This technology has been designed specifically for the On-line PD monitoring of Rotating Machines, including Ex/ATEX HV motors and generators located in hazardous gas zones.

With this solution, which incorporates HVPD Kronos® Monitors and advanced software algorithms, it is possible to carry out remote On-line PD monitoring of complete HV circuits. This technology is not restricted to the Ex/ATEX motors and can monitor the insulation condition of cables, switchgear and transformers, achieving complete network monitoring.

This technique makes it possible to differentiate between all three types of PD that could originate from an HV motor feed circuit, including switchgear PD, cable PD and the different types of HV stator winding PD using a combination of wideband, HFCT and TEV sensors installed at the switchgear cable box.

In 2014, this solution also earned HVPD a Queen’s Award for Enterprise in the Innovation category.


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  • On-line Partial Discharge Testing and Monitoring of 11 kV Switchgear for an Australian Mining Operator View case study
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