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  3. 3 you have been asked to investigate a concen that...

Question: 3 you have been asked to investigate a concen that...

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3. You have been asked to investigate a concen that equipment fed from a 3 phase, 4 wire 600V panel, including control PLCs and variable frequency drives has begun to mis-operate, and in some cases overheat. The only information the field staff have provided is data pulled from a power monitor. It only provides the following information in Table 1. They also have historical readings prior to the system problems TABLE 1-Current Data 601VRMS .184A2-17.7 3.0A2-130.6 3.42A 4108.0 lc TABLE 2-Previous (1 month previous) Data VLL la lB lc 601VRMS 4.21A -14.0 3.40A 4-131.3 5.89A 4105,0 Determine (and prove) what has happened in this system Determine the Phase to Neutral voltages for each phase

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