Digital electrical instruments are advanced tools that combine multiple functions including electrical parameter measurement, data display, data acquisition, and data transmission. They can measure various electrical parameters, such as single-phase or three-phase AC voltage, current, power factor, active power, reactive power, apparent power, and frequency, among others. These instruments also keep track of the cumulative number of days the load has been operational. These digital electrical instruments offer intuitive readings and utilize digital signal processing technology, boasting fast response times and high precision. They can be displayed using liquid crystal modules and are optionally equipped with RS485 interfaces and transmission outputs for computer communication, enabling automatic control and unattended operation. In various sectors, such as power, chemical engineering, manufacturing, construction, and transportation, digital electrical instruments are extensively applied. For instance, in the power system, these instruments are utilized for monitoring and managing power transmission, distribution, and utilization; in the field of architecture, they are employed to control and monitor various building equipment and systems, such as air conditioning and elevators.
