Identifying deterioration of installation and other causes of "nuisance tripping" in live circuits is not always a straightforward matter. Problem of access and isolation may make the inspection costly. Then, lets look at CEM Leakage Clamp Meter designed to take the stress out of inspecting live installations.

Now, thanks to unique AC Leakage Clamp Meters developed by CEM, we can make not only a precise measurement of the earth leakage current in a circuit, but also an instant assessment of the cause of that leakage without shutting down the installation.

At the first glance, the CEM Leakage Clamp meters appear to be conventional clamp ammeters. However, the special construction of the clamp shielding, allows us to measure tiny out- of-balance currents between any conductors enclosed within the transformer jaws.