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Efficient and Effective

Link Alert

Developed and trialled remote monitoring equipment of low voltage link boxes.

Project-on-a-Page summary

Project data

Start date: 05/02/2018
End date: 04/05/2020
Budget: £0.25m

Link box failures are difficult to predict as there is no active monitoring on this type of equipment. Risk is currently mitigated with a high frequency inspection policy. Through Link Alert we’ve developed a link box monitor to deploy on high risk link boxes.

The project tested prototype devices to remotely monitor link box temperatures. Once a design was selected and finalised, 50 installations were carried out. The devices monitored temperatures at predetermined time periods, which sent an alert signal if a temperature measured above a certain limit.

In-situ monitoring of link boxes has not previously been conducted for a number of reasons, primarily because effective remote communications from link boxes has not been possible. This has been compounded by the harsh environments link boxes are installed in with a lack of auxiliary supply and extremely poor radio reception.

Communication with link boxes was demonstrated in previous projects (SULVN and FUN-LV). In these trials, there were a number of data communication issues. These included missing measurement data and incorrect current direction. In the Link Alert project, it was decided to trial a non-invasive temperature sensor that was installed above the bell cover. Normal mobile signal (4G and 3G) was sufficient for this application. More learnings are noted in our closedown report.


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