Substation for photovoltaic applications with central inverters

Step-up substation for photovoltaic power plants up to 5.5 MVA to 36 KV “Step-up station”.

Technical description

This step-up substation for photovoltaic power plants is intended for high power photovoltaic plants to increase voltage and connect to the delivery station. It is strongly recommended for plants at 20 MWp and above with central inverters. It consists of a container enclosure for easy installation on photovoltaic fields that are often difficult to access.

The HELIOS CI substation for photovoltaic applications can integrate:

  • One LV/MV step-up transformer up to 5500 KVA 36 KV double winding with reduced losses ECO DESIGN 2021 for optimal solar production efficiency
  • One state-of-the-art, compact, maintenance-free and hermetically tight SIEMENS MV switchgear type 8DJH 24 kV – 36 kV 630 A in compliance with IEC 62271
  • Latest generation protector relay to protect the transformer
  • One or two high power central inverters up to 1500 VDC
  • One auxiliaries box powered by a LV/LV dry-type transformer
  • One C13-100 box to power the control, motorisation and supervision equipment in the event of a power cut
  • One information pooling cabinet to facilitate implementation of the client SCADA
  • HVAC unit or system for the HV room
  • A set of safety accessories up to 36 kV

Key points

  • “Plug and Power” Mounted – Wired
  • Protection class IP54 with C5M container paint
  • Insensitive to harsh environments
  • Opening of the inverter room with protective screen for optimal cooling
  • High transformer efficiency according to EU 548/2014 – ECO DESIGN 2021

Logistical information

  • Incoterms: FCA France or CIF seaport
  • Origin : France
  • Customs code: 85372091

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Safety standards & certifications


    on high voltage electrical installations


    on low-voltage electrical installations

    NE EN 62271-202

    on MV/LV prefabricated substations


    for quality management

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