Electrical and electronic measuring, signaling and monitoring devices, with or without switching function, namely, insulation monitoring devices, residual current monitors, ground fault circuit interrupters, measuring, protective and monitoring relays for monitoring and signalling electrical quantities, in particular of insulation resistances, currents, voltages and other electrical and non-electrical quantities; electric and electronic measuring instruments, test devices and multi-function instruments for measuring and testing electrical and non-electrical quantities of electrical equipment, medical electrical equipment and electrical installations; electrical and electronic devices, modules and systems for power supplies in hospitals and medical facilities; components for monitoring, control and operation of power supply systems and power distribution boards; switchover and monitoring systems in switchgear and controlgear, electrical systems and other electrical equipment; operator, indicator and monitoring panels; computer hardware and computer software for use in evaluation, visualization and archiving of operating data parameters and measuring values of electrical power supply systems