Current harmonic test

2018-07-23 12:10:22 SUSHI GUANGBO TEST TECHNOLOGY CO.,LTD 已读
Current harmonic test
 
Harmonic current test main test equipment
 
Limits:
 
Table 1 Limits of Class A equipment
 
Harmonic number n
Maximum allowable harmonic current
Odd harmonic
3
2.30
5
1.14
7
0.77
9
0.40
11
0.33
13
0.21
15≤n≤39
0.15×15/n
Even harmonic
2
1.08
4
0.43
6
0.30
8≤n≤40
0.23×8/n
(Note: The harmonics of the input current of Class B equipment should not exceed 1.5 times the value given in Table 1.)
 
Table 2 Limits for Class C equipment
 
Harmonic number n
Maximum allowable harmonic current /% indicated by the percentage of input current at the fundamental frequency
2
2
3
30×λ
5
10
7
7
9
5
11≤n≤39
3
λ is the circuit power factor.
Table 3 Limits of Class D equipment
 
Harmonic number n
Maximum allowable harmonic current per watt mA/W
Maximum allowable harmonic current A
3
3.4
2.30
5
1.9
1.14
7
1.0
0.77
9
0.5
0.40
11
0.35
0.33
13≤n≤39
3.85/n
(See Table 1)
Harmonic current test product range
 
Class A: balanced three-phase equipment;
 
Household appliances, excluding equipment listed in category D;
 
Tools, excluding portable tools;
 
Incandescent dimmer;
 
Audio equipment.
 
Devices that are not specified as Class B, C, and D are considered Class A devices.
 
Class B: portable tools;
 
Arc equipment that is not part of a dedicated device.
 
Class C: Lighting equipment.
 
Class D: The following devices with a power of no more than 600W
 
Personal computer and personal computer display;
 
Television receiver.
 
Recommendation
 
IEC61000-3-2
 
EN61000-3-2
 
GB17625.1
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