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How Harmonic Currents from Inverter Chargers Led to Catastrophic Neutral Overheating at a Municipal Golf Course
This case study examines a catastrophic electrical failure at a municipal golf course following the installation of inverter-type golf cart chargers. Excessive triplen harmonics generated by the new chargers caused severe overheating of the neutral conductor, resulting in a fire and significant property damage. The investigation highlights the critical importance of power quality studies and appropriate system upgrades when integrating modern non-linear loads.
Key topics include:
- Initial Conditions
- Cart & Charger Replacement Program
- Power Quality Study Findings
- Main Panel Service Drop Neutral
- Incident Analysis and Consequences
Why utilities should care:
Understanding the risks posed by non-linear loads and harmonic currents is essential to prevent infrastructure failures, ensure system reliability, and avoid costly outages or damage when integrating modern equipment such as inverter-based chargers.
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