PSP’s, ASP’s & DNO’s

Domestic Network Operator (DNO) cubicles, Principal Supply Points (PSPs) and Auxiliary Supply Points (ASPs) are the key source assets for power distribution throughout the rail infrastructure. RSP are able to offer a full range of products from off the shelf modular solutions or miniature variations with associated savings right through to large scale bespoke buildings incorporating generators, ups's and all associated switchgear panels.

PSP’s, ASP’s & DNO’s



RSP’s has experience of providing a full range of solutions for DNOs, PSPs and ASPs. Our DNO cubicles can be supplied in any size or shape required and are available in steel or GRP. PSPs and ASPs can be configured to user requirements and we have experience of supplying standard NR sized buildings through to large and small bespoke units including features such as; re-enforced flooring and removable walls. We have experience of conventional, modular and miniature solutions and are happy to provide design consultancy to enable clients to specify the most cost effective and maintainer friendly solutions.


RSP employ a dedicated team of in house electrical designers who can offer a bespoke package of design. From 3D modelling of buildings, power and heating calculations through to AFC manufacturing wiring diagrams, RSP can undertake the product design for a wide range of projects utilising our wealth of knowledge gained through many years of industry experience.


Our manufacturing and test staff have a wealth of experience in this field and hold IRSE licences and industry qualifications and certification appropriate to their role.

This gives our clients peace of mind that we will deliver a high standard of workmanship and quality which is verified by our in house testing team who carry out full 3c testing of each installation.


RSP have been working with various customers to provide combination buildings that utilise the building to house both PSP and signalling equipment saving both time and space compared to the conventional method of having two separate enclosures. RSP have also developed the “miniature” mPSP which can provide further time and space savings. Our 3D Cad facility enables us to determine the most cost effective and use friendly layouts to meet all our customer requirements.


With a minimum life expectancy of 35 years, each of our products come with the reassurance that an experienced technical team is on hand to support if required


The technical specification for this product will be added soon. For immediate information, feel free to fill out our enquiry form or give us a call.


For more information about these components, please send an email to or use the form below.

Product contact

RSP Rail love a challenge. If you have a complex project, work package or need Network Rail approved products, give us a call on 01752 969321 or email