Fronius Symo 3.0-3-S Serviceanleitung Seite 112

Ground conductor current
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Contact Current
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112
The effective inner resistance of the ground conductor current measuring device
may be a maximum of 5 W. (With higher resistances, measures must be taken to
prevent the occurrence of hazardous contact voltages.)
The measuring range must comprise at least the values from 0.25 mA to 19 mA.
The inspection facility must assess the measured current to be an effective value
regardless of the waveform.
The effective inner resistance of the contact current measurement instrument must
be 1 kW to 2 kW.
If the current test circuit is accidentally connected to a voltage up to 120% of the
nominal grid voltage, the user must not be endangered and the test circuit must not
be damaged.
The inspection facility must assess the measured current to be an effective value
regardless of the waveform.