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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
3 X- Y9 e& z: M$ A, Sa) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
$ s" Q0 ?& E$ D9 B: k# C( }voltage, minimum CLEARANCES are determined from Table 2K;8 ]' N0 e8 f9 }; v: Q1 r# T
b) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,3 _9 D' z8 f1 {4 T- p: |, r# F
the minimum CLEARANCE is the sum of the following two values:( V- m$ b1 V* E s6 D
• the minimum CLEARANCE from Table 2K; and
1 {9 R+ a7 m& R. L• the appropriate additional CLEARANCE from Table 2L.- ~1 v* d9 l5 U) Q
9 U& k0 G1 _' v1 Z) T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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