Nota: A tradução desta entrada está atualmente em revisão de qualidade, portanto parte do conteúdo é exibida temporariamente apenas em inglês.
Este verbete ainda não foi traduzido para o seu idioma, portanto o original é exibido abaixo.
dielectric absorption
This term is a specialized technical expression used primarily in electrical engineering and materials science. It describes a specific parasitic effect where a dielectric material behaves like a temporary battery, storing charge that leaks back into the circuit after the power source is disconnected. This creates a "charging current" that can mislead technicians into thinking insulation is better or worse than it actually is.
Because this is a specific physical phenomenon, it is treated as an uncountable noun. It does not refer to a discrete object that can be counted, but rather to a process or property of a material. In professional reports, it is typically discussed in terms of its "magnitude" or "effect" rather than as a countable entity.
Meanings
The phenomenon in which an electrical charge remains stored in a dielectric material after the external voltage source has been removed, resulting in a residual current flow when the material is reconnected to a circuit. In electrical engineering and capacitor testing, this effect manifests as a slow decay of voltage over time, which can lead to inaccurate measurements of insulation resistance if the measurement duration is too short.
The technician noted that dielectric absorption was causing a gradual increase in the measured insulation resistance over the ten-second test period.