Re: [PSES] EN 62368-1 query

2015-10-29 Thread Mick Maytum
On 26-Oct-15 6:29 PM, Scott Aldous wrote: _Table 5 (Capacitor Energy)_ For the energy from a capacitor, the table takes into account capacitance and voltage, so both need to be taken into account since the equation for available energy from a capacitor includes both variables. This is

Re: [PSES] EN 62368-1 query

2015-10-26 Thread Richard Nute
Hi Ron: >But, a capacitor charged to such an open-circuit voltage need to also be rated for that voltage (probably a DUH moment). Correct? Yes. >Is Table 2 of IEC 61201:1992 equivalent to Table A.2 of IEC 61201:2007? Yes. >ECMA 287 Table 3.4 ES1 values decrease from 60

Re: [PSES] EN 62368-1 query

2015-10-26 Thread Richard Nute
Hi Ron: The values in Table 5 are taken, directly, from IEC 61201, Table A.2 and Figure A.1 (notes 1 and 2). See Annex A, IEC 61201, for further information about these values. Upeak is not the correct term; the voltage is the open-circuit voltage to which the capacitor is charged.

Re: [PSES] EN 62368-1 query

2015-10-26 Thread Ronald Pickard
ES] EN 62368-1 query Hi Ron: The values in Table 5 are taken, directly, from IEC 61201, Table A.2 and Figure A.1 (notes 1 and 2). See Annex A, IEC 61201, for further information about these values. Upeak is not the correct term; the voltage is the open-circuit voltage to which the cap

Re: [PSES] EN 62368-1 query

2015-10-26 Thread Ronald Pickard
3:58 PM To: Ronald Pickard <ronald.pick...@compoundphotonics.com>; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] EN 62368-1 query Hi Ron: >But, a capacitor charged to such an open-circuit voltage need to also be rated >for that voltage (probably a DUH moment). Correct? Yes.

[PSES] EN 62368-1 query

2015-10-26 Thread Ronald Pickard
For all those more familiar than I with this standard, I would appreciate a clarification. I've just purchased EN 62368-1 (assuming IEC 62368-1, too) and have started immersing myself in it, but in 5.2.2.3 (Table 5) ES1/ES2 voltage limits from a charged capacitor appear to violate the ES1/ES2

Re: [PSES] EN 62368-1 query

2015-10-26 Thread Scott Aldous
Hi Ronald, It may be helpful for you to purchase a copy of 62368-2, which has the rationale for the requirements in 62368-1. Others can provide more detail and probably explain better than I, but in general Table 4 has voltage *or* current limits, and Table 5 has capacitance *and* voltage