Introduction: Partial Discharge (PD) is the primary cause of disruptive failure of High Voltage (HV) switchgear. The UltraTEV Alarm system continuously monitors for PD activity and alarms, using GPRS, when levels exceed threshold limits, allowing timely intervention by the DNO. This in turn enhances the way in which HV assets are managed and maintained and is making a positive impact on the safety of operators working within substations.

Objectives: The Ultra TEV alarm is a permanent fixed version of the Ultra TEV hand held devices that our substation inspectors are currently using. This proposal is to identify a suitable set of HV switchboards and install the Ultra TEV alarm system to provide continuous monitoring for PD which could lead to a disruptive failure.

It is also proposed to trial the use of GSM / GPRS connection from these units to the Nortech iHost solution. This will provide the facility to record individual events, enhancing the existing latching facility of the EA Technology hub.