Meter refers to the cumulative energy meter, commonly known as the fire table. There are two kinds of direct current meter and alternating current meter. AC power meter is divided into two kinds of three-phase power meter and single-phase power meter: three-phase power meter for power users; single-phase power meter for lighting users. Household electric meters are mostly single-phase electric meters. So how to choose a household electric meter ? What does the meter symbol mean?
[Specifications and Selection of Common Household Energy Meters]
Electric energy meter is generally divided into single-phase table and three-phase table. The family uses a single-phase meter. The rated working voltage is 220V, the rated frequency is 50Hz, and the rated operating current is different. There are 2.5A, 3A, 5A, 10A and other specifications, usually after the rated load current of the household electric energy meter. There is a parenthesis, the parenthetical number is marked with 2 times the rated current value, such as "2.5 (5) A" words, this shows that the 2.5A meter can withstand 5A of the operating current can still guarantee safe operation, but in this super In the case of load, it cannot be operated for a long time.
According to the above-mentioned rated voltage and rated current, the formula P=UI can be used to calculate how much power the meter can inherit. If the total power of the home appliance is 1100W, the 5A electric energy meter should be used first. Considering the overload capacity of the electric energy meter and the fact that the electric appliance is not used at the same time, a 5A electric energy meter can generally use a household electric appliance whose total power is about 2200W. However, if the home needs to install long-time high-power appliances, such as air conditioners, electric heaters, etc., it is necessary to apply to the power supply department to replace the electric energy meter with a large rated current [if the specification is "10(20)A" ], otherwise it will damage the meter or even cause a fire. In addition, special attention should be paid when using, do not use several high-power electrical appliances at the same time, so as not to burn the fuse and damage the meter.
[What does the meter symbol mean?]
There are many symbols on the electricity meter, including various physical symbols or some symbols on the information of the electricity meter. Each symbol has its special meaning. Here we have to popularize the meaning of these symbols for everyone.
1.GB/T17215-2002
GB two letters is the "national standard" letter abbreviation, representing the meter has passed national standards, 17215 is the production serial number of the meter, and 2002 represents the standard release date of this meter, 2002 represents the meter was released in 2002.
2. Zhejiang 00000252
Zhejiang represented this electricity meter in Zhejiang production, at the same time that the production license of this electricity meter was issued by the Zhejiang Provincial Bureau of Technical Supervision, and the following figure is the serial number of the manufacturing license.
Level 3.1 or 1
Level 1 represents the power meter's accuracy level 1 and describes the meter's accuracy.
4. Constant A constant is a special value that describes a numerical value of the relationship between the reactive energy recorded by the meter and the corresponding test output. If this value is a pulse number, then the constant describes the meter-related count in units of kilo-hours per hour (imp/kvarh) or the number of varh/imp per hour of the pulse.
5.220V
220V means that the meter should be used in a live environment with a voltage of 220V.
6.B
B represents the working environment of the electricity meter, such as temperature, humidity, smoke, insects and other environments, B represents the ability to adapt to these environments, to adapt to the ability to divide, the adaptability of the meter can be divided into P, S, A and B, where B is adapted The strongest ability.
7.50HZ
Represents the reference frequency of the energy meter. 50 Hz is the rated frequency of the meter.
8.MC
Metering recognition marks, the outer circle of the C letter is the "Chinese" English alphabet abbreviations, the inner circle of M letters is the "Measurement Apparatus" in the English alphabet abbreviations, the inner circle of the C letter is the "license" of the English alphabet abbreviations.
Xiao Bian concludes: The above introduces the meter symbol and hopes to help everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
[Specifications and Selection of Common Household Energy Meters]
Electric energy meter is generally divided into single-phase table and three-phase table. The family uses a single-phase meter. The rated working voltage is 220V, the rated frequency is 50Hz, and the rated operating current is different. There are 2.5A, 3A, 5A, 10A and other specifications, usually after the rated load current of the household electric energy meter. There is a parenthesis, the parenthetical number is marked with 2 times the rated current value, such as "2.5 (5) A" words, this shows that the 2.5A meter can withstand 5A of the operating current can still guarantee safe operation, but in this super In the case of load, it cannot be operated for a long time.
According to the above-mentioned rated voltage and rated current, the formula P=UI can be used to calculate how much power the meter can inherit. If the total power of the home appliance is 1100W, the 5A electric energy meter should be used first. Considering the overload capacity of the electric energy meter and the fact that the electric appliance is not used at the same time, a 5A electric energy meter can generally use a household electric appliance whose total power is about 2200W. However, if the home needs to install long-time high-power appliances, such as air conditioners, electric heaters, etc., it is necessary to apply to the power supply department to replace the electric energy meter with a large rated current [if the specification is "10(20)A" ], otherwise it will damage the meter or even cause a fire. In addition, special attention should be paid when using, do not use several high-power electrical appliances at the same time, so as not to burn the fuse and damage the meter.
[What does the meter symbol mean?]
There are many symbols on the electricity meter, including various physical symbols or some symbols on the information of the electricity meter. Each symbol has its special meaning. Here we have to popularize the meaning of these symbols for everyone.
1.GB/T17215-2002
GB two letters is the "national standard" letter abbreviation, representing the meter has passed national standards, 17215 is the production serial number of the meter, and 2002 represents the standard release date of this meter, 2002 represents the meter was released in 2002.
2. Zhejiang 00000252
Zhejiang represented this electricity meter in Zhejiang production, at the same time that the production license of this electricity meter was issued by the Zhejiang Provincial Bureau of Technical Supervision, and the following figure is the serial number of the manufacturing license.
Level 3.1 or 1
Level 1 represents the power meter's accuracy level 1 and describes the meter's accuracy.
4. Constant A constant is a special value that describes a numerical value of the relationship between the reactive energy recorded by the meter and the corresponding test output. If this value is a pulse number, then the constant describes the meter-related count in units of kilo-hours per hour (imp/kvarh) or the number of varh/imp per hour of the pulse.
5.220V
220V means that the meter should be used in a live environment with a voltage of 220V.
6.B
B represents the working environment of the electricity meter, such as temperature, humidity, smoke, insects and other environments, B represents the ability to adapt to these environments, to adapt to the ability to divide, the adaptability of the meter can be divided into P, S, A and B, where B is adapted The strongest ability.
7.50HZ
Represents the reference frequency of the energy meter. 50 Hz is the rated frequency of the meter.
8.MC
Metering recognition marks, the outer circle of the C letter is the "Chinese" English alphabet abbreviations, the inner circle of M letters is the "Measurement Apparatus" in the English alphabet abbreviations, the inner circle of the C letter is the "license" of the English alphabet abbreviations.
Xiao Bian concludes: The above introduces the meter symbol and hopes to help everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
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