Electricity meter, also known as electric energy meter, fire meter, is used to measure electricity consumption and consumption speed instrument. Power meters are over 100 years old.From induction meter to electronic meter, after entering the 21st century, it has entered the era of intelligent power meter. In addition to the traditional function of power metering and billing of power customers and power companies, the smart power meter is also an effective tool for electricity information communication and power supply service interaction, and it is the basis of smart grid and intelligent power consumption. When choosing to use electricity meters outside, we should pay more attention to practicality and functionality.The following editor to introduce how the electricity meter should choose?How to solve the problem if?

I. What specific factors should be considered when choosing an electricity meter?

1. Environmental and climate characteristics, our country is vast, southeast and northwest climate conditions are very different. Therefore, when we choose the electricity meter, we should first consider its use place and environment, the highest temperature, lowest temperature, relative humidity, altitude and etc., beyond the scope of use, the electricity meter can not work normally, or the measurement accuracy will be greatly reduced.

2. Working voltage and working current, the general home electricity, the voltage is AC 220V, the frequency is 50Hz, the current should be determined according to the specific situation of use. If it is a centralized air conditioning, the power is 5kW, the current is about 22.5A, then, we choose the electricity meter minimum current is 25A.If it is a residential house, it can be estimated at 60-80W / square meter. The power of 100 square meters is about 6-8kW, and the current is about 27A-36A.

II. How to solve the failure of the electric energy meter?

1.The burnt paste flavor appears in the junction box:

Solution: the rubber junction box at the lower end of the dial, There are two main reasons:

When installing or replacing the circuit wire, the fixed screws in the box are not tightened. When the electrical load increases, the screws due to bad contact, burn the rubber box and associated with burnt smell. The solution is very simple. After removing the rubber wood wiring cover, pull down the main switch knife, remove all the power wires, scratch the wire head residue again with the knife, install it into the terminal column, and tighten all the screws to eliminate the fault.

The poor quality of the wire connected to the electricity meter from the room causes the oxide layer between the copper column and the wire (especially the electricity meter installed in the humid environment, and the unventilated place is easy to produce such problems), thus increasing the resistance value to heat the contact point and damage the junction box.

At this time, completely remove the oil in the junction box and replace the wire in time.Sometimes when the electrical equipment exceeds the actual current value of the meter, not only the junction box will be damaged, but also the meter may be destroyed by the strong current. Therefore, when the rated current of the meter is found to be very different from the load of the actual electrical appliances used, the meter should be misopened or replaced to prevent the meter from being destroyed or the electrical fire occurs.

2.Turn by itself during no-load:

Solution: When the meter rotates on empty load, all the electrical equipment and lighting fixtures in the house are not used, and the aluminum plate of the table is still rotating or slowly running. Generally speaking, when the power supply voltage is 80%~110% of the rated value, the rotation of the aluminum plate of the electricity meter will not be more than 1 circle belongs to the normal range (i. e., the wheel turns clockwise), but if the aluminum disc slightly rotates, it means that there is leakage in the electricity meter line, should be asked electrician to check and handle. If there is no leakage, it is the fault of the meter itself, should be sent to the power department for maintenance or replace the new meter.

3.A "squeak" sound occurs during operation:

Solution: when the electricity meter is running, there is a slight "buzzing" sound, which belongs to the normal phenomenon.However, if an irregular "squeak" occurs in the table, it is caused by the aging of some parts inside the table, loose parts of the electromagnetic field or the lack of oil of rotating gears. Damparts shall be sent to power department for inspection and replace.Sometimes, the meter is seriously overloaded, will also produce irregular noise, should be turned off in time to prevent damage to the meter.

The above is all the content of this article, if you want to know more about electric energy meters, please pay attention to this website!