The relay operates from standard 5A secondary current transformers. Modules are available for use with either DC or AC control voltage sources.
Settings are programmable in the filed by connecting a personal computer or hand-held programmer to the unit, or remotely through a communication systems. The software necessary for the personal computer to communicate with the relay system is provided at no additional cost with each order. This software also gives the user access to the advanced monitoring and event recording features of the IMPRS.