Page 21 - Energize September 2021 HR

Data

1. Detect periodic step increase
of acetylene – Genuine internal
arcing or something else

2. Confirm with PD Monitor – High
Energy Events detected at each
C2H2 increase

3. Locate arcing winding & phase
– PD Triangle shows
HV winding phase H3

4. Identify the defect failure – PD
pattern shows floating object
in transformer

Decision

Inspect transformer focusing immediately
on phase H3 at HV side to find evidences
of discharges and floating potential objects

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