|
许多标准都提到等电位保护连接导体测试(protective bonding test)时,测试电流值应该为设备过电流保护设备额定值的2倍。* C, w9 m* m* ?: a& o; U
为什么是2倍?还请高人指点。。。。谢谢!!, |- O# ^7 O7 d: n, v1 c
8 f7 ~4 s- P1 Q5 q
如下摘自IEC60950-1:2005
4 A Q: O0 J5 o* {, wThe test current, duration of the test and test results are as follows:4 R K) s; ~3 s
a) For equipment powered from a MAINS SUPPLY, if the PROTECTIVE CURRENT RATING of the circuit under test (see 2.6.3.3) is 16 A or less, the test current is 200 % of the PROTECTIVE CURRENT RATING applied for 120 s. The resistance of the PROTECTIVE BONDING CONDUCTOR, calculated from the voltage drop, shall not exceed 0,1 Ω . After the test, the PROTECTIVE BONDING CONDUCTOR shall not be damaged.$ ]" s1 y- N/ T9 `
b) For equipment powered from an AC MAINS SUPPLY, if the PROTECTIVE CURRENT RATING of the circuit under test exceeds 16 A, the test current is 200 % of the PROTECTIVE CURRENT RATING and the duration of the test is as shown in Table 2E.7 y! P8 U0 h* T* J
|
|