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本帖最后由 H-RH 于 2013-8-22 13:24 编辑
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" m; E# w9 T. N0 v2 R a; T( O5 E5 Classification of equipment
. {$ Y/ V% w: W% jFor the purpose of harmonic current limitation, equipment is classified as follows:
1 ^) C: r8 v) Z, d" c7 nClass A:
c- x" r K; R/ c' P– balanced three-phase equipment;# @) z0 x) M. s
– household appliances, excluding equipment identified as class D;; M) l7 [& s+ k: B6 [& j7 a9 |
– tools, excluding portable tools;
6 c- `, {7 U! K, R, i7 J– dimmers for incandescent lamps;
4 D+ p% X. I0 T2 K/ q: m– audio equipment.2 I$ O$ |: o( W) a7 k7 F
Equipment not specified in one of the three other classes shall be considered as class A3 M5 ^, `8 l* N5 g
equipment.
$ k6 u' a( s4 m( e$ ?NOTE 1 Equipment that can be shown to have a significant effect on the supply system may be reclassified in a
" H) K, `. P! Y" i' ffuture edition of the standard. Factors to be taken into account include:! n/ X/ b4 F5 I6 K' i5 M
– number of pieces of equipment in use;
+ Z" j* H1 H/ n: {5 v– duration of use;- q. k8 R' l/ b
– simultaneity of use;
A" T# e8 C% i) W& F$ x' c– power consumption;
% g9 T, \* j* W6 I/ m– harmonic spectrum, including phase.
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Class B:7 r7 z1 v4 e+ ?9 n1 \! i# d
– portable tools;& Y2 O3 Y# P: f
– arc welding equipment which is not professional equipment.
; B# a& O4 `1 M7 C: g* _. z- p& s" k# z8 |% T+ u
Class C:) D1 o1 N: ]4 e# W) T4 B2 [
– lighting equipment.
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Class D:; x: s9 P! j# V7 _4 G+ b! i
Equipment having a specified power according to 6.2.2 less than or equal to 600 W, of the
3 N% ~- A& A, r; G! W* D: zfollowing types:! m6 D: ]8 p! s3 u. Z) ?1 c
– personal computers and personal computer monitors;9 \' z t8 B, x4 I2 q
– television receivers.
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发表于 2013-8-22 10:55
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发表于 2013-8-22 13:22
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