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reg 7

Harmonics

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7 Harmonics

The standard for the harmonic voltage distortion level of electricity supplied is a distortion level that is less than the compatibility levels set out in the Table to this section.

Table

Compatibility levels for harmonic voltages (in percent of the nominal voltage)

Odd harmonics
non multiple of 3

Odd harmonics
multiple of 3

Even harmonics

Order
h

Harmonic voltage %

Order
h

Harmonic voltage %

Order
h

Harmonic voltage %

5

6

3

5

2

2

7

5

9

1.5

4

1

11

3.5

15

0.3

6

0.5

13

3

21

0.2

8

0.5

17

2

>21

0.2

10

0.5

19

1.5

12

0.2

23

1.5

>12

0.2

25

1.5

>25

0.2+1.3
(25/h)

Note — Total harmonic distortion (THD): 8%

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