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PrecisePD is an on-line Partial Discharge Spot Testing and Location System for Cables and Switchgear with advanced signal processing, used for the detection of PD in high noise environments. PrecisePD allows users to investigate and locate Partial Discharge sources on live electrical equipment, helping to prevent potential faults in high voltage assets. Designed by IPEC Ltd, the PrecisePD Spot Tester takes advantage of the many years of IPEC’s field experience. Using the advanced DeCIFer (designed to operate in high noise environments) the unit offers significant advantages over many other Spot Testing systems.

Key Features

PrecisePD is a simple to use product for routine operation, additionally incorporating more advanced features for the experienced engineer to completely analyse and see a clear picture of discharge activity. The built in reporting system collates the necessary data and information for subsequent detailed analysis where required.

  • Sensitive PD detection in high noise environments
  • Test cables up to 4km in length
  • Accurate Cable PD Mapping for defect location
  • Integrated cable length measurement
precise-pd results ipec

Key benefits

Personnel Safety Device

ensure the substation is clear of PD before conducting work

Ensure accurate results

auto separation when the device detects background Noise instead of real PD

Ergonomic and compact design

fits in the user’s pocket and Is easy to use

Long lasting battery

allowing a whole day of testing without requiring a recharge

Spec sheet

ipec Precise-PD equipment

TEV Partial Discharge Spot Testing

Different sensors are used depending on the plant being inspected, each sensor being tuned to give optimum performance. The system samples the analogue signals from the Partial Discharge sensors at an extremely high rate, as to give the best possible resolution and sensitivity. The data acquisition in use has the following features;

  • 100MS/s sampling frequency
  • 14 bit resolution
  • Spike and surge protection electronics
  • Power cycle synchronisation for phase resolved analysis

The system will automatically detect and classify PD using the DeCIFer® algorithm, effectively distinguishing between PD and noise. Data can be collected over a very short period or for multiple days of testing- giving the user full flexibility.


on-site PD survey using PrecisePD

Online Partial Discharge Location

Locating the source of PD whilst the system remains energised, PrecisePD™ uses advanced signal processing to identify PD within noise, resulting in clear and highly accurate cable PD maps.

  • Network Reliability – Identifying & locating potential problems with high voltage networks before faults occur improves the reliability of the network through proactive asset management. A better understanding of network conditions allows for planned maintenance to be scheduled, reducing the effect on domestic or industrial customers and improving overall performance.
  • Cost Effective – Unplanned network interruptions can be minimized with controlled and planned outages for maintenance. Predicting faults and targeting repairs early saves large operational costs and helps meet regulatory targets. Online mapping proves considerably cheaper to conduct than offline mapping.

On-line Cable Mapping offers a non-intrusive measurement of the location of PD in MV and HV cables, without a need for supply interruption. With the network live, IPECs PrecisePD™ equipment locates PD sources within an accuracy of 1% of the overall cable length.

The equipment consists of two components; iPD and mPD. Using these components together with the supplied IPEC sensors, this system offers the complete online cable mapping solution.