|
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。7 p' q0 I8 J+ R
为什么是2倍?还请高人指点。。。。谢谢!!6 {' {: T3 q; c7 g- L
* |' @' |/ U; O9 O# \2 M
如下摘自IEC60950-1:2005
/ Z: m3 n: B9 pThe test current, duration of the test and test results are as follows:& ?- R3 r# V9 u7 C8 G% v5 C
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.
# r0 T0 ?( [4 ^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.
6 V9 q- z- ~/ [1 I S. O |
|