As @whee mentioned above, there are a variety of reasons that a voltage drop or spike could be happening. The resource that was provided shows just a few of these.
As far as providing value from the data provided, we’ve had an abundance of cases where users have utilized the data provided to come to a solution. Below are 15 different users that have used Power Quality to isolate an issue and worked with either the utility or an electrician to fix their Power Quality, with steps on how they came to their resolution. We have even more responses/feedback from users that have utilized Power Quality in one way or another.
| Result | URL |
|---|---|
| Undersized transformer | Power Quality - July AC voltage sag |
| Transformer upgrade | Power Quality - Applying data to fix poor power (success) |
| Substation tap changer | Power quality issue:. Dips over 40 in month |
| Suspected loose neutral | Power Quality - 1000+ Spikes or Dips in Last 30 Days |
| Water corrosion in panel | Power Quality - Voltage dips 335 times in 4 days |
| Loose neutral | Power Quality - A high Number of of Voltage Dips or Spikes |
| Loose breaker/arcing | Power Quality - Issues after a big storm |
| Failing phase | Power Quality - Failing Phase |
| Transformer issue | Power Quality - Transformer Replacement |
| Solar inverter error | Power Quality & Solar |
| Faulty AC from neighbor | Power Quality - 33x Voltage dips in the last month |
| Suspected transformer | Power Quality - High Number of Voltage Dips |