How to check the condition of power distribution cabinet compensation capacitors
2019-09-05
During a recent workshop inspection, I discovered bulging capacitors and melted wiring in the workshop compensation cabinet. This led to a special inspection of the capacitors. Because many distribution cabinets and capacitors are involved, and replacement times vary, it's impossible to replace everything at once. This requires a check of each capacitor in the cabinet. Some obviously need replacing, while others are more hidden and require testing. Therefore, I'm sharing some capacitor testing methods here. First, the simplest method is visual inspection. Common issues include bulging or burst capacitors, which are clearly faulty and require no further explanation. Second, for capacitors with replacement records, check the previous replacement records. Capacitors also have a service life. Although the lifespan of each capacitor varies, units with the resources should replace all capacitors when their service life expires. Generally, the service life of a capacitor is around five years, which is also the replacement deadline. Even if there are no apparent problems after that, performance will have already degraded.
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