Allen-Bradley W66 Heater Overload Element
The Allen-Bradley W66 Heater Overload Element is a critical component designed to provide reliable motor protection in industrial applications. As part of the Bulletin 500 Line Starters, this eutectic alloy-type heater element ensures optimal performance and safety.
Key Features
- Trip Class 20 Protection: Offers a standard response time, making it suitable for general-purpose motor protection.
- Type W Designation: Specifically engineered for use with Allen-Bradley Type W overload relays, ensuring compatibility and efficient operation.
- Full Load Amperage (FLA) Ratings:
- Size 1: 34.0 Amps
- Size 2: 35.5 Amps
- Size 3: 40.0 Amps
- Size 4: 43.0 Amps
- Ambient Temperature Ratings:
- Controller: 40°C (104°F)
- Motor: 40°C (104°F)
- Service Factor: Designed for motors with a service factor of 1.15 or greater, ensuring robust performance under varying load conditions.
Applications
The W66 Heater Overload Element is ideal for protecting motors in various industrial settings, including manufacturing plants, processing facilities, and other environments where reliable motor operation is essential. Its design ensures that motors operate within safe parameters, preventing damage due to overload conditions.
Installation and Compatibility
Designed for seamless integration with Allen-Bradley Bulletin 500 Line Starters, the W66 heater element ensures straightforward installation and reliable performance. Proper selection based on motor full load amperage and ambient conditions is crucial for optimal protection.
For detailed selection procedures and ambient temperature correction factors, refer to the Allen-Bradley Heater Element Selection guidelines.









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