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本帖最后由 H-RH 于 2013-8-22 13:24 编辑 0 q) f2 Y+ l8 e+ y- n
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5 Classification of equipment
' i: r8 Y! b) N! X* WFor the purpose of harmonic current limitation, equipment is classified as follows:1 ?! H: V9 u4 u' P7 d! Z; [, \
Class A:
! u8 O- _2 Q6 I– balanced three-phase equipment;; I6 _+ x5 X0 R% n; F! n2 J& O
– household appliances, excluding equipment identified as class D;
* v7 Z1 ?7 i; t/ g5 {/ L& Q) i– tools, excluding portable tools;
5 N1 h. k2 q. `- Z l- q* J# t– dimmers for incandescent lamps;
" D/ v0 V# n0 ^/ ?+ _/ z– audio equipment.- ?" n! r% X4 G9 } w$ v2 j
Equipment not specified in one of the three other classes shall be considered as class A
3 c# v B: `6 M# r0 Kequipment.; R( [6 p$ `5 b8 n7 M f1 p
NOTE 1 Equipment that can be shown to have a significant effect on the supply system may be reclassified in a0 f4 K+ Y! u+ m0 i3 D
future edition of the standard. Factors to be taken into account include:6 B3 p1 e3 ~, r" H' v
– number of pieces of equipment in use;) ^* I. {0 k5 A9 T' r
– duration of use;# N8 z* a" V3 j- A2 r
– simultaneity of use;4 i+ n4 @" K; G8 Q
– power consumption;9 y# O' M, F. i* F2 u8 n
– harmonic spectrum, including phase.. N4 n) a! l2 p; x1 i
( X, v* r5 M0 D2 _. K$ ~Class B:
0 Q3 P; F: N3 o" o– portable tools;
; f' F6 X$ y$ \: w* b– arc welding equipment which is not professional equipment.
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Class C:: V( _% U9 _5 d; F$ [" A0 X
– lighting equipment.
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Class D:
( T1 t" h; G' qEquipment having a specified power according to 6.2.2 less than or equal to 600 W, of the% V/ t2 i! {) v4 H- ]# k8 y
following types:
; Y Y2 J' k( q7 v– personal computers and personal computer monitors;# ]% O" _( b# Z4 ~2 l
– television receivers.
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