Megger has introduced the DET14C and DET24C earth resistance clamp testers, which can be used with large conductors and in applications where access to conductors is restricted.
The new clamps feature elliptical apertures that can accommodate cables up to 39 mm in diameter and flat earth tapes up to 50 mm wide. In addition, these instruments have a CATIV 600 V safety rating, with 8 kV of transient isolation.
Designed to allow accurate measurement of earth resistance in multiple-loop systems without having to break earth connections, the new instruments can measure ground resistance over the range of 50 megohms to 1,500 ohms.
Both models offer auto ranging, high and low alarms, automatic self-calibration and internal memory that allows results to be recorded and reviewed. Results stored in memory are automatically date and time stamped.
The DET24C adds an optically isolated USB, and it can calculate the maximum, minimum and average values of periodic measurements. The DET24C is compatible with Megger's data capture and analysis software packages PowerDB and PowerDB Lite.
SOURCE: Megger
