Metrohm LLI-750DC - Live Line Indicator Kit (750V DC)

The High Voltage DC Live Line Indicator (LLI) is a battery operated electronic unit that has been specifically designed to test DC systems - with particular relevance to Mass Transit Railway (Metro) & Tram based models. Although usually applied to overhead catenaries they can also be used on “third rail” installations. Proving that the system is de-energised – and can thus be safely earthed – is important to both maintenance staff and system security.