Testing Capacitor – How To Test A Capacitor When Breakdown Under Load
Have you ever encounter strength problem where as soon as you switch at the energy supply and the fuse blow? You have checked all the additives within the electricity (primary) and secondary segment and all the components seem to be good enough! Where is the fault? A fuse blown are usually as a result of a shorted bridge rectifier, faulty posistor, strength transistor or FET, shorted number one winding of switch-mode energy transformer, shorted secondary diode, and many others. But in this article, I’m gone to show you every other mystery of digital troubleshooting guidelines.
I got annoyed as to where is the purpose of strength hassle. Every time whilst I turn on the electricity supply the fuse blow at once (the fuse became darkish coloration and this indicates that there is a major quick circuit within the strength supply). I have checked all of the additives within the power delivery and cannot find the culprit! What I do is I desoldered all of the suspected elements one at a time and changed with a known true thing. I, in the end, observed the triggered of the energy delivery hassle. Guess what? It becomes the main filter capacitor (220 microfarad four hundred volts). After replacing the filter cap the energy supply worked flawlessly first-class. I begin my detective work to discover why this capacitor can be brought about the fuse to blow despite the fact that I already showed it OK with my meters.
The meters that I used to test the clear out cap had been analog meter, digital capacitance meter, and ESR meter. In this newsletter, I’m able to not give an explanation for approximately how to check a capacitor or trying out the capacitor and the way capacitor works. I believed most of you know how to test UX FOB capacitors and also normally using this form of meters. Measured with analog it confirmed capacitor charging and discharge, with digital capacitor tester it showed around 220 microfarads and with ESR meter, it showed low ESR reading!
This proved that the horrific capacitor breakdown whilst below complete running voltage. Then, how do I verify that this filter out capacitor is defective? By the use of an analog insulation tester. When I connect the defective cap to the meter and press the go button-it showed a very low resistance and that is the proved of short circuit among the plate while voltage implemented! There is not anything to do with bad electrolyte. A properly capacitor will simply show a charge and discharge in the insulation meter similar to you’re checking a capacitor the usage of an analog multimeter. In the marketplace, there may be quite some of the levels that you can buy. It has the range of 50v, 100v, 250v, 500v, 1000v or even 5000v! If you want to test a capacitor of 100 microfarad 160v then you have to select 100v. If you choose 250v, it will blow your capacitor this is under check.
If you have the SENCORE TEST EQUIPMENT along with the score lc meter LC102 OR LC103, those meters have the capabilities of checking any form of capacitors with 4 assessments:
-trying out for capacitor values
-checking for leakage
-equivalent series resistance (ESR) and
It can take a look at the aluminum electrolytic capacitor, movie capacitor, ceramic, high voltage capacitor, and many others.
Conclusion-Different capacitor manufacturer produced a one-of-a-kind type of exceptional of a capacitor. Perhaps the bad capacitor that I encountered is from the lowest grade one. A capacitor failure whilst under load is very rare. Using ESR capacitor meter alone can clear up most of the electrolytic capacitor trouble.