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个人理解是跟电荷的能量危险有关,比如60950-1 Clause 2.4有类似要求:
+ F, U6 Q d3 q' t# q; ?For parts not exceeding 450 V peak or d.c., the circuit capacitance shall not exceed 0,1 μF., H3 J# U* _" s$ E, g0 E( l
For parts whose voltage, U, exceeds 0,45 kV peak or d.c., but does not exceed 15 kV peak or
: N+ u% A- b% C9 i4 hd.c., the circuit capacitance shall not exceed 45/U nF, where U is expressed in kilovolts.- S+ \7 y8 L5 Y. \1 @0 t [
NOTE 2 The limit of 45/U corresponds to an available stored charge of 45 μC.
& g4 g- |3 E: VFor parts whose voltage, U, exceeds 15 kV peak or d.c., the circuit capacitance shall not, h" p" L1 {' m" T7 B' ^" s2 _
exceed 700/U2 nF, where U is expressed in kilovolts.( P& k' v* a- {+ t- [9 W
NOTE 3 The limit of 700/U2 corresponds to an available energy of 350 mJ.
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$ ?( L* _: B" v+ I/ X/ t7 y60065 Clause 9.1.1有类似要求:
; ^ \0 h- f3 ], q: Nand moreover
3 X) y/ X! s( `6 m4 Oc) the charge exceeds 45 μC for stored charges at voltages between 60 V d.c. and 15 kV d.c.,0 N% G* Y+ z; K
or
1 t4 {+ H! u( I# a% R& l) gd) the energy of discharge exceeds 350 mJ for stored charges at voltages exceeding 15 kV d.c. |
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