Hi, I would like to get your opinion on the test conditions applicable for sections 2.7 and 5.3, primarily for short circuit test. Let's assume it is direct plug-in equipment/AC-DC power adapter. What will be most appropriate power source requirement for performing s.c. test for UK ring? I can find the source which can go as high as 900A while shorted on the primary side and can adjust the phase (which we found at 0 degrees it has the highest effect). Assuming product is going to relay on building installation for backup protection. I would like to get opinions and examples on what would be considered optimum and worst case scenarios. Do you think it is reasonable to expect lab in China or US could adequately represent real life conditions let's say of the power ring in UK? We observed failures just by plugging in short circuited equipment in the standard outlet which could not be reproduced in the lab. what is the common practice for abnormal testing for ultrasoncly welded adapters? do you cut a window then reaseal it, do you test just open PCB? what is the typical circuit breaker in UK? 32A? does every outlet has build in 13A fuse? Last but not the least question: could you please recommend reliable brand name 60950 Safety Lab in UK? (would not hurt if near London)? Thanks a lot for any advise Mark Gandler
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