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Quick Installation Guide for Solar Power Inverter M125HV EU V1 EN 2019-04-01
Basic safety instructions
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter during operation. When the inverter
is disconnected from all power sources, this
voltage remains in the inverter for up to 135
seconds.
Therefore, always carry out the following steps
before working on the inverter
1. Turn both DC isolating switches to the
OFF
position.
2. Disconnect the inverter from all AC and DC
voltage sources and make sure that none
of the connections can be accidentally
restored.
3. Wait at least 135 seconds until the internal
capacitors have discharged.
DANGER
Electric shock
Potentially fatal voltages are present at the
inverter DC connections. When light falls on the
solar modules, they immediately start to gener-
ate electricity. This also happens when light
does not fall directly on the solar modules.
► Never disconnect the inverter from the solar
modules when it is under load.
► Turn both DC isolating switches to the
OFF
position.
► Disconnect the connection to the mains so
that the inverter cannot supply energy to the
mains.
► Disconnect the inverter from all AC and DC
voltage sources. Ensure that none of the
connections can be restored accidentally.
► Ensure that the DC cables cannot be
touched accidentally.
WARNING
Electric shock
If the doors of the inverter are open, the IP65
degree of protection is no longer guaranteed.
► Only open the doors when absolutely
necessary.
► Do not open the doors if water or dirt might
enter the inverter.
► After work is completed, ensure that the
doors are properly shut and screwed in
again. Check that the doors are properly
sealed.
WARNING
Heavy weight
The inverter is very heavy.
► The inverter must be lifted and carried by
at least 3 people or using appropriate lifting
gear.
● To comply with the IEC 62109-5.3.3 safety requirements
and avoid injury or material damage, the inverter must be
installed and operated in accordance with the safety and
operating instructions set out in this manual. Delta Electron-
ics is not responsible for damage resulting from failure to
follow the safety and operating instructions set out in this
manual.
● The inverter may be installed and commissioned only by
installers who have been trained and certified for the instal-
lation and operation of mains-based solar inverters.
● All repair work on the inverter must be carried out by Delta
Electronics. Otherwise, the warranty will be void.
● Warning instructions and warning symbols attached to the
inverter by Delta Electronics must not be removed.
● The inverter has a high leakage current value. The ground-
ing cable
must
be connected before commencing opera-
tion.
● Do not disconnect any cables while the inverter is under
load due to risk of a fault arc.
● To prevent damage due to lightning strikes, follow the provi-
sions that apply in your country.
● The surface of the inverter can get very hot during op-
eration. Always wear safety gloves when you touch the
inverter.
● The inverter is very heavy. For hoisting and moving, use a
mechanical lifting device (e.g. crane or block and tackle).
At least three persons are required for manual hoisting and
moving.
● Only equipment in accordance with SELV (EN 60950) may
be connected to the RS485 interfaces.
● All external connections must be sufficiently insulated in
order to ensure the IP65 degree of protection. Seal any un-
used connection openings with the closure caps supplied.
● The covers in the interior of the inverter do
not
have to be
removed for the installation. All connections required for the
installation are also accessible with the covers installed.
