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W78

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Manufacturer: Allen Bradley - Miscellaneous
Product Type: Automation Product
Part Number: W78
Series: misc

Description:

Designed and produced by Allen Bradley / Rockwell Automation, part number W78 is a Eutectic Alloy overload relay. This Type W heating element has an overload class of 20. It features standard overload relay protection. The trip time of this device is 20 seconds at 600 percent the rated current. This device has an ambient temperature rating of +40 degrees Celsius at the controller, as well as at the motor. The W78 overload relay has a full load ampere rating of 98 amperes for a size 3 device, as well as 108 amperes for a size 4 device.



Automation Stop is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with Automation Stop's 1-year warranty.

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  Warranty

We proudly offer a one year Automation Stop warranty on most products.

Rockwell Disclaimer: The product is used surplus. Automation Stop is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Automation Stop is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Automation Stop also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. Automation Stop also makes no representations as to your right to install any such firmware on the product. Automation Stop will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Part number W78 is an overload relay heater element by Allen Bradley. It is a Eutectic Alloy overload relay. It offers consistent and precise protection, as well as a high level of dependability. It has a lower sensitivity to variations in ambient temperature, lowering the risk of nuisance tripping under running conditions. This heating element offers standard overload relay protection to Bulletin 500 products from Allen Bradley. It is suitable for use in magnetic motors and motor controllers to provide protection against overheating that can occur due to excessive overcurrents.

This overload relay belongs to class 20 as per US industry standards. This implies the W78 overload relay would trip in 20 seconds or fewer at 600 percent of its rated current. The ambient temperature of this heating element at a controller is +40 degrees Celsius, or +104 degrees Fahrenheit. Its ambient temperature at a motor is also +40 degrees Celsius, or +104 degrees Fahrenheit. The ambient temperature at the motor and controller is usually the same in most applications. The overload relay is intended to detect changes in ambient temperature and safeguard the motor across a wide temperature range under this condition. It has a service factor of 1.15 or greater.

The W78 offers a full load ampere rating of 98 amperes for a size 3 device. Additionally, the W78 heating element has a full load ampere rating of 108 amperes for a size 4 device. However, this Type W Heater Element presently does not fulfill the EU ROHS material restrictions.

We offer UPS shipping. Including Ground, 2nd Day Air, Next Day Air and Early AM. Some of our products have a short lead time, so please contact us if you need any item faster than the lead time shown. If you need to order an item internationally please contact us prior to checking out so we can get you a shipping quote. We can ship UPS or DHL internationally. We can also ship on your UPS or FedEx account number.
If the item is found to be defective within 30 days of the invoice date, a full refund can be issued. If an item is found to be defective through normal use and wear after 30 days but within the 1 year period, the Automation Stop Warranty dictates the appropriate course of action. After the 30 day period, Automation Stop reserves the right to decide between refund, repair, or replacement with identical product. Because of the high volume of outgoing and incoming shipments on a day to day basis, we unfortunately cannot accept returns on items ordered mistakenly or part numbers ordered incorrectly. If a special exception is approved, a 20% restocking fee will be assessed. If you have any questions please contact us at [email protected].

FAQ

Question: Does Automation Stop offer repairs on the W78?

Answer: Yes. We offer repairs for the W78 and it comes with our 1 Year Automation Stop Warranty.


Question: What type of warranty comes with the Allen Bradley - Miscellaneous and W78?

Answer: If you buy the W78 through Automationstop.com it comes with our 1 Year Warranty and no other warranties.


Question: Can I buy the W78 online?

Answer: Yes. Automation Stop sells the W78 online and you can check out for the quantity and condition listed available above.


Question: What is the manufacturer for the W78?

Answer: The W78 is made by Allen Bradley - Miscellaneous.


Series information for W78

For additional information about W78 check the data sheet or manual. Also check the manual PDF for all wiring diagrams, compatibility, troubleshooting, specifications, installation instructions, and accessories (such as batteries, terminal blocks, or cables) regarding W78.

Revision Part # Also Known As Availability
W78/A W78 Ser A, Series A, Rev A Request a Quote

Common Misspellings:

  • W7B

Automation Stop sells used surplus products. Automation Stop is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by Automation Stop come with Automation Stop’s 1-year warranty and do not come with the original manufacturer’s warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.

Rockwell Disclaimer: The product is used surplus. Automation Stop is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Automation Stop is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Automation Stop also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. Automation Stop also makes no representations as to your right to install any such firmware on the product. Automation Stop will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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