HVPD Kronos® Permanent Monitor 

Continuous, Synchronous, On-line Partial Discharge (OLPD) Complete Network Monitoring with Benchmarking and Trending of Data

The HVPD Kronos® Permanent Monitor is an on‑line partial discharge (OLPD) insulation condition monitoring (CM) system suitable for the long-term, continuous monitoring of complete high voltage (HV) networks of 3.3 kV and above. The 24-channel HVPD Kronos® captures up to six signal channels synchronously using its unique full cross point Smart Multiplexer and provides information to help network operators avoid unplanned outages.
All HVPD Kronos® Monitors distributed across the network communicate back to the central Partial Discharge Monitoring Server (PDMS) for coordination and organisation of data. The insulation condition data is then uploaded to the central HVPD OLPD Measurements Database© installed at the customer’s control centre, for logging, benchmarking and trending. HVPD Kronos® is expandable and can be installed both indoor and outdoor. We supply HVPD Kronos® Monitors with a range of condition monitoring service contract options and sensors.

Noise Reduction Performed with HVPD Kronos® Software using the Event Recogniser© Software Module

The HVPD Kronos® software enables discrimination against electromagnetic noise and interference. The below OLPD monitoring results show that only around 1 pulse in 1000 detected by the monitor is a partial discharge pulse, the remaining 999 being noise.


  • Continuous OLPD monitoring technology suitable for the insulation condition monitoring of incipient HV insulation faults and OLPD trends in HV networks.
  • Suitable for monitoring complete HV networks, including cables, switchgear, transformers and rotating HV machines.
  • With 24 sensor inputs, a single HVPD Kronos® Permanent Monitor covers up to four HV motors.
  • The 24-channel HVPD Kronos® captures six signal channels synchronously using its unique Smart Multiplexer.
  • The HVPD Kronos® distributed across an HV network continuously transfer the insulation condition data to the central HVPD OLPD Measurements Database© installed at the customers control centre for logging, benchmarking and trending of data through upload to the HVPD data centre.
  • Generates a simple OLPD Criticality number for the asset from 0‒100% through benchmarking and trending with the central HVPD OLPD Measurements Database©.
  • Remotely accessible via a wide range of industry communications standards, including Modbus, DNP3.
  • All HVPD Kronos® are networked and communicate back to the central Partial Discharge Monitoring Server (PDMS) for coordination and organisation of data.
1. Raw Data
2,859,719 (100%) data points acquired over 36,073 power cycles.
This HV insulation CM solution provides information to help HV network operators to avoid unplanned outages caused by insulation faults across their network. For the oil & gas industry, these have been reported to cost an average of $220k per hour, $5,280,000 per day (ABB Technical Paper, "Motors & Generators Optimized Cost of Ownership" 2013). Based on this analysis the initial capital cost of a complete network monitoring system is paid back through the avoidance of one unplanned outage on the network.