We often hear others say single-phase meter and three-phase meter. So what is a single-phase meter, what is a three-phase meter, and what is a difference between them? What are the characteristics of the difference? Next, Jiangsu Senwei Electronics will take you to learn more about it.
1. The difference between single-phase meter and three-phase meter
Single-phase meter is generally used in residential buildings and has the most contact with our daily lives. The rated voltage is generally 220V; while three-phase meters are widely used, and factories, enterprises, large, medium and small merchants all use three-phase electricity, so if you want to use three-phase meter, it will have more specifications, including 220V like single-phase, and there are also specifications as small as 100V and as large as 380V.
Moreover, the accuracy of three-phase meter is generally at the 0.2S level, but the accuracy of a single-phase meter can only reach the accuracy of level 1, so three-phase meter is theoretically more accurate than a single-phase meter. Generally speaking, for single-phase and three-phase meters of the same style, three-phase meters are more expensive.
Single-phase charge control meter
Three-phase charge control meter
2. Precautions for installation and use of power meter
1. Grounding
The meter must be grounded and installed. Whether it is during installation or before power is turned on, it must be sure to be reliable grounded.
2. Test
If it is a mechanical meter, be sure to turn on the power supply after installation and turn on the electrical appliances to observe whether the rotary dial is turning from left to right. If so, it means that the installation is correct. Then close the electrical appliances and observe again. Whether the rotary dial is turning. If it rotates, it means there is a problem and needs to be repaired and installed again.
Smart meter is also the same thing. They all need to be tested and can only be put into use after the test is correct. However, smart meter needs to be tested for many functions, and these require the installation master to complete them carefully and patiently.
3. Pay attention to abnormalities
Pay attention to abnormal phenomena during use of the meter. Sometimes you may hear a slight current or a slight induction current on the meter. These are normal phenomena, and sometimes abnormal noises in the meter case may occur. At this time, you need to disassemble and check whether there is a problem with the internal parts. If so, you need to repair it in time. You can ask a professional meter manufacturer or grid installation master to help with the inspection.
Now do you have a general understanding of the difference between three-phase meter and single-phase meter? You can follow Jiangsu Senwei Electronics Co., Ltd. to learn about relevant knowledge about smart meters and obtain the latest smart meter information.
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