Fronius Primo serie Serviceanleitung, Ersatzteilliste Seite 153

Measurement can be carried out either at the inverter (loop outside the device) or in the
distributor. During the measurement in the distributor, ensure that no live conductors are
located in the immediate vicinity and no other consumers are on the same circuit.
Direct process – Measurement of the ground conductor current with the injection probe
via the PE conductor.
PE L1 N
mA
9 9
PE L1 N
1 Measuring instrument
2 Inverter
8 Insulated assembly of the object being tested
9 Measurement lead
Differential current process – Measurement of the ground conductor current using injec-
tion probe via N and L leads.
As with a residual circuit breaker, the currents are compared between the phase conductor
(L) and the neutral conductor (N) via a transformer. The difference is displayed.
PE L1 N
9 9 9
PE L1 N
1 Measuring instrument
2 Inverter
9 Measuring lead
When carrying out the measurement (direct or differential current process), the ground
conductor current must not exceed the limit value of 3.5 mA **).
**) These requirements relate to DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. In ad-
dition, individual national requirements and standards must also be observed.
1
9
Examples for measuring the ground conductor current
2
8
mA
1
Examples for measuring the ground conductor current
2
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