Introduction: Celsius is an innovative, cost-effective approach to managing potentially excessive temperatures at distribution substations, which may constrain the connection of low carbon technologies. By delivering new solutions to manage these ‘thermal pinch points’, Celsius releases additional capacity from existing assets, reduces long-term costs for customers and avoids early asset replacement.

Objectives: A simple ‘Thermal Ratings Tool’ will accurately indicate an asset’s internal operating temperature using low cost external retrofit sensors. This knowledge will enable network operators to release the maximum capacity from existing assets without degrading their health and reliability. Celsius will show when and how to intervene to enhance that capacity by using a range of retrofit cooling techniques. The Project will prove that these techniques are acceptable to customers and can be rolled out across GB.