|
结合标准的测试线路图按下面意思做呗 Connect a knife-switch(s) across the protective device(s) in the circuit. Protective devices include fuses, thermal protectors, and dedicated protection circuits. For each set of test points specified below, determine if 50 Watts or more power is available after 1 minute. Make this determination as follows: Connect a wattmeter and an adjustable resistive load across the capacitor or semiconductor junction under test. The load resistor should be capable of handling at least 50 Watts and should be set for its maximum resistance at the start of the 'test'. Close the knife switch on the protective device in the circuit. Then adjust the load resistor to cause a power dissipation of exactly 50 Watts as indicated by the meter. Open the knife switch across the protective device. If the protective device functions within 1 minute to reduce available power to less than 50 Watts, the point under test is considered not capable of delivering 50 Watts for one minute. Similarly, if a circuit component or components, open in less than 1 minute, or current is inherently limited to keep power below 50 Watts, the test point is considered as not capable of delivering 50 Watts for 1 minute. | 
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2014-3-10 09:17
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
楼主
