The infrastructures included were:

• Medium-voltage centres for inter-connection with CHILECTRA.
• Interior underground transformer centres with their associated power transformers.
• Client’s medium-voltage network for inter-connection with transformer centres.
• Emergency backup power supplies for critical services associated with each transformer centre, with generators and UPS.
• Low-voltage technical rooms associated with each transformer centre, for installing switchboards, distribution boards, UPS, generators and associated ancillary items. Definition of surface areas, volumes, overburdens to consider on roofs, etc.

• Electrical switchboards and distribution to receivers and low-voltage receivers (660/380/220V).
• Low-voltage power supply boards for safety, security and control services.
• Electrical cabling from technical rooms to receivers, with underground duct banks, boxes, overhead pipes, electrical cable trays and junction boxes.
• Low-voltage power cables to supply 660 V (or the voltage required) fan systems.
• Low-voltage power cables to supply other ancillary equipment at 380/220V.
• Medium and low-voltage earth system.
• Ancillary lighting, power and ventilation services in transformer centres and technical rooms with boards and equipment.