Article 4.7.2B : How to calculate Accuracy of iELR Meter ?

Article 4.7.2B : How to calculate Accuracy of iELR Meter ?

Accuracy is claimed only for FULL SCALE reading in the IELR Meter- Meaning, Accuracy limits are to be only calculated for

12 Amps -  in 300mA to 12A Meter
30 Amps-  in 30mA to 30A Meter.(Latest Model)

The accuracy class is 2% for all ranges of CBCT & iELR

Example- 

Meter is              300 mA to 12A

Calculation-

Meter Full Scale-           12A
Accuracy class-            +/- 2% of FS
Current Limit will be      240 mA. (2% of FS).

if Trip Current is set at 1000 mA in the Meter, then trip can occur in between the range of 760 mA to 1240 mA -

 Note- Please Consider 300 mA as starting sensing current in the Meter)