High Voltage Switchgear Repairs Alert

 

An experienced high voltage worker suffered a fatal electrical shock while performing maintenance and repairs on a 3.8kV primary switchgear in a substation. The two main high voltage infeed supplies were opened (turned off) and tagged by the local electrical authority. The switchgear had two primary fuse compartments. One compartment fed the in-service transformer, the second one fed an out-of-service transformer and had had the fuses removed. The second transformer had been out-of-service for a long time and was assumed to have been disconnected from the secondary buss at some point. There were no up to date single-line drawings for the workers to use.

 

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