Electrical Testing

Standard Tests: AS/NZS 60076.1-2005

• Dissolved Gas and PCB Analysis
• Winding resistance Per Tap
• Winding resistance HV & LV
• Insulation resistance HV & LV
• Turns ratio

Trending & Condition Monitoring Tests:

• Turns ratio and excitation current
• On-load tap changer condition
• Leakage reactance
• Insulation condition (capacitance, tangent delta, power factor)

SFRAX - Sweep Frequency Response Analysis - Finger Print

• Core movements
• Faulty core grounds
• Winding deformations
• Winding displacements
• Partial winding collapse
• Hoop buckling
• Broken clamping structures
• Shorted turns and open windings
• Etc

IDAX 300 - Insulation Diagnostic Analyser Dielectric Frequency Response also known as: Frequency Domain Spectroscopy

• Changes in insulating materials (ageing) affect the capacitance and loss factor (PF, tan&)
• Frequency sweep, compared to traditional one-frequency Power Factor ( Doble) test, provides a lot more information on:
• Insulation characteristics
• Moisture/Ageing effects
• Influence of temperature
• Etc