Production activities were occurring at the time and a cutter motor cable was found to be damaged.

Inspection and maintenance procedures must include the routine inspection of machine (motor) cables as well as enclosures, to identify issues such as build-up of fines or other debris that may cause damage, the MSU said in its weekly incident summary.

“Failure to adequately inform personnel of modifications to electrical plant had led to practices of resetting power following protection trips, without effective testing,” it said.

“Procedures for restoration of power following a protection trip must include methods that are to be followed by all personnel to identify the cause of the trip prior to restoring power.”