The VIA has been designed specifically for Ground Fault Indication on Wye or Delta-connected, three-phase, three-wire, resistance grounded or ungrounded power systems. It may be used on systems between 120 volts or 600 volts (up to 690 without CSA approval) or up to any voltage with the use of 120 volts or 240 volts potential transformers (PT’s). Additionally, the VIA can detect DC ground faults on Variable Frequency Drives that are on AC fed systems. One or more optional flush mounted external displays (VIA -R) can be mounted on panel doors or other locations. Isolation inside the VIA protects the external displays from high voltages.