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EA Technology has launched what is said to be the world’s most powerful and versatile portable system for investigating and recording Partial Discharge (PD) activity in live MV and HV assets.

The dual-probe UltraTEV Locator instrument features six different sensor technologies to detect and gather information about PD activity.

Neil Davies, EA Technology director, said: ‘The UltraTEV Locator is much more than a PD fault-location tool.

‘In common with our other new third-generation PD products, it’s a multi-functional system that delivers a highly detailed assessment of the condition of live assets, so operators can optimise maintenance and prevent faults developing into failures,’ he added.

Both of the UltraTEV Locator’s probes use ultrasonic and Transient Earth Voltage (TEV) sensors to locate and measure PD activity on the surface of assets and internally.

The system also measures environmental conditions that affect PD, in the form of temperature, relative humidity and air pressure.

PD activity in cables is measured using a plug-in Radio Frequency Current Transfer (RFCT) sensor, displaying results as pC numerical values or in graphical form.

In one-shot survey mode, a single probe is used to detect and measure the presence of PD activity.

Switching to location mode, both probes are deployed, using time-of-flight measurement to calculate the site of PD activity to an accuracy of 2ns, equivalent to 60cm.

In comparative measurement mode, operators can measure surface PD activity in the form of decibel readings in the ultrasonic range and compare results with those taken from other assets.

All measurements taken by the system, including heterodyne sound recordings, can be saved to the UltraTEV Locator’s internal memory and recalled on the touch-screen display.

The battery-powered UltraTEV Locator is supplied in its own carry case and is compatible with a range of accessories, including the Ultradish directional microphone and additional contact probes, to further increase its versatility.

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