Three-phase meter is a more complex meter, generally used in large factories and shopping malls and other facilities.  Since a large amount of electricity needs to be measured, the accuracy of an electricity meter is very important.  The following editor to introduce the use of three-phase electricity meters and installation standards?

I.How to use three-phase electricity meter?  

1. The electricity meter is inspected and sealed before delivery, and can be installed and used. If there is no lead seal or stored for too long, the relevant department should be asked to re-check and sealed before installation and use.   

2. The electric meter shall be installed vertically and not inclinedly in a dry and ventilated place. The base plate of the electric meter shall be fixed on a strong refractory wall, which is not easy to vibration, and the height of the electric meter shall be about 1.8m.   

3. Connect wires according to the circuit diagram, tighten the wiring screws, and tighten the connecting plate in the lower end twist box.   

4. The actual electric energy number of the transformer access meter must be multiplied by the ratio.   

5, one table one card: the IC card held by the user can not be exchanged, should be lost to the power supply department (that is, electricity sales) to buy a replacement.   

6. Preparation for power purchase: the user shall insert the IC card into the card holder once for the convenience of sending the data in the table back to the computer database.   

7. Power purchase mode: When selling electricity, insert the IC card into the IC card reader, operate the computer at the same time, and write the user number, pre-purchased power, capacity limiting mode and limited power into the IC card.  

8. Use of electricity card: Insert the electricity purchase card into the card holder. If the card is valid, the electricity meter will automatically read the data into the meter. Purchased electric quantity, total purchased electric quantity, times of electric meter, alarm electric quantity, credit limit, capacity limit power. Then remove the card and keep it properly.  

9. Operation display: During the operation of the electricity meter, the LCD screen shows the remaining electricity and the total electricity consumption in turn. 

II. What are the installation standards for three-phase electricity meters?   

1. the installation place can not have corrosive gas and liquid and can not have strong impact around, choose a relatively safe place,  

The operating temperature of the electricity meter should not exceed 50 degrees Celsius and avoid direct sunlight, which can prolong the service life of the electricity meter.   

2. the electricity meter installation should be installed in a special electricity meter box, the installation height must meet the specification, the electricity meter installed in the electricity meter box can not be less than 1 meter from the ground, The meter installed in the hanging meter box should not be less than 1.8m above the ground. Three-phase meters must be installed in accordance with this regulation.   

3. the circuit between the electricity meter and the current and voltage should be connected with a joint junction box, so that the staff can reduce the time to consume the fault query.  

4. The voltage and current transformers must be made of products with the same specifications, which must be produced by regular manufacturers. Inferior products are easy to cause short circuit.  

The connection point must be firmly fastened to prevent power outages, the transformer must be installed in a meter box, and anti-stealing measures must be taken.   

5. Electronic ammeter for remote sampling. The electronic ammeter for remote sampling must be equipped with a system to facilitate data collection, and the signal line must be shielded twisted-pair wire.  

When the signal line is installed, the single end of the shielded wire is grounded to improve the reliability of communication.  

6. If there is a metal meter box, the case of the meter box and the high voltage transformer must be grounded, because the metal meter box will conduct electricity, resulting in inaccurate measurement.  

The ground cable must be copper conductor with a diameter of at least 2.5 square millimeters.

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