FZK, DZK, bFZK –
our capacity products
Various capacity products are available for selection. They differ based on their technical and physical properties. The availability of the capacity products at the various network points in the ONTRAS network can be found in the Transparency Tool. ONTRAS offers the following capacity products:
Freely allocable capacity (FZK)
Freely allocable capacity allows you to reach the virtual trading point in the Trading Hub Europe market area, without restriction, from any entry or exit point.
Dynamically allocable capacity (DZK)
Dynamically allocable capacity enables network access between different network points on a firm basis. The energy quantity of the gas fed in and out at the defined network points must coincide every hour, otherwise the capacity can only be used on an interruptible basis. The transport customer is obliged to inform ONTRAS, by email to email@example.com, of the balancing group or sub-balancing account that will be used for the dynamically allocable entry/exit capacity. Further details on the DZK capacity type can be found in our network access conditions.
Conditional firm freely allocable capacity (bFZK)
The bFZK booking (conditional firm freely allocable capacity) enables capacity utilisation on a firm or interruptible basis in the ONTRAS network area depending on certain temperature conditions. The split between the firm and interruptible share is specified by a defined temperature curve, which can be found in the download area.
ONTRAS currently offers this type of capacity at the UGS Peckensen, UGS Allmenhausen, UGS Staßfurt and VGS Storage Hub storage points. bFZK must be selected on PRISMA to book this product. Further details can be found in our Supplementary Terms and Conditions.
Interruptible capacities enable access to the virtual trading point in the Trading Hub Europe market area, provided that the network point is not fully utilised by transport customers with firm capacities. Further regulations on interrupting interruptible capacities are provided in our network access conditions.