Insulation Monitoring; Rcmu; Warning Notices On The Device - Fronius Primo 3.0-1 Service Manual

Utilization in conformity with the "intended purpose" also includes
-
-
When configuring the photovoltaic system, make sure that all photovoltaic system compo-
nents are operating completely within their permitted operating range.
All measures recommended by the solar module manufacturer for maintaining solar
mod-ule properties must be followed.
Insulation moni- In the case of PV systems with ungrounded solar modules, the inverter checks the resist-
toring ance between the positive or negative pole of the PV system and the ground potential. In
the event of a short circuit between DC+ or DC- cable and ground (e.g. due to inadequately
insulated DC cables or damaged solar modules), the inverter disconnects from the grid.

RCMU

RCMU = Residual Current Monitoring Unit
(universal current-sensitive residual current monitoring unit)
The inverter is equipped with a universal current-sensitive residual current monitoring unit
in accordance with IEC 62109-2.
This device monitors residual currents from the solar module to the grid connection of the
inverter and disconnects the inverter from the grid in the event of unauthorised residual
current.
Warning notices There are warning notices and safety symbols on and in the inverter. These warning notic-
on the device es and safety symbols must not be removed or painted over. They warn against operating
the device incorrectly, as this may result in serious injury and damage
Text of the warning notices:
WARNING!
An electric shock can be fatal. Make sure that both the input side and output side of the
device are de-energised before opening the device. Wait for the capacitors to discharge (5
minutes).
Following all the instructions in these operating instructions
Carrying out all the specified inspection and servicing work
5
Safety symbols:
Risk of serious injury and damage
due to incorrect operation
Do not use the functions de-
scribed here until you have fully
read and understood the following
5
documents:
-
-
5
5
Dangerous electrical voltage
5
Wait for the capacitors to dis-
charge.
these operating instructions
all the operating instructions
for the system components of
the photovoltaic system, es-
pecially the safety rules
87