Partial Discharge Testing Services Australia
Detect Insulation Defects Before They Become Failures
Partial discharge (PD) is a localised electrical discharge within HV insulation that does not fully bridge conductors. Individually small, PD is a symptom of insulation degradation that will progressively worsen to complete failure if undetected. Megavar provides online and offline PD testing for cables, switchgear, transformers, GIS, and rotating machines across Australia.
Online PD Testing
Offline PD Testing
Equipment de-energised with external voltage source applied for more sensitive, calibrated measurement. Includes phase-resolved PD (PRPD) pattern analysis for defect classification using Omicron MPD 600, per IEC 60270.
Equipment We Test
- HV cables and joints — XLPE and oil-filled cables 11–220 kV. Void defects, contamination, termination/joint issues.
- Switchgear — AIS and GIS. Particle contamination, tracking, contact degradation.
- Power transformers — Bushing defects, tap changer insulation, winding degradation.
- Instrument transformers — Internal insulation defects that can cause catastrophic failure.
- Rotating machines — Stator winding insulation for generators and HV motors.
Standards
Per IEC 60270, IEC 62478, CIGRE TB 728/861, and IEEE 400. Results interpreted by experienced engineers who classify severity, type, and likely defect location.
Check the MPD 600 partial discharge system.
Frequently Asked Questions
Partial Discharge Testing Services Australia
What is partial discharge testing?
What is the difference between online and offline PD testing?
Can PD testing be done without a shutdown?
What defects can PD testing detect?
Does Megavar provide PD testing nationally?
Ready to commission your substation? Contact Megavar today on 1300 730 499 or visit our contact page to request a quote.
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