Safety Instructions - Delta M250HV Installation And Commissioning Instructions

Safety instructions

Read this manual in full before starting work
on the inverter.
DANGER
Electric shock
Potentially fatal voltages are present in the
inverter during operation. When the invert-
er is disconnected from all power sources,
this voltage remains present in the inverter
for up to 150 seconds.
You should therefore always carry out
the following steps before working on the
inverter:
► Never disconnect the inverter from the
solar modules when it is under load.
1. Disconnect the connection to the grid
so that the inverter cannot feed energy
into the grid.
2. Turn all four DC isolating switches to
the OFF position.
3. Disconnect the inverter from all AC and
DC voltage sources. Make sure that
none of the connections can be re-
stored accidentally.
4. Wait at least 150 seconds until the
internal capacitors have discharged.
5. Ensure that the DC cables cannot be
touched accidentally.
DANGER
Electric shock
The inverter has a high leakage current
value.
► Always connect the ground cable first,
then the AC and DC cables.
DANGER
Electric shock
In IT grids, a twofold insulation fault can
lead to high residual currents on the invert-
er 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!
4
DANGER
Electric shock
Potentially fatal voltages are present at the
DC connections of the inverter. When light
falls on the solar modules, they immedi-
ately start to generate electricity. This also
happens when light does not fall directly on
the solar modules.
► Never disconnect the inverter from the
1. Disconnect the connection to the grid
2. Turn all four DC isolating switches to
3. Disconnect the inverter from all AC and
4. Wait at least 150 seconds until the
5. Ensure that the DC cables cannot be
WARNING
Electric shock
IP66 protection degree is no longer guar-
anteed when the door is open.
► Only open the doors when absolutely
► Do not open the doors if water or dirt
► After work is completed, ensure that the
WARNING
Heavy weight
The inverter is very heavy.
► Lift and transport the inverter with suit-
► At least three people are required to lift
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
solar modules when it is under load.
so that the inverter cannot feed energy
into the grid.
the OFF position.
DC voltage sources. Make sure that
none of the connections can be re-
stored accidentally.
internal capacitors have discharged.
touched accidentally.
necessary.
might enter the inverter.
door is properly shut and the screws
tightened again. Check that the door is
properly sealed.
able lifting equipment, such as a crane.
and carry the inverter.