Connection in medium or high voltage

An overview of the process and the requirements for establishing a new medium-voltage connection in an openly operated medium-voltage ring can be found in the information sheet on connecting customer systems to an openly operated medium-voltage ring.

Information on submitting an application

Grid connection: open 10 kV ring, with a reference power of up to 800 kVA and one transformer
Please apply for a new medium-voltage grid connection to an open 10 kV ring with a reference power of up to 800 kVA and one transformer via our customer portal. Registration is required to apply via the customer portal. The necessary data for the application is also recorded/documented in our customer portal.

Grid connection with a contracted power of more than 800 kVA and more than one transformer Please submit applications for a new medium-voltage grid connection with a contracted power of more than 800 kVA and more than one transformer, as well as for modifications to existing medium-voltage connections, by email. Please use the email address provided below.

Grid connection with a power requirement > 3.5 MVA
For a grid connection with a power requirement of more than 3.5 MVA, participation in our allocation procedure is mandatory.

Application documents

We require for the establish or a change of a connection:

• Power of attorney from the owner (if the owner and the account holder are not the same person, a power of attorney from the account holder is also required)
• the completed forms E.1, E.2 and possibly E.8 of the VDE-AR-N 4110
• the expected power requirement (net output); if your information on the desired contract power is given in kW (active power), we will equate this to kVA (apparent power) – unless you provide us with the apparent power value or the displacement factor cosϕ
• a site plan to scale (1:500) showing the location of the plot to be connected. If you already have a proposed location for your handover point, please mark this and the desired cable route on the plot or within the building on the site plan,
• information on the field, parcel, district and the property owner and leaseholder.
• Technical requirements for medium voltage grid – forms from appendix E of VDE-AR-N 4110

Dismantling grid connection

To decommission your transfer station and subsequently dismantle the medium-voltage connection, please send the completed Form E.1 of VDE-AR-N 4110 to the post office box address given below.

form E.1 of the VDE-AR-N 4110.

Delivery

If your enquiry cannot be submitted via the customer portal, please send it by email to [email protected].

^{All documents in German language only.}

We offer you a connection installation contract for the connection to the medium-voltage grid.

For the use of your connection, you will receive

• as the connection owner a grid connection contract
  sample copy of grid connection contract
• as the connection user a connection usage contract
  sample copy of connection usage contract

If you use your connection yourself, you will receive a grid connection contract and a connection usage contract.

The contract also contains the following attachments:

• General specifications and technical requirements for grid connections and connection usage in the medium-voltage and high-voltage grids
• Property boundary (only applies to the grid connection contract and the combined grid connection/connection usage contract):
  Property boundary measuring field

Historically, in the case of existing connections, the following property boundaries are also conditionally available:

• Property boundary cable termination
• Property boundary bus bar branch
• Property boundary transfer control panel

Note: Further explanations regarding terms such as power recipient, connection user, grid connection contract and connection usage contract can be found in our glossary.

The set up or change of connections in the medium- and high-voltage grid takes place after 17 EnWG in connection with our „General and technical conditions for connection and connection use in the medium- and high-voltage grid“.

^{All documents in German language only.}

The technical requirements are to be taken into account when planning, constructing, connecting and operating customer systems connected to the medium-voltage grid.

Technical requirements for medium voltage grid, version 2025, valid from 01.07.2025

Technical requirements for medium voltage grid connections (TA-MS), version 2025 - valid from 01.07.2025

Appendices

Appendix 1 - Rated value
Appendix 2 - Connection principles
Appendix 4 - Measuring transformer
Appendix 5 - TAR 4110 Forms
Appendix 6 - Checklists

TB3304 - Cable conduit ditches customer property
TB3312 - Medium-voltage switchgear in customer and grid stations
TB3340 - Remote control of network and customer stations in the medium voltage grid
TB3350 - Compact grid stations
TB3351 - Assembly compact grid stations
TB3354 - Rooms for grid and customer grid stations
TB3371 - Electrical grounding
VN37 - Electrical grounding

Technical requirements measuring device
Technical requirements for grid security management, valid from 01.09.2025

Pictures

Picture 1.1 Connection to an open 10 kV ring and a transformer ≤ 800 kVA
Picture 1.3 Connection to an open 10 kV ring and a transformer > 800 kVA
Picture 1.5 Connection to an open 10 kV ring and with several outgoing feeders
Picture 1.6 Connection to an open 10 kV ring transfer ≤ 800 kVA, with generator set ≤ 600 A
Picture 1.7 Connection to an open 10 kV ring transfer > 800 kVA, with generator set ≤ 600 A
Picture 1.8 Connection to an open 10 kV ring, transfer with several switch panels and generator set ≤ 600 A
Picture 1.9 Connection to a closed 10 kV ring (side feed)
Picture 1.10 Connection to a closed 10 kV ring (centre feed)
Picture 1.11 Connection with tap connection and generator sets
Picture 2.1 Wiring specifications for protection technology
Picture 2.2 Wiring specifications for metering
Picture 2.3 Open ring metering panel
Picture 2.4 Closed ring metering panel

Additional documentation

Technical guideline for electricity stations used on construction sites 2009

^{All documents in German language only.}

Manufacturers of medium-voltage switch gears that are permitted to be installed in the distribution grid receive a corresponding certificate of approval from us before they are installed. If equipment from other manufacturers is installed, it must be checked and approved by the Distribution System Operator before use.

For information on approved equipment, please contact your personal representative here or send an email to [email protected].

As a Distribution System Operator, we keep a directory that contains a register of electricians who are permitted to construct, expand, alter or maintain the systems on our distribution grid. When choosing your electrician, please ensure that he or she is registered in our directory and has the necessary credentials.

The following guidelines apply to temporary connections and to the operation of a customer-owned station for providing power to a construction site with a transformer of up to 630 kVA:

Technical guidelines for stations for providing power to a construction site 2009

If you require a temporary connected capacity greater than 630 kVA, our technical requirements apply. You will find the documents at 'Technical documents'

The application, planning and commissioning procedures and practices for stations for providing power to a construction site are identical to those that apply to an application for a new medium-voltage connection.

At the moment, the individual connection costs are the only charge that applies to the connection of a station for providing power to a construction site. The connection of a station for providing power to a construction site does not currently require the customer to make a contribution towards building costs.

^{All documents in German language only.}

VDE-AR-N 4110 applies to the connection and operation of standby generators.

To establish or change a connection, we need:

• the completed forms E.1, E.2 and, if applicable, E.6 of VDE-AR-N 4120,
• a true-to-scale site plan in accordance with form E.4 of VDE-AR-N 4120,
• an overview circuit diagram according to form E.4 of VDE-AR-N 4120,
• the expected power requirement (power balance).

For the decommissioning of your substation and dismantling of the connection, please send us the completed form E.1 of the VDE-AR-N 4120.

Please send your request via email to [email protected].

TAR Hochspannung – forms from appendix E of VDE AR N 4120

Further information

Since 1 January 2015, the VDE-AR-N 4120 has replaced the Transmission Code 2007 as well as the VDN guideline "Renewable Energy Power Plants on the High-voltage Network" (EEG-Anlagen am Hoch- und Höchstspannungsnetz) for 110 kV grid connections..

Information of the VDE on the topic of high-voltage connection

Note

Since May 2016, the "Commission Regulation (EU) 2016/631 of 14 April 2016 establishing a network code on requirements for grid connection of Generators" has applied. At present, this is being transposed into national law by the relevant bodies, such as the VDE-FNN, and we expect an amendment to the technical connection regulations (TAR).^*

^{* The VDE-AR-N 4120 forms part of the VDE regulations and can be purchased from VDE Verlag GmbH.}

^{All documents in German language only.}

For planning, set-up, operation of and changes to customer installations (transformer stations and generation facilities) on the 110 kV high-voltage grid in Berlin, the technical requirements for the connection to the high-voltage grid (VDE-AR-N 4120^*) as well as the supplementary Berlin-specific technical requirements for connection to the high-voltage grid in Berlin, apply.

Technical requirements for connection to the high-voltage grid in Berlin 2024 - valid from 01.11.2024

Technical requirements for connection to the high-voltage grid in Berlin 2024 - valid from 01.11.2024, Status June 2026

Technical requirements high-voltage Berlin 2024 appendix 1 - rating

Technical requirements high-voltage Berlin 2024 appendix 2 - technical data

Technical requirements high-voltage Berlin 2024 appendix 3 - process data

Technical requirements high-voltage Berlin 2024 appendix 4 - customer installation with regenerative generation

Technical requirements high-voltage Berlin 2024 appendix 5 - forms VDE-AR-N 4120 appendix E

Technical requirements high-voltage Berlin 2024 picture primary concept 6580.1 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture primary concept 6580.2 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture primary concept 6580.3 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture primary concept 6580.4 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture protection concept 6588.1 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture protection concept 6588.2 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture protection concept 6588.3 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture protection concept 6588.4 (Status June 2026)

Technical requirements high-voltage Berlin 2024 picture auxiliary power and control technology concept 6655.1

Technical requirements high-voltage Berlin 2024 picture auxiliary power and control technology concept 6655.2

Technical requirements high-voltage Berlin 2024 picture auxiliary power and control technology concept 6655.3 (Status 30.06.2025)

Technical requirements high-voltage Berlin 2024 picture auxiliary power and control technology concept 6655.4 (Status 30.06.2025)

^{* The VDE-AR-N 4120 forms part of the VDE regulations and can be purchased from VDE Verlag GmbH.}

^{All documents in German language only.}

Applicants for a grid connection request in accordance with the Power Station Grid Connection Ordinance (Kraftwerksnetzanschlussverordnung - KraftNAV) also use the documents from our requirements for connection to the high-voltage grid in Berlin.

Once the boundary conditions have been clarified, we will provide you with an individual quote for establishing a connection to our high- or medium-voltage grid.
The quote also sets out the connection costs for the connection to our grid and a construction cost subsidy.

The construction cost subsidy is levied in accordance with the Federal Network Agency's “Position Paper on the Levying of Construction Cost Subsidies.” It is calculated as the product of the arithmetic mean of the power prices over the last five years and the contractually agreed power.

Construction cost subsidy = arithmetic mean of the power prices over 5 years (≥ 2,500 h/a) of the grid level × ordered power (kVA) Translated with DeepL.com (free version)

• Price sheet construction cost subsidy
• Federal Network Agency position paper on construction costs subsidies
• Price sheets of grid usage fees

Note: Some connection versions and additional actions may entail extra costs which you must bear in addition to the costs of a regular connection.

When withdrawal electrical energy, a displacement factor (cos phi) between 0.9 inductive and 1 must always be observed. If this is not the case, no reactive work is calculated according to the following price sheets.

Price sheet reactive energy 2018

^{All document in German language only.}