Required On Site - VOLTWERK VC 200 Instrucciones De Servicio

2.7.2
Transformerless central inverter
Monitoring the temperature
Each central inverter has several temperature sensors. If a central inverter
is not cooled sufficiently (e.g. due to clogged air inlets or outlets), there
may be a reduction in performance. In the event of a persistent excess
temperature, the central inverter will deactivate. When the device has
cooled down again, it will restart automatically.
Please note:
Insufficient ventilation can damage the device.
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Required on site

External DC disconnector
The DC circuit breakers installed in the device do not meet the
requirements of a disconnector. An external DC disconnector must be
installed upstream of each central inverter. The external DC disconnector
can de-energise the central inverter at the DC side in the event of damage
or for the purposes of checking the solar generator. Please note:
The external DC disconnector must be accessible and easy to reach at
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any time, without aids.
It must be possible to secure the external DC disconnector against
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being switched back on.
Surge voltage protection devices
Depending on the local lightning protection situation, the main low-voltage
distribution board and the DC connection may need to be fitted with type I
or type II arresters. Please note:
A type II arrester is integrated into devices in the levels of performance
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200 kVA and 300 kVA. A type I arrester is integrated into devices in the
level of performance 350 kVA. (see Section "Surge voltage protection
devices", page 18)
External AC disconnector
An external AC disconnector must be installed upstream of each central
inverter. The external AC disconnector can be de-energised, e.g. during
maintenance of the central inverter. Please note:
The external AC disconnector must be accessible and easy to reach at
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any time, without aids.
It must be possible to secure the external AC disconnector against
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being switched back on.
External AC disconnectors must comply with international regulations
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IEC 60364-7-712.
LV HRC disconnectors or AC circuit breakers can satisfy the
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requirements of an AC disconnector.
AC-side fuses
There is no fuse integrated in the central inverter. Therefore, fuses (LV HRC
disconnector) or an AC circuit breaker must be connected between each
central inverter and the medium voltage transformer. The fusing must be
according to the rated current specified on the type plate. The AC cables
are to be dimensioned accordingly.
Operating manual
2 Safety
19