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The W56 thermal overload relay heater element, manufactured by Allen Bradley, is intended for applications with continuous duty motors. Rated for 600 volts AC, it utilizes eutectic alloy technology for effective overload protection, complying with NEMA ICS 2, Part 4 standards.
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Technical specifications for W56
| Manufacturer | Allen Bradley |
|---|---|
| Product Type | Thermal Overload Relay Heater Element |
| Product Line | Bulletin 500 Accessories |
| Part Number | W56 |
| Weight | 0.06 lbs (0.03 kg) |
| UPC | 781180154362 |
| Rated Voltage Compatibility | 600 V AC |
| Relay Class Compliance | NEMA ICS 2, Part 4 |
| Overload Relay Type | Eutectic Alloy Overload Relay |
| Trip Time at 600% Rated Current (Class 20) | ≤ 20 seconds |
| Trip Time at 600% Rated Current (Class 10) | Not applicable (Type J only) |
| Trip Time at 600% Rated Current (Class 30) | Not applicable (Type WL only) |
| Motor Duty Compatibility | Continuous duty motors with service factor ≥ 1.15 |
| Heater Element Type | W (Eutectic Alloy) |
| Trip Class | 20 |
| Size 00–0 Full Load Amperes (FLA) | 14.6 A |
| Size 1 Full Load Amperes (FLA) | 15.0 A |
| Size 2 Full Load Amperes (FLA) | 15.1 A |
The Allen Bradley W56 thermal overload relay heater element plays a crucial role in protecting motors from overheating conditions. This component has a voltage rating of up to 600 volts AC, ensuring compatibility with a wide range of electrical systems. Constructed with eutectic alloy technology, it delivers efficient overload protection, complying with the standards set forth by NEMA ICS 2, Part 4.
This heater element offers rapid trip capabilities, with a maximum trip time of 20 seconds when subjected to 600% of its rated current in Class 20 applications. It's important to note that trip times for Class 10 and Class 30 scenarios are not applicable for Type J or Type WL overload relays, respectively. Thus, the W56 is primarily suited for settings where Class 20 operations are predominant.
Designed for use with continuous duty motors exhibiting a service factor of 1.15 or greater, this unit ensures that motors can operate within safe limits under varied load conditions. The W56 thermal overload relay supports various sizes, with specific full load amperes (FLA) ratings: 14.6 A for Size 00–0, 15.0 A for Size 1, and 15.1 A for Size 2. Each of these specifications helps ensure that the relay effectively safeguards motor functions against overload scenarios, making it an essential component in many industrial applications.