There are not a few families around us who use the mechanical kWh meter . Today's focus is on the basic understanding of mechanical kWh meters.
The basic currency is the current value that determines the relevant characteristics of the watt-hour meter, and the rated maximum current is the maximum current value that the meter can meet the accuracy specified by its manufacturing standard.
For example, 5(20)A means that the basic currency of the watt-hour meter is 5A, and the maximum rated current is 20A. For a three-phase watt-hour meter, the number of phases should be multiplied in front, such as 3x5(20)A.
The reference voltage refers to the voltage value that determines the relevant characteristics of the watt-hour meter. For a three-phase three-wire watt-hour meter, it is expressed by multiplying the number of phases by the line voltage, such as 3x380V. For a three-phase four-wire watt-hour meter, it is expressed by multiplying the number of phases by the phase voltage or line voltage, such as 3x220/380V. For single-phase watt-hour meters, it is expressed by the voltage on the terminal of the voltage circuit, such as 220V.
With the advancement of digital electronic technology, in recent years, old-fashioned mechanical watt-hour meters have gradually withdrawn from the stage of history, and watt-hour meters with more accurate measurement and easier management have gradually appeared, such as the single phase energy meter .
There are not a few families around us who use the mechanical kWh meter . Today's focus is on the basic understanding of mechanical kWh meters.
The basic currency is the current value that determines the relevant characteristics of the watt-hour meter, and the rated maximum current is the maximum current value that the meter can meet the accuracy specified by its manufacturing standard.
For example, 5(20)A means that the basic currency of the watt-hour meter is 5A, and the maximum rated current is 20A. For a three-phase watt-hour meter, the number of phases should be multiplied in front, such as 3x5(20)A.
The reference voltage refers to the voltage value that determines the relevant characteristics of the watt-hour meter. For a three-phase three-wire watt-hour meter, it is expressed by multiplying the number of phases by the line voltage, such as 3x380V. For a three-phase four-wire watt-hour meter, it is expressed by multiplying the number of phases by the phase voltage or line voltage, such as 3x220/380V. For single-phase watt-hour meters, it is expressed by the voltage on the terminal of the voltage circuit, such as 220V.
With the advancement of digital electronic technology, in recent years, old-fashioned mechanical watt-hour meters have gradually withdrawn from the stage of history, and watt-hour meters with more accurate measurement and easier management have gradually appeared, such as the single phase energy meter .