SEE OR SEARCH CLASS: 335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, appropriate subclasses for electromagnetically operated switches in which an electromagnet is used as a source of force to separate two or more contacts.
(an electromagnet; is used; as a source of force; L:electromagnetically operated switches)
an electromagnet
is used
as a source of force L:electromagnetically operated switches