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Information about the OF contact do they switch direct with the main contact, or do they leads or lag instead of direct following the main contacts.

OF contact are mechanically linked to the crossbar, however they generally switch after the main contacts. time difference depends on the size and energy of the breaker, it is fom -1 up to 23ms after main contact switching. Have also in mind after switching OF contacts could bounce during up to 70ms, depends on the size of the breaker.
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