AN3157

Experimental results

Doc ID 17105 Rev 1

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4.2

Typical phase energy measurement accuracy

4.2.1

This single phase energy measurement has been carried out in the following conditions:

Phases S and T not connected.

Table 6.

Limits for class 1 meters: poly-phase meters with symmetrical voltages and balanced

I (A)

% of In

Error (%)

2*In

200%

± 1%

In

100%

± 1%

0.2*In

20%

± 1%

0.1999*In

19.99%

± 1%

0.1*In

10%

± 1%

0.0999*In

9.999%

± 1.5%

0.05*In

5%

± 1.5%

Table 7.

Phase energy measurement

I (A)

% of In

Error (%)

10

200%

0.026%

8

160%

0.034%

5

100%

-0.006%

2

40%

-0.049%

1

20%

-0.069%

0.5

10%

-0.062%

0.2

4%

-0.060%