R3 Note Series
User Manual
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R3 Note Series
User Manual
1.2 Applied designations
1. Introduction
This manual describes solar inverters
：
R3-4K-DT/R3-5K-DT /R3-6K-DT/R3-8K-DT/R3-10K-DT/R3-12K-DT/R3-15K-DT.
These inverters are transformerless based inverter.
Please read the safety instructions in this manual first. Throughout the manual it is assumed that the reader is familiar with
AC and DC installations and knows the rules and regulations for electrical equipment and for connecting it to the utility AC
grid. It is especially important to be familiar with the general safety rules for working with electrical equipment.
Throughout the manual important information is shown at different levels depending on the character of the information, as
shown here:
1.3 Important safety information
Read this before installing, operating or maintaining the inverter.
1.4 System sizing
1.1 Introduction
Safety information important for human safety. Violation of warnings may
result in injury to persons or death.
Danger of high voltage and electric shock!
Signals danger due to electrical shock and indicates the time (5 minutes)
to allow after the inverter has been turned off and disconnected to ensure
safety in any installation operation.
Danger of hot surface!
Product should not be disposed as normal household waste.
CE Mark
ROHS Mark
Information important for the protection of property. Violation of this type
of information may cause damage and loss of property.
Useful additional information or “Tips and Tricks” on specific subjects.
When dimensioning a photovoltaic system, it must be ensured that the open
circuit voltage of the PV string never exceeds the maximum permissible
input voltage of 1000V DC. The PV string open circuit voltage during parallel
string operation is 950V. Higher voltages may result in permanent damage
to the inverter.
Before installation:
Check for damage to inverter and packaging. If you are in doubt, please contact your supplier
before installing the inverter. Check the voltages of the solar modules and make sure they are
within the limits of the inverter specifications before connecting them to the inverter.
Installation:
Only trained and authorized personnel familiar with local electrical codes may install the inverter.
For optimum safety, please follow the steps described in this manual. Keep in mind that the
inverter has two voltage carrying sides, the PV input and the AC grid.
Disconnecting the inverter:
Always disconnect the AC line first! Afterwards disconnect the PV lines. Note that the inverter
can still be charged with very high voltages at hazardous levels even when it is disconnected
from grid and solar modules. Wait at least 5 min. before proceeding, after having disconnected
from grid and PV panels.
Operating the inverter:
Before connecting the AC grid to the inverter, make sure that the installation cover is mounted
again. The inverter must not be open during operation.
Maintenance and modification:
Only authorized personnel are allowed to repair or modify the inverter. To ensure optimum
safety for user and environment, only the original spare parts available from your supplier
should be used.
Functional safety parameters:
Unauthorized changes of functional safety parameters may cause injury or accidents to people
or inverter. Additionally it will lead to the cancelling of all inverter operating approval certificates.
