About Us

We are High Voltage Partial Discharge Ltd (HVPD). Founded in 2006, we are experts in Partial Discharge (PD) testing and monitoring.

Our PD testing and monitoring systems help our clients to keep their production operations up and running by providing the best early warning indicator of electrical insulation deterioration in medium voltage (MV) and high voltage (HV) networks operating at 3.3 kV and above.

We supply a complete range of on-line PD surveying and diagnostic test technology, PD monitoring technologies and PD test services across the worldwide electricity supply industry.
More than 500 customers in over 100 countries already trust our technology to keep their electrical assets in-service. 

HVPD Founders

Dr. Lee Renforth
Dr. Lee Renforth
Dr. Lee Renforth studied Electrical and Electronic Engineering at the University of Manchester between 1986 and 1993 where he received a BSc, MEng and finally a PhD in 1993, in the field of HV insulation breakdown under sponsorship by the National Grid Company, UK. In 1994 he set-up IPEC Ltd where he was Managing Director for 10 years before leaving to set-up HVPD Ltd Manchester, UK in 2004. Over the past 10 years, HVPD have become one of the market leaders in the growing field of OLPD monitoring technology.
Dr. Ross Mackinlay

Dr. Ross Mackinlay
Dr Ross Mackinlay studied physics at Lancaster University (BA) and Oxford University (D. Phil), his D. Phil Thesis being on the topic of non-linear waves in plasmas. Following this, Ross was employed at the Electricity Council Research Centre, carrying out research and development in the area of electricity distribution equipment. In 1989, he became Head of Cables & Dielectrics at EA Technology after privatisation of the electricity industry in the UK. In 1993 he became Group Manager of cables and power technology at EA Technology. Ross left EA Technology in 1998 and, between 1998 and 2006, he ran his own company, High Voltage Solutions Ltd. Ross is considered one of the world's foremost experts in the field of diagnostic methods for high voltage plant, and has used his significant knowledge and experience of on-line PD testing to help develop a number of HVPD's PD test technologies and software packages.

HVPD Timeline 


  • Dr Lee Renforth sets up IPEC Engineering Ltd to develop products in the field of on-line partial discharge testing of high voltage plant


  • IPEC Engineering is merged with High Voltage Solutions Ltd to become IPEC High Voltage Ltd


  • Introduction of a 4-Phase Asset Management solution combining a complete range of OLPD spot test and monitoring technology


  • First £1M!


  • Renamed to High Voltage Partial Discharge Limited


  • Relocated to MediaCityUK, Salford, Manchester


  • Opening of HVPD China Office, Dalian, China

  • Winners of the Greater China Business Award 2013


  • Awarded two Queen’s Awards for Enterprise for Innovation and International Trade

  • Opening of HVPD USA Office, Houston, USA

  • Opening of HVPD Offshore Office, Newcastle, UK

  • Release of the HVPD PDS Insight™ Handheld Unit



  • UK Patent Office issued Patent Number GB2509457 for HVPD’s Remote OLPD Monitoring Technology designed specifically for the OLPD monitoring of Ex/ATEX HV motors located in hazardous gas zones

  • Opening of HVPD Australia Office, Perth, Australia