Cause : Summation current impermissibly high comes when the smoothed sum of the phase currents (i1 + i2 + i3) is impermissibly high. The summed current has exceeded the parameterized threshold for the ground fault monitoring (p0287).

Possible causes:

- there is a ground fault that results in a high summation current (r0069.6). The DC component in the line currents can damage/destroy the power unit, line reactor or line filter!
- the zero point calibration of the current measurement was not carried out (p3491, A06602).
- the current measurement in the power unit is defective.

Fault value (r0949, floating point): Smoothed total of the phase currents.

- check the line supply for ground faults and remove any that are present.
- check the set threshold for the ground fault monitoring (p0287).
- if required, replace the power unit.