Fronius Symo 4.5-3-M Installation Instructions

21
EN
Connecting solar module strings to the inverter (DC
side)
Safety
WARNING!
Danger due to incorrect operation and incorrectly performed work.
This may result in serious injury and damage to property.
► Only qualified staff are authorised to commission your inverter and only within the
scope of the respective technical regulations.
► Read the Installation and Operating Instructions before installing and commissioning
the equipment.
WARNING!
Danger due to grid voltage and DC voltage from solar modules that are exposed to
light.
This may result in an electric shock.
► Ensure that both the AC side and the DC side of the inverter are de-energised before
carrying out any connection work.
► Only an authorised electrical engineer is permitted to connect this equipment to the
public grid.
WARNING!
Danger due to grid voltage and DC voltage from solar modules.
This may result in an electric shock.
► The DC main switch is only to be used to de-energise the power stage set. The con-
nection area is still live when the DC main switch is switched off.
► Ensure that the power stage set and connection area are disconnected from one an-
other before carrying out any maintenance or service tasks.
► The power stage set, which is enclosed in a separate housing, must only be discon-
nected from the connection area when in a de-energized state.
► Maintenance and servicing in the power stage set of the inverter must only be carried
out by Fronius-trained service technicians.
CAUTION!
Danger due to incorrectly tightened terminals.
This may result in heat damage to the inverter, which may lead to fire.
► When connecting AC and DC cables, ensure that all the terminals are tightened to the
specified torque.
CAUTION!
Danger due to overloading.
This may result in damage to the inverter.
► The maximum amperage when connecting to a single DC terminal is 33 A.
► Connect the DC+ and DC- cables to the DC+ and DC- terminals on the inverter, taking
care to ensure that the polarity is correct.
► Observe the maximum DC input voltage.

Fronius Symo 4.5-3-M Specifications

General

Brand	Fronius
Model	Symo 4.5-3-M
Category	Inverter
Language	English