|
|
For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):: w+ Z8 w0 I& b
a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY# l1 |& l: o y0 ^- Z3 M L" a- u
voltage, minimum CLEARANCES are determined from Table 2K;( `6 q& P/ U6 L0 f' T( ]
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,( E9 g6 b# X6 x+ B+ h
the minimum CLEARANCE is the sum of the following two values:
9 T9 ?1 q% v& z8 W/ w• the minimum CLEARANCE from Table 2K; and4 H8 ^, I) i; l9 j) p1 g
• the appropriate additional CLEARANCE from Table 2L.
1 C. `3 k* ^- a" a' E8 @4 t- I8 K c u- T( o* F" a+ D
标准中的b)第一点中“the minimum CLEARANCE”是相对于什么的最小间隙呢?? |
|