Insulation resistance is measured by applying a direct current signal between the isolated line and earth: the level of insulation can be determined by measuring the leakage current to earth. HRI-R40 ensures an effective measurement of the insulation resistance even in the presence of strong interference and high harmonic or direct-current components, due to its sophisticated digital filter.
The device offers broad programming possibilities through its user-friendly digital display menu and four selection keys.
HRI-R40 tests the thermal and electric overloadof the insulating transformer, managing both PT100 or PTC probes. The electric overload monitoring of the medical transformer can also be tested by connecting a current transformer and setting appropriate alarm thresholds. The alarms can be controlled remotely by connecting up to four PR signalling panels.
Error-Link Fail system checkes that the terminals are connected correctly: it prevents the possibility to operate.
HRI-R40 measures permanently the resistance to earth in IT-M circuits and thermal and electrical overload of the insulating transformers for medical use, complying completely with the requirements of the international Standards: IEC 61557-8, IEC 60364-7-710 and UNE 20615
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