Planning the electrical installation 73
Planning the electrical
installation
Contents of this chapter
This chapter contains the instructions that you must obey when selecting the cables,
transformer, protections, cable routing and way of operation for the inverter system.
Limitation of liability
The installation must always be designed and made according to applicable local laws and
regulations. ABB does not assume any liability whatsoever for any installation which
breaches the local laws and/or other regulations. Furthermore, if the recommendations
given by ABB are not followed, the inverter may experience problems that the warranty
does not cover.
Selecting the transformer
Transformers designed for photovoltaic applications are available from ABB. Each inverter
must be galvanically isolated from other inverters and medium and low voltage network by
a dedicated transformer or winding. If you intend to connect inverters in parallel, please
contact ABB for more information. ABB recommends a transformer designed for the
environment where it will be installed, compliance with power transformer standard IEC
60076 and testing according to converter transformer standard for industrial applications
IEC 61378-1. Country-specific requirements must always be fulfilled.
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