Accelerated Life Testing of Marine Electrical Insulation Systems Based on Frequency-Dependent Breakdown Analysis
Abstract
:1. Introduction
2. Methodology
2.1. Testing Equipment
2.2. Testing Process
2.3. Calibration Procedure
3. Results
3.1. Test Results
3.2. Power Model
3.3. Exponential Decay Model
3.4. Model Fit for Test Results
4. Discussion
4.1. Impact of Frequency on Insulation System Degradation
4.2. Suitability and Limitations of Mathematical Models
4.3. Performance Characteristics of Insulation System Design
4.4. Applicability of Experimental Results
5. Conclusions
- Failure time decreases as frequency increases: The test results confirmed a nonlinear reduction in failure time, with a 94% decrease from 381.83 h at 60 Hz to 22.33 h at 900 Hz, confirming the findings of previous studies on frequency-driven insulation degradation.
- Potential to reduce testing durations: Compared to conventional IEEE and IEC standards that require 5000 h of testing at 60 Hz, this study showed that equivalent degradation could be observed within 22.33 h at 900 Hz, demonstrating a 99.6% reduction in test time.
- Validation of mathematical models: The power model provided an excellent fit across all frequencies (= 0.99), while the exponential decay model proved highly accurate in the high-frequency range (600–900 Hz), confirming its suitability for high-frequency testing applications.
- Reliability of the insulation system design: The mica-based insulation system with epoxy resin showed strong durability under varying frequency conditions, ensuring stable and reproducible test results.
Funding
Data Availability Statement
Conflicts of Interest
References
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Item | Details |
---|---|
Manufacturer | Mohaupt |
Country of manufacturer | Austria |
Capacity | 50 kVA |
Maximum output voltage | 50 kV |
Frequency range | 50–1000 Hz |
Rated current | 1 A |
Frequency (Hz) | Breakdown Time per Specimen (h) | Average Breakdown Time (h) | |
---|---|---|---|
60 | 60-1 | 560 | 381.83 |
60-2 | 290 | ||
60-3 | 295.5 | ||
300 | 300-1 | 213.5 | 224.83 |
300-2 | 247 | ||
300-3 | 214 | ||
600 | 600-1 | 139 | 90.33 |
600-2 | 14 | ||
600-3 | 118 | ||
900 | 900-1 | 16 | 22.33 |
900-2 | 44 | ||
900-3 | 7 |
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Kim, H.-C. Accelerated Life Testing of Marine Electrical Insulation Systems Based on Frequency-Dependent Breakdown Analysis. J. Mar. Sci. Eng. 2025, 13, 500. https://doi.org/10.3390/jmse13030500
Kim H-C. Accelerated Life Testing of Marine Electrical Insulation Systems Based on Frequency-Dependent Breakdown Analysis. Journal of Marine Science and Engineering. 2025; 13(3):500. https://doi.org/10.3390/jmse13030500
Chicago/Turabian StyleKim, Hyeun-Chul. 2025. "Accelerated Life Testing of Marine Electrical Insulation Systems Based on Frequency-Dependent Breakdown Analysis" Journal of Marine Science and Engineering 13, no. 3: 500. https://doi.org/10.3390/jmse13030500
APA StyleKim, H.-C. (2025). Accelerated Life Testing of Marine Electrical Insulation Systems Based on Frequency-Dependent Breakdown Analysis. Journal of Marine Science and Engineering, 13(3), 500. https://doi.org/10.3390/jmse13030500