You should know more about single-phase electric meters and electromechanical meters, but now there is an electric meter called single phase electromechanical kwh meter , which combines the advantages of single-phase electric meters and electromechanical meters, so do you know the precautions for its installation and use?
The wiring of the watt-hour meter is complicated. Before wiring, the voltage terminal and current terminal of the watt-hour meter must be distinguished and then connected according to the technical manual. For the three-phase watt-hour meter, you must also pay attention to the phase sequence of the circuit. The accuracy of the watt-hour meter can only be guaranteed when it works under the conditions of rated voltage, rated current 20%-120%, and rated frequency 50Hz. The watt-hour meter should not work under the conditions of less than 5% of the specified current and greater than 150% of the rated current. Electricity meters that have not been used for more than half a year should be recalibrated. When the watt-hour meter is installed, it should be at least 0.5 meters away from the thermal system, 0.7~2.0 meters away from the ground and vertical installation is required, and the allowable deviation should not exceed 2.
Also, the three phase electromechanical kwh meter should pay attention to the above situations when installing and using it.