PFC on 150w mains to DC switcher

I have selecting a 150w universal input (110-240 VAC nom) four rail switcher for use in a product (digital audio workstation) to be shipped to USA, Japan, Europe etc. The supply has a CE mark. I notice, however, that there is no PFC stage, and no mention of PFC in the supply data sheet. I though

RE: TTE and TNE

Both types of equipment fall under the Low Voltage and EMC Directives. The RTTE Directive (Radio and Telecommunications Terminal Equipment) applies only to Termnial equipment. Network equipment has its own EMC Standards EN 300-386 series) and presumably safety as well. As to network requirement

RE: TTE and TNE

Compliance to the RTTE is required and it references the essential requirements of the EMC and LV Directives and new ones specific to the RTTE. Compliance with the essential requirements of the EMC and LV Directives can be demonstrated by following those directives and harmonized standards. Some b

TTE and TNE

Does Telephone Terminal Equipment and Telephone Network Equipment fall under the R&TTE Directive? If not, what Directive do they belong to? EMC? Low Voltage? What set of standards apply (or is this question too vague)? Thanks, Bob Heller 3M Company --- Th

RE: Surge to 4Kv

You're right, Gary. ITU K.20 (I believe) specifies testing of telecom ports connected to the network. The test levels are 1.5kV if primary protection is present, 4.0 kV if not. The waveform is 10 x 700. CISPR 24 actually references these test levels in Table 2.. One of the European common mod

RE: Shielded Room

Hi Jim, Try http://www.emctest.com/ The standards will depend on what needs to be tested in the room as the field strengths, absorber materials, types of antennae and physical size if the EUT all have a part to play. Regards - Chris Chileshe - Ultronics Ltd - Cheltenham, UK -Original Me

EN 61000-6-2

Shaike, My thoughts on Immunity standards. I feel that considering why the exemptions are given is useful. For DC powered units we are worried about pick up of disturbance on the DC cables or injection of disturbances from the AC supply. Radio Frequency disturbances are considered most likely t

RE: Compliance Documentation

Chris, Acrobat is very good. In addition to virtues already mentioned by others you can electronically "sign" PDF documents. Acrobat also has a Paper Capture function which runs an OCR on scanned text, converting it back into text which you can cut'n'paste back to other documents in Word etc. Th

Spacings from Shielded Enclosure to Floating GND

Dear All, Just wondering if there is a rule of thumb for creepages/clearances for ESD/or other emc requirements between a shielded enclosure and the digital or analog GND (floating) on a backplane. Thanks Peter Merguerian Managing Director Product Testing Division I.T.L. (Product Testing) Ltd.

RE: 61326-1

Brian I would recommend you get a copy of the standard including the 1999 amendment. It has a lot of good stuff in it including allowing you to chose the pass/Fail criteria on the immunity testing. Also a lot of the pass levels have been relaxed compared to the old general ISM Standards B

RE: Hipot test AC v DC

Hi Peter, Check out the attached web site. Good Info. Praveen -Original Message- From: peterh...@aol.com [mailto:peterh...@aol.com] Sent: Monday, 12 February 2001 5:35 PM To: emc-p...@majordomo.ieee.org Subject: Hipot test AC v DC Hello group, Could someone explain the followings