4 Types Three Phase Energy Meter

 Energy meters, which measure the consumption of electrical energy, are installed and utilized in every household.Everyone also possesses a basic understanding of how they work.There are many types of energy meters that can be divided into single phase energy meters and three phase energy meters based on the power supply type.Three phase energy meters are primarily used for industrial and large users' electricity meters.Today, we will focus on analyzing the different types of three phase energy meters.

 

Three phase energy meters can be divided into three categories: Three phase three wire energy meters, high voltage three phase four wire energy meters, and low voltage three phase four wire energy meters. Low voltage three phase four wire energy meters can be further divided into two categories: Three phase four wire indirect phase energy meters and three phase four wire direct energy meters.Different types of three phase energy meters are used depending on the application.

1.Three phase three wire energy meters

Three phase three wire meters have common voltage specifications of 3x100V.The voltage between phases a, b, and c is 100V each, and the current specification is 1.5 (6)A, 0.3 (1.2) A, etc.The accuracy class is 0.5, 0.2.There are two class of this device, and it is used to measure the power consumption of triangles.Three phase three wire energy meters do not have a neutral line.When installed, they are connected to two current transformers, and voltage sampling is typically applied through a pt (potential transformer) for connection.They are commonly used in high voltage cabinets, industrial parks, power stations, substations, and checkpoint meters, among other places.

2. High voltage three phase four wire energy meters

The voltage specifications for high voltage three phase four wire energy meters are 3x57.7/100V,which means that the phase voltage is 57.7V and the line voltage is 100V.The current specifications are as follows: 1.5 (6) A, 0.3 (1.2) A, etc., with an accuracy class is 0.5 and 0.2.It is used for measuring the power of a star connection. When installed, it connects to three current transformers, and voltage sampling is typically applied at the pt connection.This method is widely utilized in high voltage cabinets, industrial parks, power stations, substations, and checkpoint meters, among other applications.

3. Low voltage three phase four wire indirect energy meters

The voltage specifications for low voltage three phase four wire indirectly energy meters are 3x220/380V, which indicates that the phase voltage is 220V and the line voltage is 380V.The current specifications are mostly 1.5 (6) A, with an accuracy class is 0.5, and it is used for measuring the power of a star connection.When installed, it connects to three current transformers and the voltage sampling is directly linked to a three phase electricity meter.It is suitable for commercial buildings, large office buildings, factories, schools, and other large power users' locations. A low voltage three phase four wire mutual inductance energy meter will be used in circuits where the current on the low voltage  side exceeds 100A.

4.Low voltage three phase four wire direct energy meters

The voltage specifications for low voltage three phase four wire direct energy meters are 3x220/380V, which indicates that the phase voltage is 220V and the line voltage is 380V.The current specifications are 5(60)/ 5(80)/ 5(100)A, with an accuracy class is 0.5 and 1, which are used for measuring star phaseconnected power.When installed, the power line is directly connected to the input terminal of the three phase energy meter, and the output terminal leads to the user.It is suitable for use in shops, villas, workshops, and circuits where the current on the low voltage side is less than 100A.In these cases, a low voltage three phase four wire direct phaseacting energy meter will be utilized.

 

Three phase energy meters have numerous applications beyond measuring electrical current.These include timing of usage, measuring forward and reverse power, calculating reactive energy, detecting events/alarms, recording event data, load profile, and remote communication.They help users and power management personnel to understand the operation of electricity in real time, monitor and measure the energy consumption of various equipment, take corresponding energy phasesaving measures, and reduce energy costs.

Different specifications of three phase energy meters are not strictly limited to certain applications.They are primarily determined by the actual power demand and energy management requirements.