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Below you will find the answers to the most frequently asked questions to ONTRAS by their shippers. For further questions please do not hesitate to contact us personally.

Capacity booking

What are the preconditions for capacity bookings with ONTRAS?

Before booking capacities in the ONTRAS grid it is necessary to:

1. register on PRISMA

2. conclude a balancing group contract with GASPOOL

3. send ONTRAS the balancing group

4. send ONTRAS the documents necessary for registration

6. perform a successful communication test

7. book capacity on PRISMA and include it into a balancing group


How do you register for bookings in the ONTRAS grid?

You can register at PRISMA for ONTRAS. After online registration you receive the respective documents which you have to fill in and send back, signed, to ONTRAS via email. After successful validation of the documents you will receive your login data.

Which documents are necessary for registration?

The following documents are requested duly filled in and signed:

- PRISMA-Registrations documents (automatically transferred by PRISMA)
- Proof of authority to act on behalf of the company and audited annual financial statements according to section 2a of our GTCT for the Entry and Exit contract
- Data sheet bank details and tax ID  
- Data sheet Inclusion of points into Balancing Groups with the Market Area GASPOOL


When do the auctions for firm capacities at market area and cross border connection points take place?

How do you acquire capacities at the network point where the capacity allocation process is not an auction process?

Firm and interruptible capacities at grid points which are not a market area or cross border connection point or storage points (industrial customers, production and biogas facilities) are marketed via first-come-first-served (FCFS). At connection points to industrial customers, production and biogas facilities bookings are possible up to 1 hour before the beginning of the contract.

Are capacities by ONTRAS offered as bundled capacities?

ONTRAS bundles all firm capacities at market area and cross border connection points according to NC CAM except at the GCP GAZ-SYSTEM/ONTRAS. Interruptible capacities are not bundled by ONTRAS.

What is the definition of the DZK capacity at Deutschneudorf Exit and what is the price for this?

ONTRAS offers firm dynamically allocable capacities (DZK) at the point Deutschneudorf for the flow direction exit. If the expected entry pressure of the pipeline 301 in the ONTRAS grid for the following gas business day is at least 65 bar, the use of DZK on a firm freely allocable basis is possible.
The price for DZK capacities at Deutschneudorf is 93 % of the fee for firm capacities.

For further information please use section 7 of the Supplementary Terms and Conditions of Trade of ONTRAS.

Where do you find information about capacities and flows in the ONTRAS grid?

Free capacities as well as nominations and bookings are published on the transparency tool of ONTRAS.

Can interruptible capacities be converted into firm?

Interruptible capacities or capacities with interruptible parts can been upgraded into firm capacities or capacities with less interruptible parts during the bid submission in the auction process on PRISMA.

Can unbundled capacities been converted into bundled capacities?

At interconnection points unbundled capacities with a duration of a month or more can been converted into bundled capacities during the auction. The conversion functionality on PRISMA can be used for this.

Does ONTRAS offer competing capacities?

No, there are no competing auctions for the ONTRAS grid.

What is the emergency process if bookings on PRISMA are not possible?

Capacities can be requested via form or mail to capacityontrascom and dispositionontrascom if PRISMA is not available. The capacity allocations occur on the best ability of the transmission system operator but without any guarantee. The requests for capacities have to submit until 6 p.m. on the gas business day before the planned gas transport.

At which network point are firm Within-Day capacities offered?

Within-Day capacities are marketed at all bookable point in the ONTRAS grid. These are cross border and market area connection points, connection points to industrial customers, storage points, production and biogas facilities.

Are Within-Day capacities available for the current gas business day?

The capacity booking for the current gas day are possible at all bookable points. 

Which lead time has to be considered for Within-Day bookings?

A lead-time of 4 hours has to be considered at cross border and market area connection points. At storage points, the lead-time is 3 hours and at connection points to industrial customers, production and biogas facilities there is a lead-time of 1 hour. 

What is the price for Within-Day capacities?

The price for Within-Day capacities is the daily fee multiplied by the short-term factor 1.4 in proportion to the yearly fee according to BEATE.

How are over-nominations and capacity overruns charged?

  • Network point not fully booked (firm) and customer nominates more than booked - capacity overrun
  • Capacity overrun: Regular daily charge (including the short-term multiplier) for the overrun amount plus three times the daily charge for the difference between the used capacities and the included capacities in a balancing group (based on Sec. 11 GT&C)
  • Network point fully booked (firm) and customer nominates more than booked - Within-Day overnomination
  • Within-Day overnomination: Daily charge for interruptible capacities (including the short-term multiplier)
  • Network point fully booked (firm) during the day and customer nominates more than booked 
    - capacity overrun when network point is not fully booked
    - Within-Day overnomination when network point is fully booked
  • Capacity overrun: Regular daily charge (including the short-term multiplier) for the overrun amount plus three times the daily charge for the difference between the used capacities and the included capacities in a balancing group (based on Sec. 11 GT&C)
    + Within-Day overnomination: Daily charge for interruptible capacities



How is the customer informed about the possibility to over-nominate?

The information about free firm capacities is published in the transparency tool on the ONTRAS website as well as on PRISMA.

What is the lead time for over-nomination?

The lead time for over-nomination is two hours.

Is the inclusion of the booked point into a balancing group required?

