From: micha...@acbcert.com
Sent: Thursday, November 21, 2019 11:24 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Question on 15.407 spurious emissions testing method
enforcement
Hi Charles, I hope you are well.
When performing your 15.109 emissions (part 15 subpart B) on the digital
Dear all
Thank you for your valuable feedbacks. I have now enough arguments for customer.
Best regards
Bostjan
From: Richard Nute
Sent: Tuesday, November 26, 2019 6:41:05 AM
To: 'Boštjan Glavič' ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] HV relay
Dear
Dear Boštjan:
As you know, a relay, including a vacuum relay, has two circuits. One is
the coil that controls the contacts. The other is the contacts. Usually,
these are separate circuits. If the one of the circuits provides a
safeguard function, then the two circuits must meet
Sorry, typo should be IEC 60664-1.
Doug
On Mon, Nov 25, 2019 at 9:07 AM Doug Powell wrote:
> BOštjan
>
> In the past when I've had to deal with this, I explained to the safety
> inspector that internal spacings (clearance and creepage) are not
> applicable. Nearly all IEC based standards use
BOštjanIn the past when I've had to deal with this, I explained to the safety inspector that internal spacings (clearance and creepage) are not applicable. Nearly all IEC based standards use IEC 60644-1 as the basis of their spacings determination. Since there is no atmosphere inside a vacuum
Hi Boštjan,
I've worked with this type of relay in the past. Distance between contacts
in the vacuum is unlikely to meet standard clearance requirements if you
are relying on the contact gap for safety isolation. Presumably the reason
for the vacuum in the first place is to provide very low
Dear experts,
Is anyone familiar with requirements for HV relay in vacuum? Are clearances and
creepage distances between contacts applicable for such relay?
Thank you for your support.
Best regards,
BOštjan
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