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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
! Y5 y3 t# k2 |& Ua) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY% V5 E0 f2 `$ h; j1 e& @: ]$ A
voltage, minimum CLEARANCES are determined from Table 2K;1 S/ w4 z$ i# w
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
, f* P5 a0 X l7 E2 uthe minimum CLEARANCE is the sum of the following two values:
) ]4 E! j3 D7 m; |• the minimum CLEARANCE from Table 2K; and: s9 ~* H2 q j/ p8 P6 w7 n& d
• the appropriate additional CLEARANCE from Table 2L.
0 O3 G" Y3 Y& j; ?8 b1 Z) [
4 B* I) D9 U& T" i标准中的b)第一点中“the minimum CLEARANCE”是相对于什么的最小间隙呢?? |
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