Accessory for loop impedance measurement with high resolution and prospective short-circuit current up to 400ka
HT Instruments IMP57 Loop Impedance Measurement Accessory for loop impedance measurement with high resolution and prospective short-circuit current up to 400ka
- IMP57 is an optional accessory to measure Loop/Line fault loop impedance and calculating the prospective shortcircuit current.
- IMP57 can be used together with the devices of series GSC, SIRIUS, Combi and Macrotest Gx further to ZG47, Fulltest3 and Speed418.
- The high generated test current (approx. 200A) allows carrying out measurements with high resolution (0.1mΩ) and, therefore, obtaining correct and precise results, even near MT/BT transformer cabinets (TN systems) and, in general, carrying out measurements in which the devices’ basic resolution is not sufficient to guarantee correct measurements of prospective short-circuit currents according to the project’s theoretical data.
- L’IMP57 is provided with a comfortable and resistant case structure, it has no display and can be interfaced through serial RS232 to Master devices in order to read the results. 4-terminal measurement allows not considering the effect of the provided cables’ resistance and, hence, no preliminary calibrations are necessary.