[PSES] Scientific principles behind Surface Creepage & Air Clearance

2017-05-09 Thread Vincent Lee
Hi all, Good day, 1) May I know what is the scientific relationship between Paschen's Law (https://en.wikipedia.org/wiki/Paschen%27s_law) and surface creepage and air clearance distance ? 2) If there is a relationship, how can one calculate the surface creepage and air clearance distance (suc

[PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

2017-05-09 Thread Vincent Lee
Hi all, Good day, Does anyone know where can we get a Surface Creepage & Air Clearance Calculator based on IEC 60601-1 3.1ed ? I was told that surface creepage and air clearance distance stated in IEC 60950-1 2ed is used as Mean of Operator Protection (MOOP) while those stated in IEC 60601-1 2ed

Re: [PSES] EN55032 host equipment...

2017-05-09 Thread ce-test, qualified testing bv - Gert Gremmen
About this clause D: Annex D Arrangement of EUT, local AE and associated cabling ... Arrangements such as placing AE below the RGP or placing AE outside the measurement area when it is normally located distant from the EUT may be used to limit the effects of adverse AE emissions or to reduce mea

Re: [PSES] EN55032 host equipment...

2017-05-09 Thread T.Sato
On Mon, 8 May 2017 22:32:38 +, Matthew Wilson wrote: > In regards testing, for example's sake, a printer with a RS232 serial port > under EN55032 for EMC, where does the host 'laptop' PC to generate the RS232 > signals (most likely via a USB-RS232 adapter from the laptop's USB port) get

Re: [PSES] EN55032 host equipment...

2017-05-09 Thread ce-test, qualified testing bv - Gert Gremmen
Matthew, Adding a filtered SUBD-9 connector in the septum of your shielded room (or 2 filtered connectors in series ) allows you to route RS232 cable out of the room, and connect it to any suitable interface. Route the EUT RS232 cable to the centre of your turn table and along the floor to the