A N   E M P L O Y E E   O W N E D   C O M P A N Y

Standby Power Solutions

PB Design has long been serving the rail and metro infrastructure within the UK with robust DC switch trippers for over 3 decades. Our PADS approved designs meet the needs of Network Rail. We also have extensive knowledge of London Underground installation, supporting the Jubilee line over 20 years ago for example.

Our thyristor based technology is a proven design with a product life often in excess of 20 years. We offer a range of application uses:

  • Battery tripping unit – power assurance for safe operation, always there when required
  • Telecoms – communication assurance for constant communication to the substation assets
  • SCADA – status and control assurance for safe operation

Batteries do not last forever and we have experience in replacing batteries onsite, project managing the work to ensure minimal downtime and disruption.

Innovative and well-engineered products

Personal & responsive customer service

Continued maintanence and support

Applications for Rail & Transport


The DC battery tripping unit is a vital component in rail applications, ensuring the safety and efficiency of the electrical system. Our DC tripping units are PADS approved.

Metro and underground

The DC system is the backbone of a high-voltage industrial/utility substation. Our industrial chargers maintain the health of the DC system by providing a steady charge to batteries, which serve as backup power sources. Given the critical nature of the system, redundancy can be provided with a dual charger configuration.

Road infrastructure
Road Infrastructure

Ensuring the safety of drivers, our DC switch tripper units and intertrippers provide the essential DC power allowing the substation to continue to operate even during power outages.


DC systems are the backbone of a substation, ensuring that essential electrical systems within the substation continue to operate even during power outages. PB Design have been providing UK airports with essential DC power.

Products for Rail & Transport

PB Design offers a range of DC Switch Trippers and Inter-trippers from 2A up to 300A. If our standard products don’t meet your requirements, talk to us about a bespoke design.


Read more

flxCHARGE Size 2 to 10

Read more


Read more

flx+CHARGE Range

Read more


PB Design offer a range of pre and post sale services including design, installation, commissioning, maintenance and battery replacements.

Our Clients

From national requirements to individual needs, we have successfully completed many projects in a wide range of applications and environments.
Network Rail logo
London Underground logo
Brush logo
ABB logo
Siemens logo
Schneider Electric logo

Latest News & Resources

PB Design Announces New Managing Director and Senior Leadership Team

As we embark on a new chapter in our company’s journey, we are excited to announce several strategic changes to our senior leadership team that will enhance our capabilities and expertise. The PB Design Board has appointed Scott Edsall, our current Strategy & Technical Director, as our new Managing Director effective April 1st. Scott has […]

Read more
We are now accepting credit cards

PB Design are pleased to announce that we now accept Visa and Mastercard for payment.

Read more
Presenting £10,661 to Children’s Hospice South West.

Our riders, Scott Edsall, Mark Crocker and Simon Cootes (L-R) presenting Sarah Heppenstall from Children's Hospice with a cheque for £10,661.

Read more