The 500 VA requirement is of importance if read as a 200 mA at 2500 Volts . When you are testing equipment with line to ground capacitors of Y quality, there will flow a very much increased leakage current. If a standard filter leaks 3.5 mA at 250 Volts it will leak 35 mA at 2500 Volts. Therefore the 40 mA that the quadcheck delivers ( if I remember well) is just sufficient for testing with these filters ( although not compliant) You may however not detect smaller leakage as it is hidden by this big current. In that case you would have to add a DC test, or disconnect the filter. The reason for the 200 mA was to make a leak detectable (noise) and to enable the leak to deliver enough power to make a starting leakage really fail (because the power that develops into it) . This makes compliant testing a somewhat hazardous test, take care for your body (eyes) and in insurance :<),
== Ce-test, Qualified testing == Consultants in EMC, Electrical safety and Telecommunication Compliance tests for European standards and ce-marking Member of NEC/IEC voting committee for EMC. Our Web presence: http://www.cetest.nl List of current harmonized standards http://www.cetest.nl/emc-harm.htm 15 great tips for the EMC-designer http://www.cetest.nl/features01.htm Support the International Red Cross Million 2000 Lottery: http://www.pluslotto.com/default.asp?urlref=3300008136443 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nicholas, Keith L Sent: vrijdag 19 juni 1998 13:57 To: [email protected] Subject: Highpot testing We are preparing to purchase several Associated Research Quadcheck II, highpot, ground bond, and insulation resistance testers. I've run across an issue pertaining to a 500 VA requirement for highpot in EN 60204, which this "All-in-one" tester is not capable of producing. According to the manufacturer, the instrument shortcomings, as they pertain to 500VA, have been eliminated as a result of microprocessor controlled power supplies. I believe this unit only produces upwards of 300 VA. The cost of this unit is reasonable and it is very friendly to operate in a production environment. (no I'm not a distributor or sales person for this product). My questions: Should I purchase this unit, test our products, and hope the 500VA requirement in 60204 will change in the future due to the advancements in these testers? (we are self certifying our equipment to the Machinery Directive) or Should I find a unit that performs the test at 500 VA? Thanks in advance....
