The IT-Monitor can be used to check the operating times and directional sensitivity of overcurrent relays with current-dependent and current-independent time delays. The programme automatically calculates the test quantities for the defined test current and selected fault type. The amplitude of the test current is defined in the current-time diagram. Test evaluation is performed with reference to the defined tripping characteristic which can be freely configured in the programmeIn addition, the programme already contains all standard characteristics according to IEC and ANSI. The
IT-Monitor also features a function for checking the directional control. In this case the relay is supplied with the relevant voltages as well as the currents.