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For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
: m0 m1 U& C: ~a) if the PEAK WORKING VOLTAGE does not exceed the peak value of the AC MAINS SUPPLY
) i& S1 J+ }7 U( Z2 q j6 ovoltage, minimum CLEARANCES are determined from Table 2K;
2 u3 {1 I+ F: M8 A" R7 r" Jb) if the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage,
7 Q, d6 w3 ~- z& E7 `the minimum CLEARANCE is the sum of the following two values:! m( M2 |: V1 a% E; C
• the minimum CLEARANCE from Table 2K; and9 X" C( B) D" M# V
• the appropriate additional CLEARANCE from Table 2L.1 o9 Y9 T& `7 {) p. p$ \* x
* Y8 ]( y1 y$ ]: k. b* Y
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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