Cabling Length; Photovoltaic Panels; External Disconnection Device; Medium Voltage Transformer - Ingeteam 160TL Installation And Operation Manual

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5.6. Cabling length

The inverter measures the voltage in its connection terminals. For this reason, the installer must use an AC cable
with a sufficiently low impedance so that increasing the voltage in the cable (between the distribution transformers
and the unit) does not cause the unit to be disconnected due to high voltage.

5.7. Photovoltaic panels

Standard IEC 62109 defines this inverter as a stand-alone inverter, and therefore the photovoltaic modules used
with it must be class A according to IEC 61730.
The stray capacity of the PV array must always be lower than:
• 11.3 μF if it is connected to a 50 Hz grid.
• 9.4 μF if it is connected to a 60 Hz grid.
The inverter cannot operate with grounded PV arrays; the PV array must be isolated.
The stray capacity depends mainly on two factors:
• Installation factors (structure, ceiling, etc.), inclination, manufacture of the photovoltaic module, type of
module.
• Environmental factors: humidity, rain, etc.
The installer is responsible for ensuring that the PV array does not exceed these limits, to ensure the correct
operation of the inverter.
If said levels are exceeded, the inverter may stop due to the limit of rms residual current established by regulation
IEC 62109.

5.8. External disconnection device

The DC and AC supply must be shut off for equipment inspection work. To do this, the installer must fit an external
disconnection device.

5.9. Medium voltage transformer

In installations where the use of a Medium Voltage transformer dedicated to the inverters is required, this
transformer must meet the following requirements:
• The transformer must have a rated power equal to or greater than the sum of the power of the inverters
installed downstream.
• The transformer must have a star configuration in the low-voltage side and a delta configuration in the
high-voltage side.
• It is recommended to use transformers with Ucc <6%.
• It is recommended to use transformers equipped with five-point voltage regulators (0, ±2.5, ±5%).
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ABZ2011IQM01_F - Installation and Operation Manual
Preparation for installing the unit