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本帖最后由 H-RH 于 2013-8-22 13:24 编辑 8 h% _4 j: P5 N8 v
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5 Classification of equipment
# Y% p: U5 H- z: O) b; uFor the purpose of harmonic current limitation, equipment is classified as follows:
: u1 W& w0 v. O# \* P* f h+ N/ \Class A:+ T" b" ?; [' o; s& p4 q- E) l- p
– balanced three-phase equipment;
8 i% [2 I0 T0 O/ \6 D1 Q– household appliances, excluding equipment identified as class D;
$ T/ A& F: E1 u' X; F7 v2 C– tools, excluding portable tools;
6 J) e! B4 x6 _' v' ?; Z" x. P– dimmers for incandescent lamps;
1 D- t: r; K( c. c' B; i– audio equipment.; L; G7 s4 h8 \: G) U
Equipment not specified in one of the three other classes shall be considered as class A! I$ o6 q- _' J
equipment.
: u! U. _, M0 x" ?" h8 z; FNOTE 1 Equipment that can be shown to have a significant effect on the supply system may be reclassified in a, Z- E( v8 Y* \$ p. ]# ?, p
future edition of the standard. Factors to be taken into account include:7 Y7 K3 Q6 m1 v" w5 N
– number of pieces of equipment in use;1 H5 n+ V' x- H
– duration of use;
( |* ~6 N% M1 b( X– simultaneity of use;) j: [) u6 L% r- K" l% x$ o- w
– power consumption;8 S3 N' R! x2 B1 u
– harmonic spectrum, including phase.6 ~9 h" e4 S0 ^8 m" _. @
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Class B:
$ x8 i! n+ O. @. j+ E* |- P S– portable tools;
' l E0 V5 `2 n6 K$ f$ b– arc welding equipment which is not professional equipment.
z# j7 n( z1 o# S
3 D6 J0 w, e3 b1 mClass C:
: p: P1 ]) U, _8 [6 t– lighting equipment.9 m s$ X h& v! {& p. `
$ [( A( p7 x3 l9 o0 i2 E$ D. hClass D:. ^2 ~* s5 A/ E9 }/ |1 @& C2 B
Equipment having a specified power according to 6.2.2 less than or equal to 600 W, of the
3 W; G6 D' Z5 m' a3 Hfollowing types: Y, m# }9 j- ]9 E+ I
– personal computers and personal computer monitors;
. t, Q( B) x$ C+ T5 e, c& L– television receivers.- w. w. E; k8 \: s1 [& |
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发表于 2013-8-22 10:55
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发表于 2013-8-22 13:22
