How many amperes does the household electricity meter have? How to install it?

I believe many people know that electricity meters will be installed in our homes. The main function of electric meter is to monitor the electricity consumption in the home, and it is a device to monitor the current. What is the amperage of the electric meter? Electric meters can be divided into many kinds. Generally, the mA of household electric meters is relatively low, and household electric meters can be divided into many brands. MA of different brands and types of household meters is also different. Now, let's see how many amperes there are in the household electricity meter and how it is installed.

1. How many amperes does a general household electric meter have?

Selection of meter capacity: the meter capacity should be 20~ 120% of the rated current of the meter, the single-phase 220V lighting device should be 5 A per kilowatt, and the three-phase 380V power consumption should be 5a or 2 A per kilovolt/kloc-0.

Meter current: The rated current of general household meters should not be greater than 10A. This is because:

1.？ When the power factor is 1, the starting current of the electric meter is about 0.5~ 1% of the rated current, so an electric meter with 10A will start to rotate only when the current is 0.05~0. 1A, and its power is equivalent to12 on a 220V line. Although ammeter is a precise instrument, it still has inevitable mechanical resistance when it rotates. At the beginning of rotation, the accuracy of the meter is not high, because the difference between dynamic torque and mechanical resistance is very small.

2.？ Only when the current of the calibrated ammeter is within the range of 10~ 100% of the rated current and the power factor is 0.5~ 1, can the error not exceed 1~2%. That is to say, a 10A meter can only achieve the purpose of accurate measurement when the load is1/kloc-0 ~ 2200 watts. At present, the average household wattage does not exceed this range. If the nameplate current of the electric meter exceeds 10A, the purpose of the measurement standard will not be achieved and it is not suitable for use.

Second, the installation of electric meter:

1.？ The electric meter shall be installed on the wall or switchboard which is not easily affected by vibration, and the distance from the ground shall be between1.7 ~ 2m;

2.？ The place where the electric meter is installed should be clean, dry and free of strong magnetic field, and set in an obvious place as far as possible for reading and monitoring;

3.？ The electric meter should be installed in a box susceptible to mechanical damage, dust and touch.

4.？ The electric meter shall be installed vertically, and the allowable deviation shall not exceed 2;

Power-on check: Power-on check whether the electric meter works normally. If there are abnormal phenomena such as non-rotation, inversion and excessive error, the reasons should be analyzed and the faults should be eliminated. Most of these failures are caused by wiring errors. The reason for the inversion may be that the polarities of voltage and current coils are reversed, and the polarities of current and voltage transformers are reversed, or the load may be abnormal. For example, in the load of three-phase active power meter, when a large-capacity motor runs at an overspeed, the motor becomes a generator, and then the active power meter will reverse. ? Calculate and check the operation of the electric meter: after the electric meter is put into use for a period of time, it should be calculated and checked. Sometimes, although the wiring is wrong, it is difficult to observe it only from the running state of the watt-hour meter. It is necessary to calculate according to the power, power factor and working time of the load, and compare the calculation result with the reading of the watt-hour meter to confirm the reliable operation of the watt-hour meter.

Now, do you know how many amperes there are in the household electric meter 1? Household ammeter should also be selected according to the current of ammeter, and it is better not to exceed 10A, because the power factor of ammeter is about one, so the rated current used is probably within 1%. If the ammeter exceeds 10A, it may cause a short circuit. When we choose and install electric meters, we need to turn off the main switch at home. Before installing the electric meter, you should test whether it can work normally. You can measure it with some measuring tools and install it after it is normal.

Tubatu Online provides you with "every decoration quotation, 1-4 local decoration companies, 3 sets of decoration design schemes" and the decoration pit avoidance strategy for free! Click this link:/Zhu Ye /zxbj-cszy.php? to8to _ from = SEO _ zhidao _ m _ jiare & amp； Wb, you can get it for free ~