The part UR-8GH, is a CT/VT module as specified by the ‘8’ contained in the part number following the ‘UR’ designation. All CT/VT modules of the UR relay series have this number for the CT/VT modules. The UR-8GH is one of the newer CT/VT modules. A UR-8GH Multilin CT/VT module has the sensitive ground 4CT/4CT configuration. The other order options of the new CT/VT modules are the 8F option (standard 4CT/4VT), the 8H option (standard 8CT), the 8J option (sensitive ground 8CT), the 8L option (standard 4CT/4VT with enhanced diagnostics), the 8M (sensitive ground 4CT/4VT with enhanced diagnostics), the 8N (standard 8CT with enhanced diagnostics), and the 8R (sensitive ground 8CT with enhanced diagnostics). Up to 24 voltage transformer and current transformer signals are able to be configured by the Multilin UR CT/VT modules in order to monitor the power lines. Either 5 A and 1 A current transformers are supported by the module. The sensitive ground option for some of the CT/VT modules listed above means that they have the ability to provide the unit with ground fault protection even when the grounded systems are classified as high-impedance situations.