The RI-R60 by Contrel elettronica is an insulation monitoring device which is designed to control the insulation to earth in alternating neutral networks of 760V. Using this equipment, it puts a continuous signal within insulated line and earth having a possibility controlling its insulation reading resistance into dispersion that if produce for the earth. It comes with a two trip thresholds which can be adjusted via frontal micro switch in to a signal when it reaches below the threshold level. Also, it uses two free voltage changeover contact relays enabling it to do remote trip signalling. Each of the unit is designed to have a fail safe performance. Plus, it is supported with a test and rest push button for immediate action in a certain operation.