Testing Capacitor – How To Test A Capacitor When Breakdown Under Load
Have you ever come across power difficulty in which when you swap to the insulation tester provide and also the fuse blow? You may have checked each of the parts inside the power (main) and secondary segment and every one of the elements appears to be okay! In which could be the fault? A fuse blown are frequently brought on by a shorted bridge rectifier, defective posistor, power transistor or FET, shorted main winding of switch mode power transformer, shorted secondary diode and and so on. But on this write-up I’m gone to display you yet another secret of electronic troubleshooting tips.
I obtained frustrated as to where is a cause of power issue. Each and every time when i change around the electrical power provide the fuse blow immediately (the fuse grew to become dark color and this indicate that there is a significant short circuit from the electrical power provide). I have checked all of the elements within the energy provide and can’t locate the culprit! What i do is i desoldered each of the suspected components a single by one particular and changed which includes a recognized excellent element. I eventually located the triggered in the electrical power supply problem. Guess what? It was the primary filter capacitor (220 microfarad 400 volt). Immediately after replacing the filter cap the energy provide labored properly fine. I get started my detective do the job to seek out out why this capacitor can caused the fuse to blow even though i by now confirmed it ok with my meters.
The meters that i applied to check the filter cap had been analog meter, digital capacitance meter and esr meter. Within this report i will never reveal about how to examine capacitor or testing capacitor and how capacitor operate. I thought the majority of you recognize the best way to check capacitors as well as generally working with this type of meters. Measured with analog it showed capacitor charging and megger pat tester with digital capacitor tester it showed about 220 microfarad and with esr meter it showed reduced esr reading through!
This proved that the bad capacitor breakdown when beneath complete operating voltage. Then, how do i confirm that this filter rcd tester capacitor is faulty? By utilizing an analog insulation tester. When i connect the faulty cap to the meter and press the go button-it showed a very reduced resistance and this is certainly the proved of short circuit concerning the plate when voltage applied! There is absolutely nothing to perform with undesirable electrolyte.