Allen Bradley Overload Heater Sizing

This provides class 20.

Allen bradley overload heater sizing.

That overload relay you have is basically the same one that would go on a size 1 starter usually limited to 27a. B controller size b motor amp b phase 1. According to nec the general requirement for overload sizing be set around 115 or 125 from full load ampere we should setting the overload relay within this parameter to avoid electric motor from serious damage. Refer to the specified table and use control size and motor amps to select the heater code number.

Type w heater elements for bulletin 509 starters table 150. Allen bradley standard overload relay protection is provided using type w heater elements for the 500 line. In this episode daryn sheds light on the importance of motor starter heater sizing how to do it properly and efficiently. The allen bradley heater tables below are two of the most common used for sizing standard overload relay protection for type n and type w heater elements.

Sizing for overload is important to avoid serious damage for electrical application such as motor starter machinery or others electrical equipment. Automation is our foundation. Heater table number is found in the column under the type of overload and phase. Find heater table number below using the product class type of enclosure and control size.

Allen bradley standard overload relay protection using either type n or w heater elements provide class 20 operation and are recommended for general application. Allen bradley heater tables. A class 30 overload relay will trip in 30 seconds or less at a current equal to 600 percent of its rating. The next column to the right would be for a size 2 overload and so on.

While the type w heater elements are used with current bulletin 509 motor starters and overload relay. A class 30 overload relay will trip in 30 seconds or less at a current equal to 600 percent of its rating. A class 20 overload relay will trip in 20 seconds or less at a current equal to 600 percent of its rating. Control size motor amp phase enclosure 1.

Find heater table number below using the product class controller size and phase. 0 18 0 20 0 22 0 24 0 26. Heater table number is found in the column under the type of overload and phase. If motor amps are not.

If motor amps are not. We are dedicated innovators delivering smarter connected solutions to the world around us. The old style type n heater elements are used with bulletin 709 motor starters and overload relay blocks. Refer to the specified table and use the controller size and motor amps to select the heater catalog number.