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本帖最后由 H-RH 于 2013-8-22 13:24 编辑 9 |/ U! R6 ^" K P: _# I
0 X# e& x; |, Q0 v$ J1 ]+ z5 Classification of equipment
J R6 n1 X$ e+ HFor the purpose of harmonic current limitation, equipment is classified as follows:
( r, V f3 [5 B/ kClass A:
* h! o! z. ]4 a2 k– balanced three-phase equipment;3 ^9 `. f) C: N4 u7 r% L
– household appliances, excluding equipment identified as class D;
# n+ }2 }* V3 M! \0 ]– tools, excluding portable tools;9 S8 X3 ~/ }( z6 K# y
– dimmers for incandescent lamps;
9 K7 S5 f9 L8 ~– audio equipment.
* j6 a, m1 g0 h" z, V6 xEquipment not specified in one of the three other classes shall be considered as class A; g) M! y- d) {" d( }
equipment.) h3 b6 l5 {( n4 G, p5 I) r
NOTE 1 Equipment that can be shown to have a significant effect on the supply system may be reclassified in a- l) g8 c# X9 n* w4 ]) ~
future edition of the standard. Factors to be taken into account include:: [# Y# J9 m! e
– number of pieces of equipment in use;
# h: V2 ?* d; }% x3 a+ J/ g8 y– duration of use;2 z, _6 k+ T/ F( s" t+ |( `
– simultaneity of use;
$ S, H1 m! @: n% B– power consumption;* f" J7 K7 B% s$ h
– harmonic spectrum, including phase.
8 _9 N9 X" s# D. f. e1 P$ V& e4 F q; Q2 F; j! k$ U) f& w
Class B:1 {# R9 J1 m7 B" e9 q3 s" w' G
– portable tools;; J- H% g! R% D* s; \
– arc welding equipment which is not professional equipment.5 w4 B9 R `. [ Z' C. ?6 k6 y
% [; T# u, B: e3 c4 C
Class C:& I0 _8 X: i. C* n1 b
– lighting equipment.
% Q) u- Z; p8 F. J; }) P
0 @2 l6 @$ e8 E0 o' b7 uClass D:2 K" j- ~% A7 |
Equipment having a specified power according to 6.2.2 less than or equal to 600 W, of the
3 t7 g' B$ ~/ ~% h; {! x( {following types:6 k" r' M! G$ R1 h7 E7 K* I
– personal computers and personal computer monitors;# O, J+ m/ @3 w* O
– television receivers.1 p5 V* V) m4 k
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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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