Safety 17
Grounding safety (PE)
WARNING! Obey these instructions to prevent injury or death, increased
electromagnetic interference and equipment malfunction.
• Obey all of the electrical safety regulations of the installation country.
• Connect the protective earth (PE) to the inverter and associated equipment to
ensure personal safety and electromagnetic compatibility.
• Make sure that the grounding connections meet the safety regulations.
• Do not connect the protective earth in a chain configuration. Connect each
inverter directly to the protective earth (PE).
• Do not ground the DC+ or DC- live conductors.
• Do not use PV modules that require grounded DC+ or DC- conductors. The DC
side and AC grid are not galvanically separated.
• Use a fixed PE connection, because the touch current of the inverter can be
above 3.5 mA
AC
or 10 mA
DC
(as stated by IEC/EN 62 109, 5.2.5). Refer to Power
cable requirements on page 37.
6. Screw terminals (standard and -S model):
a) Remove the first cover. Refer to First cover
on page 50.
b) Remove the DC input cover. Refer to DC
input cover on page 51.
c) Make sure that the DC cables are marked
clearly for correct connection.
d) Use a multimeter to make sure that there is
no voltage between DC input terminals (DC+
and DC-), and no voltage between DC input
terminals and ground (DC+ and PE terminal or
DC- and PE terminal)
e) Loosen the terminal screws.
f) Loosen the cable glands.
g) Pull the DC cables through the cable
glands.
7. Use a multimeter (impedance >1 Mohm) to measure that there is no voltage between
ground (PE terminal) and the inverter input and output terminals.
8. Disconnect any external power sources from the control connectors (for example, to the
relay output).
To isolate the inverter from external power sources:
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