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

Connecting solar module strings to the inverter (DC)

Safety

Table A
Power category
10.0-3 208–240/12.0-3 208–240/10.0-3 480/12.5-3 480
WARNING! An electric shock can be fatal. Danger from grid voltage and
DC voltage from solar modules that are exposed to light.
- Prior to all connection work, disconnect the AC and DC supply to the inverter.
- Only an authorized electrician is permitted to connect this inverter to the pub-
lic grid.
WARNING! An electric shock can be fatal. Danger from grid voltage and DC volt-
age from solar modules.
- 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.
- All maintenance and service work should only be carried out when the power
stage set has been disconnected from the connection area.
- The separate power stage set area should only be disconnected from the
connection area after first being disconnected from the grid power.
- Maintenance and service work on the inverter power stage set should only
be carried out by Fronius-trained service technicians.
WARNING! An electric shock can be fatal. Inadequately sized electrical compo-
nents can cause serious injury and damage to property.
- 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 Ca-
nadian standards.
- Use min. 194°F (90°C) copper wire for all grounding wires (see NEC table
250.122).
- Voltage drop and other considerations may mean larger cable cross sections
need to be used.
- Use only solid or stranded wire. Do not use fine stranded wire.
WARNING! Work performed incorrectly can cause serious injury and damage.
The overvoltage protection should only be installed and connected by licensed
electricians.
Follow the safety rules!
Before any installation or connection work is carried out, disconnect the AC and
DC supply to the inverter.
CAUTION! Danger of damaging the inverter due to improperly connected termi-
nals. Improperly connected terminals can cause thermal damage to the inverter
and may cause a fire. When connecting the AC and DC cables, make sure that
all terminals are tightened securely using the proper torque.
CAUTION! Overloading the inverter may damage it.
- Observe the maximum current carrying capacity of the various power cate-
gories (see Table A).
- Only connect a maximum of 33 A to each DC terminal.
- Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on
the inverter.
- Observe the maximum DC input voltage.
Current carrying ca-
pacity
25 A/16.5 A
25