry standards for molded case circuit breakers and delivers:
- Thermal-magnetic trip coordination with integrated overload detection
- Compact form factor suitable for space-constrained installations
- Manual on/off toggle operation for simple circuit control
- Standard lug configurations for 250A connections
- Designed to handle industrial motor starting and inrush currents safely
Typical Applications
The Westinghouse KB2250NW serves critical roles in:
- Three-phase motor protection and control circuits
- Industrial manufacturing equipment and machine tools
- HVAC and process control systems requiring 250A service
- Commercial/industrial panelboards and switchgear
- Facility electrical distribution and branch circuit protection
- Motor control centers (MCC) in automation and process plants
Compatibility & Replacements
Compatible With
- Westinghouse CDP panelboards
- Westinghouse motor control centers (MCC)
- Industrial switchboards designed for bolt-on breakers
- Electrical systems rated 600V, 50/60 Hz
- Three-phase power distribution equipment
Replaces / Drop-In Replacement For
The KB2250NW is a direct replacement for other Westinghouse KB-frame 250A, 3-pole, 600V circuit breakers within the same series. Verify compatibility with your system integrator or facility documentation before ordering to ensure exact match with your equipment.
Works With
- Standard three-phase 600V AC electrical systems
- Industrial power distribution networks
- Motor control and protective relay systems
- Facility metering and monitoring equipment
