Facilities that are connected to our UFD, S.A. electricity grid must meet a series of technical specifications which are set out in the following regulations.

Particular specifications

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Technical requirements to connect high-voltage installations of Un > 36 kV

The document specifies the technical requirements to be met by installations to be connected to High Voltage networks of Un > 36 kV as well as other parts of the connection installation that for reasons of safety, reliability and service quality must meet the aforesaid conditions (document available in Spanish).

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Technical requirements to connect high-voltage installations of Un ≤ 36 kV

The document specifies the technical requirements to be met by installations to be connected to High Voltage networks of Un ≤ 36 kV as well as other parts of the connection installation that for reasons of safety, reliability and service quality must meet the aforesaid conditions (document available in Spanish).

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Particular Specifications for Connection Installations. Low Voltage Connection Installations

The document defines and regulates the technical characteristics to be met by new Low Voltage connection installations to be connected to the distribution network (document available in Spanish).

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Particular Specifications for Connection Installations. Generators connected to Low Voltage networks

The document defines the technical conditions and characteristics required to connect generators to the Low Voltage network (document available in Spanish).

Royal Decree 1663/2000 has been revoked by the single repealing provision of Royal Decree 1699/2011, of 18 November, published in the BOE of 8 December 2011.

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Particular Specifications for Connection Installations. Lines connected to High Voltage networks of Un > 20 kV

The document specifies the conditions and characteristics to be met by new network extension electricity lines connected to High Voltage networks of Un > 20 kV and for other parts of the connection installation that for reasons of safety, reliability and service quality are required to meet the aforesaid conditions (document available in Spanish).

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Particular Specifications. Technical Requirements for the Construction of Substations connected to High Voltage networks of Un > 36 kV

The document specifies the conditions and characteristics to be met by new network extension electricity substations connected to High Voltage networks of Un > 36 kV (document available in Spanish).

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Particular Specifications for Energy Measuring Installations in networks of Un <= 20kV

The document sets out the technical conditions to be met by the elements comprising the electricity measuring equipment used for billing and payments in Low Voltage supplies to customers and High Voltage supplies of Un <= 20 kV (document available in Spanish).

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Individual specifications for Energy Measurement installations on networks of Un >= 45kV or located at UFD Substations

The document defines and regulates the technical characteristics to be met by new Low Voltage connection installations to be connected to the distribution network (document available in Spanish).

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Particular Specifications for Connection Installations. Carrying out Measurements and Tests on Underground Lines before rolling out.

The purpose of this document is to establish the technical requirements for carrying out measurements and tests on underground lines. The aim is to guarantee a level of reliability and a quality that ensures they operate correctly in the distribution network (document available in Spanish).

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Low Voltage Overhead Power Line Project

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of Low Voltage Overhead Power Lines, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Overhead Power Line Projects up to 20kV

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of High Voltage Overhead Power Lines of Un <= 20 kV, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Low Voltage Underground Power Line Project

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of Low Voltage Underground Power Lines, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Underground Power Line Projects up to 20kV

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of High Voltage Underground Power Lines of Un <= 20 kV, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Project for the construction of Outdoor Stations

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of Outdoor Distribution Transformer Stations, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Project for the construction of Transformer Stations in prefabricated and non-prefabricated enclosures

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of Distribution Transformer Stations in a prefabricated and non-prefabricated enclosure, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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Project for the construction of distribution stations in prefabricated and non-prefabricated enclosures

The document establishes and justifies all the construction data that enables the undertaking of projects and the subsequent construction of Distribution Stations in a prefabricated and non-prefabricated enclosure, as provided for in current norms and regulations and in compliance with the company’s standards (document available in Spanish).

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