The infrared thermal imaging method of the parallel capacitor bank is implemented in accordance with UL/T 664-2008 "Infrared Diagnostic Application Specification for Live Equipment".
    Second, the diagnostic criteria
Table 3-17-1 Diagnostic criteria for current heating type equipment defects
Equipment category and location | Thermal image feature | Fault characteristics | Defect property | Handling suggestions | |||
General defect | Serious flaws | Critical defect | |||||
Capacitor | Fuse | Taking the capacitive side of the middle of the fuse as the hottest thermal image | Fuse capacity is not enough | The temperature difference does not exceed 10K, and the requirements for important defects are not met. | Hot spot temperature > 55 ° C or б ≥ 80% | Hot spot temperature > 80 ° C or б ≥ 95% | Check fuse |
Fuse holder | The fuse holder is the hottest thermal image | Poor contact between fuse and fuse holder | The temperature difference does not exceed 10K, and the requirements for important defects are not met. | Hot spot temperature > 55 ° C or б ≥ 80% | Hot spot temperature > 80 ° C or б ≥ 95% | Check fuse | |
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