HT2055 measures step and contact voltage up to 50 A. It consists of a power supply unit and a voltmeter module, necessary for measuring step and contact voltages in industrial electrical installations (TN systems, transformer cabinets) with a nominal test current up to 50 A. Two devices, synchronized in time and current, can provide accurate measurements of step and contact voltages consistent with the real current values measured by the power supply, also accounting for interference effects detected in the measured circuit. It can also measure grounding resistance and specific grounding resistance using the traditional volt-ampere method. These measurements can be stored in the internal memory of the voltmeter and uploaded to a PC using the provided Windows software.