The Case of the VFD Clock Culprit

The Case of the VFD Clock Culprit

Forensic engineers eliminate multiple theories behind the death of technician troubleshooting a factory air compressor, ultimately discovering one unlikely wiring arrangement was to blame.

The day started out like any other for one electrical technician employed by a variable-frequency drive (VFD) manufacturer. He went to work as usual, resuming a service call at a factory where he’d been working as a subcontractor all week troubleshooting an air compressor, which included a VFD to control its speed, that had been put out of service by a lightning strike. Tragically, the work day was cut short when an employee found him lying on the floor close to the panel with a head wo

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