The RGU-100A is a type-A ultraimmunized earth leakage protection and monitoring relay that is compatible
with the earth leakage transformers in the WGC range.
The device measures, calculates and displays the true RMS value of the residual current by using a residual
current input from an external measurement toroidal transformer in the WGC series.
The RGU-100A can be used to program and adjust all the parameters required to obtain complete protection
and control of the installation.