Areva MiCOM P441 - Page 99

Update Documentation P44x/EN AD/E44
MiCOM P441, P442 & P444 Page 81/82
3.3 Protection accuracy
Earth Fault Measuring Element (I
N
>1 I
N
>2 I
N
>3 I
N
>4)
Thermal Overload Accuracy
Pick-up Thermal alarm
Calculated trip time ±10%*
Thermal overload
Calculated trip time ±10%*
Cooling time accuracy
±15% of theoretical
Repeatability <5%
* Operating time measured with applied current of 20% above thermal setting.