NOTE The approximate values of 10 m

NOTE The approximate values of 10 mA and 20 mA above are not critical, but it is important to ensure that the residual current change applied is small enough to trigger disconnection due to the continuous residual current detection system, not due to the sudden change residual current detection system4.8.3.5.3 Test for detection of sudden changes in residual currentThis test shows that the residual current sudden change function operates within the limits forresidual current and trip time, even when the sudden change is superimposed over a preexisting baseline level of continuous residual current.a) Setting the pre-existing baseline level of continuous residual current: An adjustable capacitance is connected to one PV terminal. This capacitance is slowly increased until the inverter disconnects by means of the continuous residual current detection function. The capacitance is then lowered such that the continuous residual current is reduced below that disconnection level, by an amount equal to approximately 150 % of the first residual current sudden change value in 4.8.3.5.1 b) to be tested (e.g. 45 mA for the 30 mA test) and the inverter is re-started.b) Applying the sudden change in residual current: An external resistance, pre-adjusted to cause 30 mA of residual current to flow, is connected through a switch from ground to the same PV input terminal as the capacitance in step a) above. The time shall be measured from the moment the switch is closed (i.e. connecting the resistance and applying the residual current sudden change) until the moment the inverter disconnects from the grid, as determined by observing the inverter output current and measuring the time until the current drops to zero. This test shall be repeated 5 times, and all 5 results shall not exceed the time limit indicated in the 30 mA row of Table 31.Steps a) and b) shall then be repeated for the 60 mA and 150 mA values and times in Table 31.