You can use automatic extension triggering to capture data for multiple faults in the same recording period. If a second trigger fires while a disturbance recorder is capturing data because of the firing of a prior trigger, the disturbance recorder can automatically extend the recording period to capture both faults. Recording stops when the second trigger is no longer active. Automatic extension triggering is especially useful for monitoring multi-phase power systems, because a second fault may occur on a channel that is different from the first fault. The following figure shows automatic extension triggering.