Which accuracy class do I need?
Permissible current error and phase displacement of the classes to IEC 61869-2 – including partial load, where the differences are largest.
Input values
Limits of the class 0,5
| 5 % | ± 1,5 % | ± 90′ |
| 20 % | ± 0,75 % | ± 45′ |
| 100 % | ± 0,5 % | ± 30′ |
| 120 % | ± 0,5 % | ± 30′ |
Permissible error to IEC 61869-2
- Applicable reference point
- 100 %
- Current error
- ± 0,5 %
- Phase displacement
- ± 30′
- Equals at the secondary output
- ± 25 mA
The standard only specifies limits at the listed reference points. Between two points the value of the next lower one applies. The values apply at rated burden and rated frequency.