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IEC60950-1:2005 AM1已经修改了要求，并不要求两个电容一定是容值相同了：
# T" S* F3 \+ R: B' L修改前：% K8 N0 q: j& ?0 |0 x# `9 P/ R
7 If two or more capacitors are used in series, they shall2 C# N x+ x$ G+ `$ s
- all have the same nominal capacitance value;0 V! k6 |$ o; j" ?3 E4 Q8 Z
- each be rated for the total RMS WORKING VOLTAGE across the insulation; and- ?7 S& A' U/ ?' a6 O+ c1 Y# H; D
- comply with the other rules above.8 u. k" ~ I) |; i
修改后：- @& U- \/ l, A( X' W9 ~. c" R- C, h
7 If two or more capacitors are used in series, all of the following apply:6 d0 d; I& b# B( Y$ [9 R
– under single fault conditions, the voltage on each of the remaining individual capacitors shall not exceed the voltage rating of the relevant individual capacitor;/ k+ c( }" O$ L, e2 u: m
– for BASIC INSULATION or SUPPLEMENTARY INSULATION, the sum of the peak impulse test voltages of all capacitors shall be not less than the peak value of the test voltage (not the r.m.s. voltage) of Table 5B, or the peak value of the test voltage of Table 5C, as applicable;
5 i! |1 q5 `0 |' f: `6 E– for BASIC INSULATION or SUPPLEMENTARY INSULATION, the sum of the r.m.s. test voltages of all capacitors shall be not less than the required r.m.s. test voltage of Table 5B, or the equivalent r.m.s. test voltage (not the peak voltage) of Table 5C, as applicable;
+ m& @: ]1 ?( Z. m" @– for REINFORCED INSULATION, the sum of the peak impulse test voltages of all capacitors shall be not less than the peak value of the test voltage (not the r.m.s. voltage) of Table 5B, or the peak value of the test voltage of Table 5C, as applicable;) }, i5 j0 H; u0 e) T1 s! U& t
– for REINFORCED INSULATION, the sum of the r.m.s. test voltages of all capacitors shall be not less than the required r.m.s. test voltage of Table 5B, or the equivalent r.m.s. test voltage (not the peak voltage) of Table 5C, as applicable;: E, D: y4 A; W4 N) `4 d* Q5 m
– they shall comply with the other rules above. |
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发表于 2012-5-29 23:59
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