Re: EMC and Class 2 equipment

2002-04-29 Thread Rich Nute
Hi John: Now we have sub-classes Y1 to Y4. Y capacitors can be used in locations where neither side is grounded, but in the OP's context, grounding is involved. What are the definitions of the various Y capacitors in the most edition of IEC 384? OP? A Y-cap can be used

Re: EMC and Class 2 equipment

2002-04-27 Thread John Woodgate
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in 200204262205.paa10...@epgc264.sdd.hp.com) about 'EMC and Class 2 equipment', on Fri, 26 Apr 2002: Hi John: Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation

Re: EMC and Class 2 equipment

2002-04-26 Thread Rich Nute
Hi John: Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation) power supply (shall comply with MIL-STD-461E) . I'm thinking on, what to do with the regularly Y-caps, does it really have any meaning with these

Re: EMC and Class 2 equipment

2002-04-26 Thread John Woodgate
I read in !emc-pstc that am...@westin-emission.no wrote (in LFENJLPMMJB mhpeibnilgedmceaa.am...@westin-emission.no) about 'EMC and Class 2 equipment', on Tue, 23 Apr 2002: Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation) power

Re: EMC and Class 2 equipment

2002-04-25 Thread Lou Aiken
: EMC and Class 2 equipment Hi all, Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation) power supply (shall comply with MIL-STD-461E) . I'm thinking on, what to do with the regularly Y-caps, does it really have any

Re: EMC and Class 2 equipment

2002-04-24 Thread Cortland Richmond
Amund I don't think of a green wire as RF ground. What are Y caps DOING? They are a return path for RF current that could otherwise get onto the mains and cause interference. How does RF current get onto the power conductors? Unbalanced switching noise? Yes, mostly. Capacitive coupling? Some.

Re: EMC and Class 2 equipment

2002-04-24 Thread Rich Nute
Hi Amund: Being a safety guy and not an emc guy... (disclaimer) Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation) power supply (shall comply with MIL-STD-461E) . I'm thinking on, what to do with the regularly

EMC and Class 2 equipment

2002-04-23 Thread amund
Hi all, Ground connections is usually nice to have when dealing with EMC. But what about EMC and a class 2 (double insulation) power supply (shall comply with MIL-STD-461E) . I'm thinking on, what to do with the regularly Y-caps, does it really have any meaning with these caps when ground