Re: [PSES] Purchase Mains Input Filters

[Wan Juang FOO (NP)]

Official (Closed) - Non Sensitive

What are your current ratings?

Can consider Schaffner FN9222SR-1-06 Mains Filter IEC Input Socket 250VAC 1A

Tim Foo

From: David Nyffenegger 
Sent: Wednesday, 22 January 2020 4:35 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Purchase Mains Input Filters

We use a lot of Corcom and Schaffner.
-Dave

On Tue, Jan 21, 2020 at 2:24 PM Amund Westin 
mailto:am...@westin-emission.no>> wrote:
Any advice where to go when purchasing mains AC input filters? (for conducted 
emission purpose)

BR
Amund

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Re: [PSES] Observation Period during Flicker Emissions Test

[Wan Juang FOO (NP)]

I have a maxim, do the EMC Test according to the standard, if it passed, do not 
test again.

Tim Foo

From: Brian Kunde 
Sent: Friday, June 28, 2019 9:24 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Observation Period during Flicker Emissions Test

Reference IEC/EN 61000-3-3:2013 section 6.5 regarding Observation Period. The 
Electrical Equipment (EE) under test is NOT listed in Annex A.

We are trying to make sure we are testing a product correctly. Your help would 
be greatly appreciated.

The EE has a cycle time of about 15 to 20 minutes.  Since the cycle time is 
greater than 10 minutes, it is my understanding that the cycle is NOT repeated 
to determine the Plt.  So would it be correct to start up a 2-hour test, run 
the EE through a single cycle and then just let the EE run in standby mode for 
the remainder of the 2-hour test?



Here is our situation.  We have an EE under test that passes the 10 minute Pst 
limit with a value around 0.8 (1 is the limit).  If we repeat the operational 
cycle over and over again during the 2-hour test, we again will get a Plt value 
of about 0.8 (limit is 0.65) and Fail.  But if we run the cycle only once and 
then let the EE sit in standby mode for the remainder of the 2-hour test, the 
Plt will creep down below 0.65 and pass the test.

Again, we want to make sure we are performing the test correctly according to 
the standard.

Thanks to all for help on this.

The Other Brian
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