C.A. Spalding offers wound GFCI and AFCI differential transformers to those customers who do not want to wind and assemble their own components.
The cores used in differential transformers reliably measure ground faults of 5mA, 10mA, 30mA or more over the temperature range from -35oC to +80oC as required by UL Standard 943.
This is accomplished through the use of high permeability core materials in ring form. The high permeability is maintained after low resistance faults, which could drive the core into saturation and leave it in the remnant state.
Our group of engineers have more than 30 years of experience in the matter will be able to work closely with customers on their projects.
Please refer to our list of standard available products and drawings to select an option: