Greetings All, For those who want to read the UL60950 Section 6.1.2.1, I have written the specific parts of the section that I have questions on. Otherwise, here are my questions and comments:
1) If the bridging components are left in place, do I still have to meet the 10 mA requirement? 2) If so, at which test voltage, the 1.5kV/1.0kV or EUT's rated voltage/range? The paragraph describing what to do if components are removed, implies that if the components are left in place, the 10 mA test is not performed, only that the components shall not be damaged. But the section describing the passing requiring requirements does not make that distinction. They are part of an 'and' condition. 3) If the 10 mA test is not required, when the bridging components are left in place, then what is the reasoning for having these components be able to exceed the 10 mA, when those components that had to be removed, be subject to the 10 mA max current? Thanks. Richard Georgerian Compliance Engineer Carrier Access Corporation 5395 Pearl Parkway Boulder, CO 80301 USA Tele: 303-218-5748 Fax: 303-218-5503 mailto:rgeorger...@carrieraccess.com ===================================================================== UL60950 Section 6.1.2.1 Separation of the telecommunication network from earth, Requirements Insulation is subjected to an electric strength test according to 5.2.2. The a.c test voltage is as follows: - for equipment intended to be installed in an area where the nominal ac mains supply voltage exceeds 130 V: 1.5 kV - for all other equipment: 1.0 kV The test voltages apply whether or not the equipment is powered from the ac mains supply. It is permitted to remove components that bridge the insulation, other than capacitors, during electric strength testing. If this option is chosen, an additional test with a test circuit according to figure 6A is performed with all components in place. The test is performed with a voltage equal to the rated voltage of the equipment or the upper voltage of the rated voltage range. During these tests: - there shall be no breakdown of insulation during electric strength testing; and - components bridging the insulation that are left in place during electric strength testing shall not be damaged; and - the current flowing in the test circuit of figure 6A shall not exceed 10 mA ===================================================================== ************************************************************************* This e-mail transmission, and any documents, files, or previous e-mail messages attached to it may contain information that is confidential or legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that you must not read this transmission and that any disclosure, copying, printing, distribution, or use of any of the information contained in or attached to this transmission is strictly prohibited. If you have received this transmission in error, please immediately notify the sender by telephone or return e-mail and delete the original transmission and its attachments without reading or saving them in any manner. Thank you. *************************************************************************
