Ground Conductor Discharge - Fronius 10.0-1 Serviceanleitung

However the measurement on the DC disconnector must be carried out at the screws and
not at the contacts.
Ground to AC / Ground to DC
1 Measuring instrument
2 Inverter
9 Measuring lead
Capacitor discharge time is at least 6 min.
Ground conduc- -
tor discharge
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WARNING! An electric shock can be fatal. Capacitors may become charged
during the insulation resistance measurement. After the insulation resistance test,
all tested potentials must be checked to ensure it is de-energized before the safe-
ty inspection can be continued. Alternatively, the capacitors can be discharged by
short-circuiting the tested potentials or using the discharge function on the insu-
lation tester.
Measurement should only be carried out once the insulation resistance test has been
passed.
Mount the inverter lid again.
Only successful measurement between the lid and wall bracket guarantees that the
ground conductor function of the inverter is working.
Ensure the device to be checked has been securely disconnected from the AC grid
(mains power line [L and N] must not be connected). If the AC grid cannot be discon-
nected from the wall bracket, the appropriate safety precautions must be taken.
Re-insert the inverter in the wall bracket.
CAUTION! Take safety precautions. Due to DC voltage, follow safety rules!
WARNING! Set DC disconnector of the inverter to level 0 and insert the inverter
in the wall bracket. Installing the inverter means that voltage is now also present
at the inverter.
Primo 10-25
(5)
Primo 10-15
Examples for measuring the insulation resistance.
Overvoltage PC board (5)
153