The HVPD Kronos® Spot Tester is a six-channel, synchronous, battery-powered test unit with a rugged and compact design optimised for field portability

Quick and easy to set up, it detects early stages of insulation deterioration, providing an early warning against MV and HV insulation faults, and supports condition-based maintenance schemes, reducing unplanned outages, downtime and maintenance costs.


Can be used on the following assets:

Compatible Sensors

HVPD Kronos® Ultimate Software

The HVPD Kronos® Ultimate software contains all the tools needed for data acquisition, analysis of PD trends and phase resolved partial discharge (PRPD) patterns as well as report generation.

To identify different PD sources from noise a range of data analysis tools are available within the HVPD Kronos® Ultimate software, including PD event recognition, pulse waveform clustering and machine learning.

Six Synchronous Channels

With synchronous acquisition on six sensors the HVPD Kronos® Spot Tester can be used to test multiple assets at once in addition to comparing data from different sensors.

Test Using Pre-installed Sensors

Connect to any pre-installed PD couplers.

Reference Frequency Synchronisation

To synchronise the acquisition for analysis of PRPD patterns, multiple reference frequency sources are available including an integrated photodiode and mains field detector, AC line supply and an external sensor input.

Cable Mapping 

PD locations can be pinpointed along the length of power cables from one end of the cable (single ended) or with addition of the transponder at the far end of the cable (double ended).

Precedence Detection

Statistical PD pulse precedence detection enables PD locations in MV metalclad AIS by determining which sensor PD signals arrive at first.

UHF Testing

The UHF converter expands the detection frequency range to allow detection of PD in using portable or permanent UHF sensors and couplers in HV/EHV GIS and transformers.

Offline PD Testing

For factory and site acceptance tests, the HVPD Kronos® Spot Tester can be used for off-line testing with power frequency or resonant test sets.

MCSA Testing

With Motor Current Signature Analysis (MCSA) the HVPD Kronos® Spot Tester can analyse the rotor condition of rotating machines to identify issues such as damaged rotor bars and eccentricity. MCSA testing is non-intrusive and is carried out by analysing the frequency content of the 50/60 Hz current waveform.

Spot Testing and Short-Term Monitoring

The HVPD Kronos® Ultimate software is installed on a laptop for spot testing or Portable Partial Discharge Monitoring Server (P-PDMS) for short term monitoring.

The Portable Server enables set-up of the monitoring session and data storage. Remote access to the system and cloud integration is possible via an optional modem.


Classroom and at-site training courses are available, covering use of the HVPD Kronos® Spot Tester in the field and data analysis with the HVPD Kronos® Ultimate software.

Contact us

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