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请参考IEC60950-1 Annex Q中描述如下:/ L- |. y) h, N! c5 U
A VDR used in a PRIMARY CIRCUIT shall comply with IEC 61051-2, with the following details.# J. A! b: }: u; m" p3 v
a) Preferred climatic categories (2.1.1 of IEC 61051-2)! T" p7 S1 a3 c5 d
Lower category temperature: - 10 °C
0 |/ e, x) y3 f/ ]7 RUpper category temperature: + 85 °C: d }1 _% ~" n! d: ~3 n4 |
Duration of damp heat, steady state test: 21 days
) y! ?% k; [( J! Hb) Maximum continuous voltage (2.1.2 of IEC 61051-2)& p4 ~: t) V: i; N8 t2 f
The maximum continuous a.c. voltage is selected from the list of preferred voltages and$ j& h- J1 w( c4 ^/ U" p
shall be at least 120 % of# ^5 \; S1 @) @1 A$ V
− the RATED VOLTAGE of the equipment or; N, i1 B/ Z5 A* O Y' C7 K5 w+ c7 q
− the upper voltage of the RATED VOLTAGE RANGE of the equipment.% {9 v% o* b# Y
c) Pulse current (Table I group 1 of IEC 61051-2)
8 p: t: |/ l9 ~Combination pulses of 6 kV/3 kA of alternating polarity are used, having a pulse shape of
$ u4 b) F9 r% C) E8 U1,2/50 μs for voltage and 8/20 μs for current.# ]" z5 I {9 c5 t8 g9 `& e
In addition to the performance requirements of Table I group 1, the clamping voltage after the
: [7 ^* L1 l- h2 y7 g4 T6 \test shall not have changed by more than 10 % when measured with the manufacturer's t( E) T2 @8 ^. x. q) \
specified current. |
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