Dielectric Strength
We are considering using e-coat to paint electrical cabinets and wanted to know if you could tell me the dielectric strength of e-coat and the relationship with electrical isolation.
Share
Q. We are considering using e-coat to paint electrical cabinets and wanted to know if you could tell me the dielectric strength of e-coat and the relationship with electrical isolation. Thank you in advance. K.F.B.
Featured Content
A. The dielectric strength of a material defines its capacity to withstand electrical fields without breaking down, and the formation of an electrically conductive path.
For a cured e-coat film, the value of the dielectric strength depends on the type and proportions or ratios of the specific resin and pigment used by your e-coat supplier, and to the degree or percentage of cure accomplished. For a normally cured automotive e-coat film, cathodic epoxy, black, and with a medium p/b ratio of 0.1 - 0.2, the dielectric constant of the cured film is 3.9 MVolts/meter. As a comparison, the dielectric constant of neoprene rubber is five times greater.
The more e-coat film you apply, the more electrical resistivity your electrical cabinets will have. Additionally, the resistance of the cabinet for voltage jumps will be increased.
RELATED CONTENT
-
Measuring the Surface Area of Fasteners
How do you measure the surface area of a threaded fastener? How much coating would you put on it? How thick of a coating? What about non-threaded fasteners? The U.S. Department of Agriculture’s Forest Service, of all people, may have come up with the solution for those pondering how to coat sometimes-difficult small pieces using computer imaging and software to compute the area.
-
Five Principles of Lean Manufacturing from Toyota Production Systems
Fostering Sustainable business and People success through new ways of thinking
-
Salt Spray Vs. Cyclic Corrosion Tests
Joseph Subda, ecoat specialist for Axalta Coating Systems, explains the difference between these two corrosion resistance tests.
