Thanks for your reply. I do not understand why the order of testing affects the basic nature of measuring and interpreting WV.
I cannot extract an unambiguous definition of, and measurement requirements for, WV (aka, U). Table 16, and the clause (57.10) preceding the table refers to 20.3: "The value of the reference V is as given in Sub-Clause 20.3." And 20.3 states "The reference voltage (U)...is the voltage to which the relevant insulation is subjected... The top (2) rows of table 16 allows for use of a reference V that is ac, defined as true rms, or DC. So how do I account for repetitive Vpk that is significantly higher than the rms or dc (and yes, I have verified my rms measurements with several instruments using thermal and hi-integration converters). Brian -----Original Message----- From: Mantunes [ mailto:[email protected]] Sent: Thursday, August 14, 2003 8:54 AM To: [email protected] Subject: IEC 60601-1 Table 16 Hi Brian The reference voltages to clearance and creepage are the same as the ones used in the dielectric strenght test of subclause 20 (showed on the second column of table 16, tests A-a1 to B-e). If the sequence of testing in appendix C is used, the dielectric strenght tests are made before subclause 59 on constructional requirements, so you´ll already have the reference voltages (AC or DC depends on the voltage stressing the insulation being tested). Both clearance and creepage use the same reference voltage, which is usually the highst voltage stressing the insulation. --------- Mensagem Original -------- De: "Brian O'Connell" <[email protected]> Para: "'[email protected]'" <[email protected]> Assunto: IE C60601-1 table 16 Data: 13/08/03 22:56 Good People Would someone please provide relevant clause that explains how to use this table. Are the peak/dc and rms WV used seperately to determine clearance & creepage, as in 60950? or is the greater of the dc or ac WV used to determine both crp & clr ? Is the same measurement technique for determining WV as in 60950, 1010-1, etc ? thanks much Brian
