WTI TRIP ABB — Transformer Overtemperature / Insulation Fault
At a glance
- Severity
- FAULT STOP
- Domain
- MV_SUBSTATION_SYSTEM
- Reference standard
- CEI 0-16 / IEC 60076
What it means
MV/LV transformer overheating or insulation failure: loss of one supply chain and fire risk in the substation.
Probable causes
- Sustained overload or imbalance
- Insulating oil degradation and loss of dielectric strength
- Insufficient room ventilation
- Oxidized or loose connections
Where to start
Read WTI/OTI (windings/oil), thermography of the transformer and the actual load split.
Full guided diagnosis in the app
The diagnostic tree for this fault has 3 guided steps with measurements, checks and resolutions. You'll find it in DataCIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More ABB codes
- 51 TRIP — LV Main Breaker Trip
- FEEDER TRIP — Loss of One MV Feeder
- MV BREAKER TRIP — Total MV Supply Loss
- PHASE UNBALANCE — Phase Imbalance Upstream
- SPD END OF LIFE — SPD Cartridges Depleted
- 2310 — Overcurrent Fault
- 2330 — Ground Fault
- 3210 — DC Bus Overvoltage Fault