Connecting Solar Module Strings To The Inverter; Safety - Fronius Symo 10.0-3 208-240 Installation Instructions Manual

Connecting solar module strings to the inverter

Safety

Danger from grid voltage and DC voltage from solar modules that are exposed
to light.
An electric shock can be fatal.
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Inadequately sized electrical components can cause serious injury and damage
to property.
An electric shock can be fatal.
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Danger from work that is not carried out properly
This can result in damage to property and severe personal injury.
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Danger due to improperly connected terminals.
This may result in thermal damage to the inverter, which in turn may lead to fires.
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WARNING!
Prior to all connection work, disconnect the AC and DC supply to the invert-
er.
The DC main switch is used only to switch off power to the power stage set.
When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be
carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the invert-
er and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after be-
ing disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the
public grid.
WARNING!
All electrical connections must be made in accordance with the national
standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any
other regulations applicable to the installation site.
Use min. 194 °F (90 °C) copper wire for all grounding wires (see NEC table
250.122).
For all AC/DC wires, use a minimum of 167 °F (75 °C).
Voltage drop and other considerations, such as improving power quality, may
mean larger cable cross sections need to be used.
WARNING!
The surge protection device should only be installed and connected by li-
censed electricians.
Observe the safety rules!
Prior to all installation and connection work, disconnect the AC and DC sup-
ply to the inverter.
CAUTION!
When connecting the AC and DC cables, make sure that all terminals are
tightened securely using the proper torque.