Analysis of partial discharges for management of high-voltage assets has become commercialised in the last 20 years. Work at the University since 1993 has improved asset management techniques used by companies world-wide. This was achieved in two ways: first, improving power network reliability, enabled through two start-up companies employing 59 people and turning over £5m/annum; and second, by providing techniques for testing and verifying safety of new electrical power components for aerospace applications (e.g. A380). In four illustrative case studies, over £3m savings are identified for end-users through improved reliability of power networks. Further impact has been delivered by ensuring the reliability of power networks in aircraft.