If motor amps are not known an approximate value may be found.
Allen bradley heating element chart.
The old style type n heater elements are used with bulletin 709 motor starters and overload relay blocks.
Sizing heater elements for motor starters.
The rating of the relay in amperes at 40 c is 115 of the full load amps listed for the heater type no.
Refer to the specified table and use the controller size and motor amps to select the heater catalog number.
Westinghouse a200 overload relay heater elements for motor protection.
If the motor service factor is 1 0 or a maximum of 115 protection is wanted pick one size smaller heater than indicated.
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.
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Rockwell automation sales office or allen bradley distributor for additional information.
Consult local allen bradley office.
Allen bradley heating element chart.
Heater element selection procedure when temperature at controller is 10 c 18 f greater than temperature at motor ambient temperature correction the ambient temperature at the motor and controller is the same in most applications.
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Heater element selection the full load amps listed in the tables are to be used for heater element selection.
Allen bradley heater element chart.
Allen bradley overload relay heater tables for bulletin 709 509.
By eva june 4 2016.
Sizing heater elements for motor starters.
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By eva august 1 2020.
Heater table number is found in the column under the type of overload and phase.
0 18 0 20 0 22 0 24 0 26.
Pick heaters from the table below.
