AN4121

Experimental results

Doc ID 023243 Rev 1

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4.2

Typical phase energy measurement accuracy

4.2.1

Test with symmetrical voltages and only one phase load at PF = 1 and

PF = 0,5 inductive

This single-phase energy measurement has been performed in the following conditions:

PF = 1

PF = 0.5 ind

Table 11.

Limits for class 0,2 meters: poly-phase meters with symmetrical voltages

and balanced loads at PF = 0,5 ind or 0,8 cap

I [A]

error [%]

-

± 0,3%

In

100%

± 0,3%

0,1*In

10%

± 0,3%

0,099*In

9,9%

± 0,5%

0,02*In

5%

± 0,5%

Table 12.

Phase energy measurement

I [A]

% of In [%]

error [%]

10

200%

-0,0003%

8

160%

-0,0212%

5

100%

-0,0426%

2

40%

0,1152%

1

20%

-0,0309%

0,5

10%

-0,0348%

0,2

4%

0,1196%