2 Basic safety instructions
Installation and Operation Manual M125HV EU V3 EN 2021-07-12
8
2.
Basic safety instructions
DANGER
Electric shock
Potentially fatal voltages are present in the
inverter during operation. When the inverter
is disconnected from all power sources, this
voltage remains in the inverter for up to 135
seconds.
You should therefore always carry out the fol-
lowing 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 restored acciden-
tally.
3. Wait at least 135 seconds for the internal
capacitors to discharge.
DANGER
Electric shock
Potentially fatal voltages are present at the DC
connections of the inverter. When light falls on
the solar modules, they immediately start to
generate 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 grid so that
the inverter cannot feed energy into the grid.
►
Disconnect the inverter from all AC and DC
voltage sources. Make sure 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 three people or using appropriate lifting
gear example, a hoist or crane).
●
To comply with IEC 62109-5.3.3 safety requirements and
avoid injury or material damage, the inverter must be in-
stalled and operated in accordance with the safety and op-
erating instructions set out in this manual. Delta Electronics
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 commissioning.
●
Do not disconnect any cables while the inverter is under
load due to risk of an arc fault.
●
To prevent damage due to lightning strikes, follow the appli-
cable regulations in your country.
●
The surface of the inverter can get very hot during opera-
tion. Always wear safety gloves when touching the inverter.
●
The inverter is very heavy. For lifting and moving, use a me-
chanical lifting device example, a crane or hoist). 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
unused connections with the cover 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.
●
Do not disconnect any cables while the inverter is under
load due to risk of an arc fault.
●
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 opera-
tion. Always wear safety gloves when touching the inverter
(except for the display).
●
Only equipment in accordance with SELV (EN 60950) may
be connected to the RS485 interfaces.
● All connections must be sufficiently sealed in order to
ensure the IP65 rating. Unused connections must be closed
using cover caps.
