General; Safety - Fronius Rapid Shutdown Box - Duo Instructions D'installation

General

Safety

Incorrect operation and incorrectly performed work can cause serious injury and
property damage.
Only qualified staff are authorized to commission the Rapid Shutdown Box (RSB) and
only within the scope of the respective technical regulations. Do not start up or carry out
maintenance work until you have read the safety rules.
Work performed incorrectly can cause serious injury and damage.
The Rapid Shutdown Box should only be installed and connected by licensed electri-
cians.
Follow the safety rules!
Before any installation or connection work is carried out, disconnect the AC supply to the
inverter and the DC supply to the Rapid Shutdown Box.
An electric shock can be fatal.
Inadequately sized electrical components can cause serious injury and damage to prop-
erty.
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An inadequate ground conductor connection can cause serious injury and dam-
age to property.
The housing screws provide an adequate ground conductor connection for grounding the
housing and should not be replaced under any circumstances by other screws that do
not provide a reliable ground conductor connection.
The following points must be observed in order to prevent damage to the Rapid
Shutdown Box:
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WARNING!
WARNING!
WARNING!
All electrical connections must be made in accordance with the National Electrical
Code, ANSI/NFPA 70, and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian
standards.
Only use copper wires for all spring-type terminals.
For all grounding cables and DC grounding wires, use a suitable thermal class, min.
194 °F (90 °C).
See NEC table 250.122 for correct dimensioning of the grounding wires
Voltage drop and other considerations may mean larger cable cross sections need
to be used.
WARNING!
CAUTION!
The technical specifications must be followed.
The pressure compensation membrane (1) should never be used for cabling.