For an over-nomination the following preconditions need to be considered:
Firm capacities at the network point are fully booked,
the grid point that you would like to over-nominate needs to be included into a balancing group in the relevant direction.

When is over-nomination possible?

Only when the network point is fully booked, over-nomination is possible after the Day-Ahead auction.

What if a customer sends an over-nomination and then sends a renomination reducing the values down to zero more than two hours before the first transport hour?

With submission of an over-nomination at a fully booked network point, a capacity contract will be concluded. A renominiation does not affect this capacity contract.

Where is the current price list published?

The latest price list is published in the download area on ONTRAS website. 

Do the fees for long term bookings retrospectively change once new tariffs are published?

When new fees come into force, these new fees are also applicable to existing bookings.
In accordance with Sec. 25 para 4 of the GT&Cs, ONTRAS grants to the customer the right to terminate the existing capacity contract if it is affected by this adjustment.

Are secondary trades affected by the BEATE regulation?

With the assignment of secondary deals the short term multipliers are applicable. For example, if a quarterly product is bought via secondary trade out of a yearly contract, the multiplier of 1.1 will be applied for the quarterly product. The original yearly contract still has the multiplier of 1.

Due to the contractual relationship between the shipper and the transmission system operator, the short term multiplier does not apply for transfer of use.


What are the preconditions for nomination?

Nominations are possible after a successful communication test. This includes an agreement on the message format and the communication path. Successful nomination processing requires capacities in the balancing group.

How long does it take to successfully implement a communication link?

The implementation of the communication connection can take up to 10 working days.

Which formats does ONTRAS offer for nomination?

ONTRAS offers the following nominationformats:

Edigas XML (in accordance with the current version, which is published on
Edifact (in accordance with the current version, which is published on

Which communication paths does ONTRAS offer?

The following communication paths are used by ONTRAS:

AS2 (until 01.02.2018)

Which network point ID can be used in the nomination?

The following network point IDs can be used:

IDs published on PRISMA
A bilateral agreement is also possible

At which points are nominations required?

Nominations are necessary for all market area and cross border points as well as network points to strage facilities.

Where can you find the ID of the network point?

The network point ID is published on following pages:


Which role has ONTRAS in the single-sided nomination process?

ONTRAS is the active TSO at all interconnection points.

How to get the information regarding the renomination restriction?

ONTRAS sends a CHACAP message at the request of the balancing group manager.

What is the emergency process, if the standard communication path fails?

If the standard communication path fails, the nomination can be carried out via nomination portal or in coordination with the dispatching center.

What is the lead time for nominations?

The nomination can be carried out with a lead time of two hours to the next full hour.

Are Day-Ahead and Within-Day capacities subject to a re-nomination restriction?

There are no renomination restrictions for Day-Ahead and Within-Day capacities according to KARLA 1.1.

Invoicing and technical quantity evaluation

Is it possible to view billing data in the ONTRAS-portal? 
ONTRAS offers the possibility to view the billing data in the password-protected area of the portal. After the successful registration in the ONTRAS portal, it is possible to view, to download or subscribe to the time series and documents, depending on the account type. Please note, that ONTRAS provides the billing data voluntarily. The data provided during the regulatory market processes are legally binding.

What are the deadlines for providing invoicing-relevant data?
ONTRAS always makes every effort to provide the invoicing-relevant data with the greatest care and as early as possible. The respective regulatory deadlines are mandatory for providing invoicing-relevant data.

Does ONTRAS provide gas quality data?
On request, ONTRAS provides benchmarks. This data provides an overview of the gas composition of selected types of gas at entry-points. This helps the users to get information about the gas quality in the respective region. Once a month ONTRAS will publish the gas quality information in the portal.

Is the billing data calibrated?
The gas-quality-reconstruction-system provides billable and calibrated gas properties for different points in the ONTRAS grid, which will be used for the energy quantity determination. The procedure is approved by the Physikalisch Technische Bundesanstalt (PTB) and supervised by the responsible calibration offices. A copy of the certificate can be provided on request.

What actions does ONTRAS take in case of a failure of the data measurement or data retrieval at a network connection point?
According to the requirements of the DVGW worksheet G685, an estimate will replace the data which is missing. As the creation of an estimate for customers with a volatile profile in gas consumption is a complex process, the creation of this estimate will be conducted upon best efforts and abilities and under the consideration of additional information.

How can the user and ONTRAS exchange information about modifications at the measuring device or the meter?
ONTRAS offers the possibility to exchange information about modifications via mail to Furthermore, the user is able to enter the meter readings directly in the ONTRAS portal. However, this data adjustment is only possible in case of control readings. Changes of the master data are not possible. The master data of the measuring device is also published in the ONTRAS portal.    

Changes of Capacity Marketing as of 01.01.2018

Changes of Capacity Marketing based on NC CAM 2.0 and new GasNZV as of 01.01.2018

With the Update of GasNZV and NC CAM there will be some changes in the allocation of capacities as of the 1. January 2018. Next to the allocation of within-day capacities at all network points, you are able to convert unbundled capacities into bundled capacities via auction. 

You can find all changes in the allocation of capacities in the following document

The answers given in this FAQ list have been written with reasonable diligence and to the best of one’s knowledge according to the current status. Nevertheless, ONTRAS Gastransport GmbH is not liable for the information given on this page to be correct, complete or up-to-date. The information on this page is legally non-binding information. Please be aware that using this information is at the customer’s own risk.