The CR8400 series of wire lead transformers provides a high quality solution, at low cost for current sensing. Major applications include ground fault relays, current measurements, power monitoring and over/under current sensing. This series of transformers provides the benefit of a high accuracy remote monitor for cost sensitive projects. They are epoxy encapsulated to provide protection from the environment. Detailed information is available for operation in 20 to 1KHz systems. The CR Magnetics CR8400 series of current transformers are constructed using core material of a high grade laminated nickel alloy or silicon steel material. The styles have window opening sizes of .275" to .75" diameter.