Leakage current tester
LCM-500 Doble Lemke

The Leakage Current Monitor (LCM-500) system measures the resistive component of continuous leakage current in gapless metal oxide surge arresters (MOSAs). The LCM is connected to the arrester and consists of three main parts:

* A current probe attached to the connector of either a clip-on current transformer or a toroid transformer (in permanent installations).
* A field probe connected to the current probe via a coaxial cable and an adapter positioned near the base of the arrester, to pick up the capacitive current component.
* A leakage current instrument that uses harmonic analysis of current and field probe signals to determine the resistive component of the leakage current.

Features and Benefits

* Portability. Lightweight, battery-operated instrument is easily transportable for inspecting surge arresters on a regular basis.
* Arrester ID. Provides unique identification of each surge arrester, making data management easy. The LCM can store 1000 surge arrester IDs and measurements performed in the field.
* Data Management. Define individual surge arrester types, including operational parameters. Software functions include evaluating groups of surge arresters by arrester type or by region.
* Cost-Effective. Inspecting a surge arrester takes less than 10 minutes on location and can be performed with the arrester in live operation, without disturbing power distribution.