Learn more about the services that you can do online with I-DE with a few clicks away. We work every day to make things easier and simpler for you.Descubre todas las gestiones online que puedes hacer desde la web con i-DE y en muy pocos clics. Trabajamos día a día para ponértelo todo más fácil y sencillo.
Managing without needing to signing up
Discover all the features you can use without signing up that can be very helpful.
Connect to our electrical grid. Learn about the two types of connections to the i-DE network: as a consumer or as a self-consumer/energy producer.Conéctate a nuestra red eléctrica. Infórmate de los dos tipos de conexión a la red de i-DE: como consumidor o como autoconsumidor/productor de energía.
Register for electricity service
Changes in my Electricity Connection
Essencial Electric Supply
Consumption capacity map
Self-consumption Types
Self-consumption Grid Connection
Self-Consumption Set-Up and Billing
Producers Grid Connection
Capacity Map
Generation capacity map
This map shows the available connection capacity for generation.
Check the available connection capacity for consumption.
Access this page and choose the option to be able to know the information about the scheduled outages and faults in the i-DE gridAccede a esta página y elige la opción para poder conocer la información de los cortes programados y averías en la red de i-DE.
View Outages Map
Discover in a simple and fast way if there are outages or scheduled outages on the grid.
Know more about i-DE, the new energy models to adapt to new trends and what actions guarantee safety in our processes.Conoce que es i-DE, los nuevos modelos energéticos para adaptarnos a las nuevas tendencias y qué acciones garantizan la seguridad en nuestros procesos.
Company Overview
Our Commitments To You
Business Plan
i-DE’s investment plans
Results
Digitalization and Innovation
Plain language
Electric Vehicles
Smart Cities
Local Energy Communities
Aerothermics
Safety Grids
Our Assets
Report an Accident
New Rates
Discover how the new electricity rates affect you.
Know more about electric distribution: how it is distributed, infrastructures, what are grids and smart meters, and the legislation of the sector.Todo sobre la distribución eléctrica: cómo se distribuye, infraestructuras, qué son las redes y contadores inteligentes y la legislación del sector.
Electromagnetic fields
Components in the Electrical Grid
Grid codes
Smart Meters
The STAR Project, which involves replacing all analog meters for smart meters.
Discover the latest from i-DE in our News sectionDescubre lo último de i-DE en nuestra sección de Novedades.
Differences between distributor and retailer
Which of the two should you go to for management?
Consejos sobre Ciberseguridad
Qué tipos de estafas y fraudes existen y cómo evitarlas con una buena ciberseguridad.
Private Area
Claims
Access and Connections
Retailers
Suppliers
Producers
DocumentaT
Online Payment
Distributors Map
Electric Power Calculator
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Energy Producers
I need to open a connection file
Outages Map
How to report an electric outage
Scheduled Power Cuts
What is the "ICP" and what is it for
Get to know us
New energy models
Safety and Prevention
How electrical energy is distributed
Smart Grids
Electrical Installations
Electricity sector legislation
Interruptor diferencial superinmunizado
How to Turn on the Electricity in My House for the First Time
How to know, Which is my electricity distributor
What Types of Renewable Energy Exist and What Role Do They Play in Society?
What Is a Transformation Center?
Electricity doesn’t reach homes or businesses directly from power plants. Along the way, it needs to adapt to different voltage levels to ensure safe and stable supply.
This is where electrical transformation centers come into play. These facilities within the distribution system reduce voltage and deliver energy where it’s needed. i-DE explains what a transformation center is, the types, components, and why they are so important in everyday life.
A transformation center (TC) is infrastructure that receives high-voltage energy via 3rd category networks, commonly referred to as medium voltage (typically between 11 and 30 kV), and converts it to low voltage (400/230 V) for use in homes, businesses, public lighting, or small industries. It acts as an intermediate link in the electricity distribution chain, between the transmission network and final consumption.
In urban areas, TCs are often found inside residential buildings, integrated into the structure. In rural or industrial areas, they are usually installed in outdoor or prefabricated enclosures.
Transformation centers can be classified by physical location and ownership.
Indoor
Residential buildings, urban centers
Architectural integration, protection
Ventilation, maintenance access
Outdoor
Industrial, rural
Accessibility, reduced civil works
Weather protetion
Type
Typical Environment
Advantages
Considerations
A prefabricated transformation center is a modular solution built in a factory and ready for installation. Made of concrete or metal, they offer fast setup, minimal civil works impact, and high safety. Commonly used in new developments or rapid network expansion projects.
Ownership defines who is responsible for management and maintenance:
Key components that ensure safety and quality of supply include:
1. Medium Voltage Reception: Energy arrives via MV distribution network. 2. Switching and Protection: MV cells isolate, section, and protect against faults. 3. Transformation: Transformer reduces voltage to 400/230 V (LV) within design limits. 4. Low Voltage Distribution: LV panels distribute energy to various users/services. 5. Monitoring: Protection and metering systems supervise the TC, record consumption, and enable remote control. 6. Delivery to Customer: LV network supplies homes, businesses, and industries, ensuring continuity and quality.
MV/HV installations must comply with current technical and safety regulations (RAT and associated ITCs). LV installations follow REBT. Ownership and maintenance are governed by the transformation center regulations and distributor conditions, including access, ventilation, fire resistance, grounding, and electromagnetic compatibility requirements.
Una subestación eléctrica transforma la electricidad desde Alta Tensión a niveles inferiores también de Alta Tensión y permite interconectar grandes redes. En cambio, un centro de transformación eléctrico opera entre la Media y la Baja Tensión, siendo el último paso antes del consumo.
Un centro de transformación de media tensión requiere revisiones periódicas de los transformadores, verificación de protecciones y limpieza de las instalaciones, siempre con personal cualificado para ello. Estas labores garantizan su correcto funcionamiento y la seguridad de la red.
18 Feb 2025
Depending on the geographical area where your supply point is located, you will be a customer of one distributor or another. This occurs because electricity distribution is a regulated business. In other words, the customer is not free to choose the distribution company, unlike their relationship with the retailer. The retailers are the responsible for selling this energy, and the customer can freely choose with whom to contract it. Electricity distributors play a crucial role: they are responsible for supplying electricity. In other words, they ensure that electricity reaches our homes, businesses, and industries in the best conditions.
Learn More
07 May 2025
Currently, electrical grids are the backbone of the energy system as they connect decentralized energy generation with the end consumer. In this context, distribution substations allow for the transformation, regulation, and distribution of energy safely and efficiently. In this article, we explain what an electrical substation is, how it works, and its main components.
25 Oct 2024
Es muy común que, al hablar de distribuidoras y comercializadoras de energía eléctrica, no sepamos diferenciarlas o no conozcamos qué papel juega cada una. Por eso, te desvelaremos cuáles son sus funciones, sus diferencias, qué gestiones realiza cada una de ellas y a quién acudir en caso de avería.
