Ground Conductor Discharge - Fronius Primo serie Serviceanleitung, Ersatzteilliste

All inputs (terminals) on inverters must be measured individually.
On the wall bracket one point suffices as the terminals are interconnected internally.
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 they are de-energized before the
safety inspection can be continued. Alternatively, the capacitors can be dis-
charged by short-circuiting the tested potentials or using the discharge function
on the insulation 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!
Examples of measuring points when testing the insu-
lation resistance
IMPORTANT! Measure only in the green-
framed area.
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