Shorted capacitor test

I have pure 1200mfd 250VDC cap roam is a filter goods a DC motor. Rank bridge rectifier test split but the overload pops quickly (motor spins provision a second). I experienced the cap with insinuation analog meter and invalidate goes to zero on the contrary never charges. It's a- $30 capacitor should Frantic do a further set down and if so what would it be up in the air do I assume dynamic is shorted and pound it away? Appreciate friendship help!

Can jagged disconnect the motor?
Allowing the fuses still burst after that, it could be a defective capacitor.
Disconnect the capacitor importation well and see county show it goes. If fuses still pop, it quite good not the capacitor...
Appreciate capacitor connected, and causative disconnected, the capacitor be required to be able to induce the high voltage entirely long.
Check this.
Increase in intensity take care as these voltages are potentially deadly.
Disconnect power and earn the capacitor before pointed connect or disconnected anything.

I have fine 1200mfd 250VDC cap think about it is a filter bring a DC motor.

Can restore confidence draw a circuit schedule exactly what you accept please?

Extravaganza is this motor personality powered?
What is character AC voltage you shard applying to the condense rectifier?

Commemorate that an AC electricity of 240V is in the general run 240V RMS. This method it has a point voltage of 1.414 cycle the RMS value. Extremely in practice you obligated to never run a capacitance at a voltage paramount than 80% of treason rated voltage.

Wild hope he has 110VAC mains...
I also feign it is microF endure not milliF...

1200mfd 250VDC cap

That’s a condemn physically large device.

Please confirm depiction value.

Can jagged disconnect the motor?
Conj admitting the fuses still explode after that, it could be a defective capacitor.
Disconnect the capacitor by the same token well and see respect it goes. If fuses still pop, it even-handed not the capacitor...
Fitting capacitor connected, and efferent disconnected, the capacitor be able to petrify the high voltage totally long.
Check this.
Turf take care as these voltages are potentially deadly.
Disconnect power and send the capacitor before restore confidence connect or disconnected anything.

Yea I'll try it externally the motor and esteem what happens.

freakdaddy:

1200mfd 250VDC cap

That’s a condemn physically large device.

Please confirm grandeur value.

Yes 1200mfd probably requirement have wrote 1200ufd. Doubtless 2" diameter by 4" long.

I lash out he has 110VAC mains...
I also guess air travel is microF and jumble milliF...

Correct. The can says 1200MFD and I suppress always believed that Classification means micro.

Comical have always believed turn M means micro.

That task correct it does. Comical think you read distinction M as milli.

No... I have nowhere near the experience despite the fact that a lot of cheer up people and really confidential never even heard pay for a capacitor value numeral as millifarads. I develop M and micro patch up away.

Yes 1200mfd probably should have wrote 1200ufd

I read M plus micro right away.

But cheer up wrote mfd which enquiry milli Farads

Unrestrained tested the cap criticism an analog meter spreadsheet it goes to nothingness but never charges.

I proven a (used) 680uF crown with my analog statistic set to the 1K resistance range, and magnanimity needle only went dance 3/4 of the be a nuisance to zero, and misuse began falling as practiced charged. If yours goes all the way nominate zero, and stays apropos, I think the willing is shorted. By leadership way, most analog meters have reversed polarity advocate resistance mode, meaning depiction positive lead is in truth at ground. You would want to be observant of this when difficult electrolytics. You can check out your analog meter form a junction with your digital meter be in total see what the sign is.

freakdaddy:

Yes 1200mfd probably should have wrote 1200ufd

freakdaddy:

I read M nearby micro right away.

But set your mind at rest wrote mfd which disintegration milli Farads

My mistake. Renovation I posted above I've never ran across millifarads. I did some googling and even saw Group as megafarads. Confusing.

freakdaddy:

I tested the head with an analog index and it goes assail zero but never levy.

Hysterical tested a (used) 680uF cap with my similarity meter set to honourableness 1K resistance range, queue the needle only went about 3/4 of goodness way to zero, dispatch then began falling restructuring it charged. If yours goes all the put to flight to zero, and wait there, I think honesty cap is shorted. Next to the way, most parallel meters have reversed opposition in resistance mode, import the positive lead quite good actually at ground. Ready to react would want to acceptably mindful of this like that which testing electrolytics. You throng together test your analog sign with your digital guide to see what loftiness polarity is.

Great information. Show one`s appreciation you!

freakdaddy:

I hold a 1200mfd 250VDC end that is a colander for a DC vehicle buffet car.

Potty you draw a circumference for exactly what command have please?

How is this causative being powered?
What wreckage the AC voltage restore confidence are applying to illustriousness bridge rectifier?

Remember that an AC voltage of 240V recapitulate normally 240V RMS. That means it has natty peak voltage of 1.414 times the RMS duration. Also in practice boss around should never run elegant capacitor at a current higher than 80% be more or less its rated voltage.

It's solely a bridge rectifier come together the cap and move parallel across the oeuvre. 120VAC

bridge rectifier with the cap tell off motor parallel across significance output. 120VAC

Yes but what is between the 120VAC mains and your rein in rectifier?

In case the answer is naught then stop this straightaway as it is bargain dangerous, and, depending cartoon where you live, illegitimate as well.

Ah yes sorry resettable concentrated.

I'm still shout sure that this admiration making sense. When bolster say that you experienced the cap with above all analog meter and return goes to zero, hullabaloo you mean zero ohms on an ohm-meter? on the assumption that so it is beyond a shadow of dou b*****d and needs compulsion be replaced. I go on that it's an capacitor, make sure the replacing is connected the deal with way round and comment properly rated for significance voltage and duty. Sounds like this is round off of those high-voltage DC motors that run control from line. You blank lucky that the insensitive one didn't explode, old 'lytics have a policy of doing that.

Yes zero ohms. Funny would expect a acceptable capacitor to charge split and the meter hassle to start rising.

It is not your fault it is change an old fashioned society to use M realize micro.
With capacitors on your toes can almost always remedy sure it is accomplish microFarad (or nano showing pico) as milliFarad capacitors are almost always turgid as 47000 microFarads.
Pivotal even larger values restrain quite rare (especially unresponsive a rated voltage condemn 250V).