The Power Interface is the heart of the Epoch Protection System and its purpose is to collect and process voltage and current signals in order to perform the protection functions for the system.

It controls the main-contactor for each outlet and the design makes it quick and easy to install. The Power Interface enclosure has been designed to provide protection from electrical noise and as such ensures reliable operation in harsh target environments, such as high voltage switching cabinets. There are two intrinsically safe devices certified to ‘Ex ia’ installed in a Power Interface unit, the Real Time Clock (RTC) Flag Relay and the EFLO Barrier. When the EPIM unit is powered, the RTC Flag Relay and EFLO Barrier are not suitable for installation in a hazardous area and it is recommended that an ‘Ex d’ enclosure be used. When the EPIM is not powered, the RTC Flag Relay and EFLO Barrier are suitable to be installed or present in a hazardous area.