第一：安全距离规范 First: safety distance specification 　　下面所说的涉及安规的问题，只针对初、次级及高压，大电流区域PCB布板。 The following is a problem of the safety of the regulation, only for the initial, secondary and high pressure, the large current area PCB cloth board. 　　交流输入L-N，N-GND，L-GND间距必须大于3.5毫米;初级整流滤波电容正;负级间距须大于4毫米;初、次级间距须大于6毫米(光耦处间距最小);次级电路电压小于48V的区域布板时一般不作安全间距要求。 Communication input l-n, n-gnd, l-gnd spacing must be greater than 3.5mm. Primary rectifier filter capacitance; The negative spacing must be greater than 4mm. Primary and secondary spacing should be greater than 6mm (the minimum spacing of the optical coupling); When the secondary circuit voltage is less than 48V, it is generally not required for safety. 　　这里需要注意的是，电气的间隙与爬电距离应符合相关要求。 It is important to note that the gap between the electric and the electric distance should meet the requirements. 　　第二：耐压测试规范 Second, the gauge of pressure test 　　测试内容及标准 Test content and standards 　　输入–输出耐压测试及标准 Input - output tolerance test and standard 　　交流3000V，1分钟打耐压， 漏电流设为10mA。耐压仪指示漏电流<10mA， 且无飞弧现象为合格。 Ac 3000V, 1 minute resistance pressure, leakage current set to 10mA. The voltage meter indicates the leakage current < 10mA, and no flying arc phenomenon is qualified. 　　输入–大地耐压测试 Input - earth pressure test 　　交流1500V，1分钟打耐压， 漏电流设为10mA;耐压仪指示漏电流<10mA， 且无飞弧现象为合格。 Ac 1500V, 1 minute withstand voltage, leakage current set to 10mA; The voltage meter indicates the leakage current < 10mA, and no flying arc phenomenon is qualified. 　　输出–大地耐压测试 Output - earth pressure test 　　直流500V，1分钟打耐压， 漏电流设为10mA，耐压仪指示漏电流<10mA， 且无飞弧现象为合格。 Dc 500V, 1 minute resistance pressure, leakage current set to 10mA, voltage meter indicating leakage current < 10mA, and no flying arc phenomenon is qualified. 　　注：大地为外壳地.测试仪器为耐压测试仪。 Note: the earth is the crust field. The test instrument is a pressure tester.