A Power Survey is the data gathering activity of all of the electrical consumption and distribution data parameters on the entire electrical distribution on an electrical installation.
It may be performed as a minimum, on the main electrical service point (e.g. substation secondary section or main electrical panel). The usual practice is to include all mayor loads in the entire electrical installation.
A Power Survey also includes a simplified Single Line Diagram which serves to correlate the points where the different power survey data were acquired. If the client does not have a copy of the single line diagram of his installation (a common occurrence), this will be an optimal moment to acquire the field data of all mayor electrical feeders and loads in the installation in order to reconstruct the same.
This information will be of paramount importance when the Power Survey data is analyzed for the application of Energy Distribution optimization and incorporating Energy Savings Engineering best practices and solutions.
As the result of the Power Survey, the Client will be provided with a Power Survey Summary Report of the data gathered. With this report, the Energy Savings Engineer will be able to secure enough information to determine (in conjunction with other field data and drawings) the optimum parameters for designing system improvements such as size and location of Fixed and/or Automatic Power Factor Correction Capacitors to be used for the improvement of the existing Power Factor. This information is also of paramount relevance for the implementation of many other energy saving measures as they may be applicable to the Client’s electrical installations.
Since all mayor equipment and electrical installations need to be accessed in order to perform a Power Survey it is common practice to perform simultaneously an Infrared Scanning (see definition) of such installations concurrently.