Testing Capacitor-How To Test A Capacitor When Breakdown Under Load
Have you ever come across power problem where once
you switch on the power supply and the fuse blow? You
have checked all the components in the power (primary)
and secondary section and all the components seems to be
ok,
louboutin chaussure pas cher! Where is the fault? A fuse blown are usually caused
by a shorted bridge rectifier, defective posistor, power
transistor or FET, shorted primary winding of switch mode
power tranformer,
louboutin pas cher, shorted secondary diode and etc. But
in this article i'm gone to show you another secret of
electronic troubleshooting tips.I got frustrated as to where is the cause of power problem.
Everytime when i switch on the power supply the fuse blow
immediately (the fuse became dark color and this indicate
that there is a major short circuit in the power supply).
I have checked all the components in the power supply and
can't find the culprit! What i do is i desoldered all the
suspected parts one by one and replaced with a known good
component. I eventually found the caused of the power supply
problem. Guess what? It was the main filter capacitor
(220 microfarad 400 volt). After replacing the filter cap
the power supply worked perfectly fine. I begin my detective
work to find out why this capacitor can caused the fuse to
blow eventhough i already confirmed it ok with my meters.The meters that i used to check the filter cap were analog
meter,
polo ralph lauren pas cher, digital capacitance meter and esr meter. In this
article i will not explain about how to check capacitor or
testing capacitor and how capacitor work.
I believed most of you know how to check capacitors and also
generally using this type of meters. Measured with analog it
showed capacitor charging and discharge,
franklin and marshall, with digital
capacitor tester it showed around 220 microfarad and with
esr meter it showed low esr reading,
moncler!This proved that the bad capacitor breakdown when under
full operating voltage. Then, how do i confirm that this
filter capacitor is faulty? By using an analog insulation
tester. When i connect the faulty cap to the meter and press
the go button-it showed a very low resistance and this is the
proved of short circuit between the plate when voltage applied!
There is nothing to do with bad electrolyte.
A good capacitor will just showed a charge and discharge in the
insulation meter just like you are checking a capacitor using
analog multimeter. In the market there is quite a number of
ranges that you can buy. It has the range of 50v, 100v,
franklin et marshall, 250v,
500v, 1000v and even 5000v! If you want to test a capacitor
of 100 microfarad 160v then you have to select 100v. If you
select 250v, it will blow your capacitor that is under test.If you have the SENCORE TEST EQUIPMENT such as the
sencore lc meter LC102 OR LC103,
doudoune moncler pas cher, these meters have the
capabilities of checking any type of capacitors with four tests:
-testing for capacitor values
-checking for leakage
-equivalent series resistance (ESR) and
-Dielectric absorptionIt can check aluminum electrolytic capacitor,
ralph lauren pas cher, film capacitor,
ceramic, high voltage capacitor and etc.Conclusion-Different capacitor manufacturer produced different type of quality of a capacitor. Perhaps the bad capacitor that I
encountered are from the lowest grade one.
A capacitor failure when under load is very rare.
Using ESR capacitor meter alone can solve
most of the electrolytic capacitor problem.Jestine Yong is a electronic repairer and a writer. For more electronic repair information please visit his website at http://www.noahtec.com/electronic-repair-articles.htm
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