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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:
4 v" b, N; z3 h6 Y% i" a9 s: fFor parts not exceeding 450 V peak or d.c., the circuit capacitance shall not exceed 0,1 μF.
% r1 c1 U7 Z0 m8 P0 w/ S5 ~For parts whose voltage, U, exceeds 0,45 kV peak or d.c., but does not exceed 15 kV peak or# {* C7 D1 d* [; k( b
d.c., the circuit capacitance shall not exceed 45/U nF, where U is expressed in kilovolts.
1 w, w5 ?/ K0 R1 R( M+ l) D6 eNOTE 2 The limit of 45/U corresponds to an available stored charge of 45 μC.
% k# k+ R; r8 q8 FFor parts whose voltage, U, exceeds 15 kV peak or d.c., the circuit capacitance shall not
# V, L0 T0 k2 R: b' P+ [exceed 700/U2 nF, where U is expressed in kilovolts.! [7 A# A( c- H) C _5 _( P
NOTE 3 The limit of 700/U2 corresponds to an available energy of 350 mJ.
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60065 Clause 9.1.1有类似要求:
& J2 n8 B/ @8 V1 i8 Cand moreover3 v9 l8 z# U3 }+ k+ o. z
c) the charge exceeds 45 μC for stored charges at voltages between 60 V d.c. and 15 kV d.c.,
2 N" ]3 Z( L$ c( s0 Nor" U$ d# U- w5 P w! m, L
d) the energy of discharge exceeds 350 mJ for stored charges at voltages exceeding 15 kV d.c. |
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