Author Topic: Power filter testing  (Read 845 times)

0 Members and 1 Guest are viewing this topic.

Offline FrankT

  • Regular Contributor
  • *
  • Posts: 154
  • Country: au
Power filter testing
« on: May 26, 2017, 06:04:10 am »
At least I think it's a power noise filter.

The coffee machine at work has stopped  :scared:.  It doesn't power up.  I can measure 240VAC going into the filter, but only about 80-90v AC coming out.

It is this device...

http://www.ebay.com/itm/Kondensator-Capacitor-Entstorfilter-F55-047-406-Saeco-Crema-Incanto-Magic-Royal-/300886391803

Does the low voltage indicate a problem, or is that ok when not under load?

 

Offline bktemp

  • Super Contributor
  • ***
  • Posts: 1623
  • Country: de
Re: Power filter testing
« Reply #1 on: May 26, 2017, 06:13:25 am »
It is a typical mains input filter consisting of a common mode choke and some capacitors.
The resistance between input and output should be very low, between the input or output terminals it should be around 680k because of the built in discharge resistor.
If the resistance between input and output is much higher, the common mode choke is probably damaged (overheated because of too much current?).
 

Offline FrankT

  • Regular Contributor
  • *
  • Posts: 154
  • Country: au
Re: Power filter testing
« Reply #2 on: May 26, 2017, 08:22:52 am »
Thank you for the detailed reply.

I measured terminals and they matched everything you said they would be :(

It turns out the wire end that I was measuring also had the power switch and a micro switch in series.  It turns out the power switch has died. (480k when closed)

A big thank you from everyone in the office; I will be safe working environment again when the caffeine starts flow!
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf