Connection to the medium-voltage grid
If you are looking to connect a private transfer station to the medium-voltage grid in Berlin on behalf of your company or large commercial enterprise, or are planning to make alterations to an existing transfer station, then you have come to the right place to find the information you need.
You require a high connected capacity for your business or trade. Whether you are looking to construct a private transfer station with a connection to our medium-voltage grid out of necessity or because it would be useful, we would be happy to coordinate with you.
Making alterations to a connection
You already operate a transfer station and would like to make alterations to your private plant (e.g. an extension) or you need to adapt your connected capacity.
Removing a connection
You want to put your transfer station out of operation and have the connection removed. We will issue you with a quote for disconnecting the connection from our grid.
Information and documents
Submit a connection request
Before we can consider a transfer station connection request, we require the following information:
- expected power requirements* (net output),
- a scaled site plan that includes the local position of the property to be connected: If you already have a suggested location for your transfer station, include this on the site plan along with the desired cable route through the property or building.
- Data pertaining to the transfer station's owner and future power recipient*
* To do so, please use forms "D1 - request for grid connections" and "D2 - data sheet for assessment of system perturbations":
Please send your request by post:
Stromnetz Berlin GmbH
Netzvertrieb – Netzanschluss
or by email to firstname.lastname@example.org.
Once the boundary conditions (including power requirements, location of the planned customer-owned transfer station and the cable route through the customer property) have been clarified, we will provide you with an individual quote for establishing a connection between your transfer station and our medium-voltage grid.
The quote also sets out the connection costs for the connection to our medium-voltage grid and a contribution to building costs.
The contribution to building costs is in line with the recommendations made by the Federal Network Agency. To establish this fee, the published unit price of the access grid level in force when the contract was concluded or adapted is multiplied by the contractually agreed provision of power:
Contribution to building costs = Annual unit price (≥ 2,500 h/a) of the grid level x appointed power (kVA)
- Federal Network Agency position paper on charging contributions to building costs for grid connections in the area of grid levels above low-voltage (BK 6p-06-003 dated 05/01/2009) (PDF 44 kB)
- 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.
Price sheet reactive energy
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.
Basic legal regulations
The establishment or extension of grid connections in the medium-voltage and high-voltage grids is carried out in accordance with Section 17 of the EnWG in conjunction with our "General specifications and technical requirements for grid connections and connection usage in the medium-voltage and high-voltage grids."
Along with the quote for your connection to the medium-voltage grid, you will also receive one of the following versions of the grid connection contract:
1. If you use the connection yourself, you will receive a contract which regulates both the grid connection and connection usage
2. If your connection is used by a third-party, you, the power recipient,
- will receive a grid connection contract
sample copy of grid connection contract (PDF 67 kB)
- and the connection user will receive a connection usage contract
sample copy of connection usage contract (PDF 61 kB)
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 (PDF 147 kB)
- Property boundary (only applies to the grid connection contract and the combined grid connection/connection usage contract): Property boundary cable termination (PDF 58 kB)
Historically, in the case of existing connections, the following property boundaries are also conditionally available:
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 technical requirements are to be taken into account when planning, constructing, connecting and operating customer systems connected to the medium-voltage grid.
You will find further Information at installer documentation by "Medium voltage grid Connection documentation"
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.
Overview of approved equipment:
The following manufacturers currently have permission to install approved switchgears in Berlin's medium-voltage grid:
Carrying out electrical installation work
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.
Connection of a station for providing power to a construction site
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:
If you require a temporary connected capacity greater than 630 kVA, our technical requirements apply.
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 transfer station 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.
Connection of standby generators
The following guidelines apply to the connection and operation of standby generators
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