Ground Conductor Current - Fronius 10.0-1 Serviceanleitung

1 Measuring instrument
2 Inverter
9 Measuring lead
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*) These requirements relate to DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. In addi-
tion, individual national requirements and standards must also be observed.
Ground conduc- Preparation
tor current -
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Once the inverter has been connected, it must be put back into operation. For the mea-
surement, the inverter must feed into the grid, as failure to do this will lead to an incorrect
measurement result.
Only the leakage currents which occur at grid frequency may be used (50–60 Hz function
of the current injection probe). High frequency leakage currents distort the measurement
results *).
*) These requirements relate to DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. In addi-
tion, individual national requirements and standards must also be observed.
Two processes may be used for measuring the ground conductor current:
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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.
154
The resistance must not exceed 0.3  *)
Measurement should only be carried out once the ground conductor resistance test
has been carried out successfully
Direct process: The device must be insulated from ground. There must be no addition-
al connections to the ground potential (e.g. data leads, assembly)
Remove conductive objects from the housing
Mount missing housing parts.
WARNING! An electric shock can be fatal. During the measurement, there are
voltages at the inverter.
Direct process: Device must be insulated and may not be linked to another ground po-
tential.
Differential current process:
Example: Measurement of the ground conductor re-
sistance
(A) – release on power module lid
- If necessary, the wall bracket must be lightly
scratched in order to penetrate the Eloxal or powder
layer