Electric heater system

An electric heater includes a first bus bar, a second bus bar, a third bus bar, a neutral bus bar, a plurality of first heating elements, a plurality of second heating elements, and a plurality of third heating elements. A first end of each first heating element is coupled to the first bus bar for electrical communication therewith. The second end of each first heating element is coupled to the neutral bus for electrical communication therewith. A first end of each second heating element is coupled to the second bus bar for electrical communication therewith. A second end of each second heating element is coupled to the neutral bus for electrical communication therewith. A first end of each third heating element is coupled to the third bus bar for electrical communication therewith. A second end of each third heating element is coupled to the neutral bus for electrical communication therewith. 一种电加热器包括第一母线、第二母线、第三母线、中性母线、多个第一加热元件、多个第二加热元件和多个第三加热元件。各个第一加热元件的第一端联接到第一母线，以便与其电连通。各个第一加热元件的第二端联接到中性母线，以便与其电连通。各个第二加热