Surge Voltage And Lightning Protection Plan; Medium-Voltage Transformer - VOLTWERK VC 200 Instrucciones De Servicio

4 Installation location
4.3.6
4.4
48
Insulation and earth fault monitoring must be switched in such a way
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that the central inverter is immediately disconnected from the grid
when it is triggered. Grid disconnection options:
Interrupt auxiliary power supply.
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Insert section switch.
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Signal input X21.9: If the device must be switched off quickly,
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assign signal input X21.9 (230 V, 10 mA) (see Chapter 3.7.3,
page 36).
Auxiliary power supply fuse
16 A, type B or similar.
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Surge voltage and lightning protection plan

Material damage due to lightning strike!
A lightning strike in the vicinity of or directly to the photovoltaic system
may damage the system components.
Create a lightning protection plan for all system components (e.g. solar
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generator, inverter, system monitoring).
Put the lightning protection plan into action.
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The risk of surge voltage events and lightning strikes will differ depending
on the location and composition of the photovoltaic system. Please note:
Risk assessment acc. to DIN EN 62305-2
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Statutory and local regulations
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Requirements of the insurer of the photovoltaic system
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Each location and differing system topology (module types, rated voltage,
cable routing, etc.) places different demands on a surge voltage and
lightning protection plan. The manufacturer is not able to produce any
universally applicable specifications to guarantee total protection. Each
photovoltaic system must be evaluated in its own right. Ensure that you
have the required specialist knowledge or contact an expert.

Medium-voltage transformer

The central inverters are designed for direct grid connection to a medium-
voltage transformer. They are central inverters without integrated
transformers and thus without galvanic isolation between the solar
generator and the electricity grid. Galvanic isolation is provided
exclusively by the medium voltage transformer.
For each central inverter, use one medium voltage transformer or a
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shared transformer with galvanically isolated low-voltage windings.
If you are using a transformer without isolated low-voltage windings, you
can connect up to a maximum of 4 central inverters. Please note:
Solar generator must not be earthed.
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If you earth the solar generator, each central inverter must have a separate
medium voltage transformer or its own low-voltage winding.
Operating manual
Transformerless central inverter