E VDE-AR-N 4100 Anwendungsregel:2024-10

The VDE application rule ‘Connection and operation of customer installations on the low-voltage grid (TAR NS)’ specifies the general minimum technical requirements that apply to the planning, installation, connection and operation of electrical installations on the distribution system operator's low-voltage grid.
The general minimum technical requirements for the grid connection include grid connection principles, definition and design of necessary equipment as well as grid and system protection concepts. The general minimum technical requirements for operation include specifications on the behaviour of supply systems on the low-voltage grid with regard to grid security and system stability in the grid network.
The TAR NS describes the general minimum technical requirements (here: for connection and operation on the low-voltage grid) for the low-voltage level in accordance with Section 19 (4) EnWG, which the German Association for Electrical, Electronic & Information Technologies (Verband der Elektrotechnik Elektronik Informationstechnik e. V.) has adopted as the authorised body. This ‘Grid Code for Load Connection’ (§ 19 Para. 4 No. 2 EnWG) is incorporated into the grid connection contract via the technical connection conditions (TAB) in accordance with § 19 Para. 1 EnWG. Requirements in the technical connection conditions that contradict the general minimum technical requirements are invalid.