Auxiliary Supply Points (ASP) & Principal Supply Points (PSP)
Principal Supply Point (PSP) and Auxiliary Supply Point (ASP) cubicles are part of the key source assets for signalling power distribution throughout the rail infrastructure. RSP offers a wide range of quality railway Principal Supply Points products, which can be customised to fit your exact requirements.
Made to Measure Principal Supply Point PSP & Auxiliary Supply Point ASP Cubicles
Our Principal Supply Points PSPs and Auxiliary Supply Points ASPs can be designed and engineered to meet the customer’s requirements. We provide a design consultancy to enable clients to specify the most cost-effective and easy maintenance solutions. Our experienced team of in-house electrical designers offer a bespoke design package, which includes;
- 3D modelling of buildings, power and heating calculations
- AFC manufacturing wiring diagrams
In-house Manufacturing & Testing
All Network Rail PSPs and ASPs are manufactured in our facilities in Saltash, Cornwall, by our experienced in-house team. RSP’s Principal Supply Points are built and tested to BS EN61439 and BS7671 using Network Rail PADS-approved equipment. They also come with a fully documented client-focused Factory Acceptance Test.
Product Benefits
- Built to either your own design or allow us to produce a detailed design using
our unique RSP standardised approach to provide greater consistency,
improved lead times and cost savings. - Available in a range of RAL colours, including standard Green and Grey railway options.
- Built and tested to BS EN61439 and BS7671 using industry-leading materials and switchgear and with a fully documented client-focused Factory Acceptance Test.
- Available with reinforced flooring to enable both the generator and UPS
installation. - Full range of options available, including: additional internal walls, removable side walls, floor reinforcement, bespoke lighting arrangements, forced air ventilation or air conditioning as required, intruder and fire alarms.
Product Support
Our PSP’s come with a life expectancy of 35 years minimum and with the reassurance that an experienced technical team is on hand to support if required.
What is an Auxiliary Supply Point?
A Rail Auxiliary Supply Point (ASP) is a vital component of trackside electrical infrastructure, designed to provide dependable power for essential secondary railway systems such as points heating, signalling, and level crossings.
Unlike a Principal Supply Point (PSP)—which delivers primary traction or signalling power—an ASP ensures continuity of supply for non-traction equipment. This reliability is crucial for maintaining safe and efficient railway operations, even during network fluctuations or maintenance activities.