Zhang, S. (iulie 2006), „Analysis of some measurement issues in bushing power factor tests in the field”, Trans Pwr Del, IEEE, 21 (3): 1350–56, doi:10.1109/tpwrd.2006.874616, …(the measurement) gives both negative power factor and negative resistive current (power loss).
powerstandards.com
Trial-Use Standard Definitions for the Measurement of Electric Power Quantities Under Sinusoidal, Nonsinusoidal, Balanced, or Unbalanced Conditions, IEEE, , ISBN0-7381-1963-6, Std. 1459-2000. Note 1, section 3.1.1.1, when defining the quantities for power factor, asserts that real power only flows to the load and can never be negative. As of 2013, one of the authors acknowledged that this note was incorrect, and is being revised for the next edition. See http://powerstandards.com/Shymanski/draft.pdfArhivat în , la Wayback Machine.
web.archive.org
Trial-Use Standard Definitions for the Measurement of Electric Power Quantities Under Sinusoidal, Nonsinusoidal, Balanced, or Unbalanced Conditions, IEEE, , ISBN0-7381-1963-6, Std. 1459-2000. Note 1, section 3.1.1.1, when defining the quantities for power factor, asserts that real power only flows to the load and can never be negative. As of 2013, one of the authors acknowledged that this note was incorrect, and is being revised for the next edition. See http://powerstandards.com/Shymanski/draft.pdfArhivat în , la Wayback Machine.
