Safety; General Safety Note; Switching Off And On Safely; Intended Use - Weidmuller PV Next series Bedienungsanleitung

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Safety

This section includes general safety notes for handling the
product. Specific warnings for specific tasks and situations
are given at the appropriate places in the documentation.
Failure to observe the safety notes and warnings can result
in physical injury and property damage.

2.1 General safety note

– Before carrying out any work on the product, it must be
switched off and free of dangerous voltage (see section
2.2). This reduces the risk of electric shocks or arcing.
– The product is not suitable for use in potential-
ly explosive atmospheres. Work on the PV Next
String Combiner Box can produce sparks that can ignite
a potentially explosive air mixture.
– The approved environmental conditions for the installa-
tion site must be observed.
– The operator must ensure that the product is not acces-
sible to unauthorised persons.
– No combustible or electrically conductive materials may
be stored inside the enclosure.
– The PV Next String Combiner Box must not be operated
with damaged cables or connectors, as they may cause
electric shock, short circuit or fire. Do not touch dam-
aged areas and ensure the system is not live. Have the
system checked and repaired by a specialist.
– Fuse links must not be removed or inserted under load
as this may result in life-threatening arcing.
– Suitable personal protective equipment must be worn
during all work on the product.
– During installation and maintenance work, make sure
that no moisture can penetrate into the enclosure.
– The PV system must be designed in such a way that all
components are operated exclusively within their per-
missible operating range.
– Local installation regulations must be observed.
– If a fault in the product cannot be remedied by the meas-
ures described in these instructions, you must return the
product to Weidmüller. Weidmüller does not provide a
guarantee if the product has been tampered with.
– The outputs of the PV Next String Combiner Box must
never be connected to the inverter (load) while it is live.
Even when the inverter is switched off, charging the in-
ternal capacitors can lead to dangerous arcing.
– Never touch exposed live parts or cables.
– Do not disconnect PV connectors under load.
– Disconnect the inverter before carrying out any main-
tenance work. Inverters contain capacitors that store
life-threatening voltages. Wait until the capacitors are
discharged.
– Follow the operating instructions of the inverter you are
using. Contact the manufacturer for more information
and advice.
2690250000/00/08.2019

2.2 Switching off and on safely

Risk of fatal electric shock when touch-
ing live DC cables and live parts in the
opened product!
PV systems can generate dangerous voltag-
es. Before starting work, ensure that the PV
system and devices are disconnected from the
mains and from the PV generators.
► Before carrying out any work on the prod-
uct, it must be disconnected from the power
supply and secured against being switched
on again.
Switching off safely
► Make sure there is no voltage before you open the
PV Next String Combiner Box. Proceed exactly in this
order:
1. Switch off the inverter.
2. Switch the switch-disconnector of the PV Next
String Combiner Box or of the inverter to the off-position.
3. Disconnect all string cables to the inputs of the PV Next
String Combiner Box. Both the positive and negative
connections must be disconnected.
You can now open the PV Next String Combiner Box.
Switch on once all work has been completed:
► Close the PV Next String Combiner Box with the cover.
► Check the voltage, polarity and absence of earth faults
of the string cables.
► Reconnect the string cables to the connectors on the
underside of the PV Next String Combiner Box.
– Pay attention to the correct polarity and assignment
of the string cables.
– Only connect string cables with identical open-circuit
voltages.
► Switch the inverter on again using the switch-disconnec-
tor on the output side.

2.3 Intended use

The PV Next String Combiner Box is intended to be in-
stalled in the DC connection between photovoltaic modules
and inverters. Any other use is considered improper. Mod-
ifications to the product and the installation of further com-
ponents are only permitted if recommended by Weidmüller.
Observance of the documentation is also part of the intend-
ed use.
DANGER
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