The illustrations in this section show the
M88H_121 (ST). The procedure for the
M88H_122 (CF) is identical.
WARNING
High current
► Always observe the local regulations relating
to grounding cable requirements.
► To increase the safety of the system, always
ground the inverter housing even when this
is not required by the local regulations.
► Always ground the inverter housing
before
connecting the inverter to the mains and
solar modules.
► The grounding cable cross-section must be
at least 6 mm
2
.
1. Bolt the grounding cable onto the inverter. M6 nut, spring
washer, and lock washer are already mounted on the
inverter.
2. Perform a continuity check of the grounding connection.
DANGER
Electric shock
In IT grids, a twofold insulation fault can lead to
high residual currents on the inverter housing.
► Ground the housing of the inverter via the
grounding connection.
► Set up a permanent insulation monitoring
system.
► The first time an insulation fault occurs,
this insulation fault must be rectified
immediately
!
29
Quick installation guide for solar inverter M88H RPI883M121300 RPI883M122300 EU V1 EN 5017414200_00 2019-11-07
Grounding the inverter housing
