Capacitor group infrared temperature measurement

December 10, 2020

I. Management regulations

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
Equipment category and location		Thermal image feature	Fault characteristics	General defect	Serious flaws	Critical defect	Handling suggestions
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
Capacitor	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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