|
|
1.如图所示,IEC60950 FIGURE 5中的测量网络,中间连接L,N,PE的黑线是什么意思?如果是导线,不久将L,N,PE连接起来了吗?这样测量又有何意义呢?6 o. s! z5 I' E$ A1 E( T( f; k% R
2.在接下来的5.1.5中标准中的两句话:
0 ^- g& o5 t) V% D For equipment having a protective earthing connection or a FUNCTIONAL EARTHING connection,terminal A of the measuring instrument is connected via measurement switch "s" to the main8 R, U9 R8 x3 i; D9 K' V# t; O# Y+ _% S c
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.. |$ L! _' l8 ~9 K6 [; `
The test is also conducted, on all equipment, with terminal A of the measuring network$ S% U( o. T- I4 g! J" a$ P
connected via measurement switch "s" to each unearthed or non-conductive accessible part
/ u$ Y6 x$ M: j; d5 w: Gand each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.
& j( u- _5 @" ]' J/ Q2 }是否说明测量分为两种情况,一种是接地测量,一种是不接地测量?? |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有账号?注册安规
x
|