1. The 3 phase electricity meter can be installed and used after passing the inspection and being sealed before being shipped. If it is checked that the meter is lead-free or has expired storage, the relevant department should be re-verified before installation and use to ensure accurate measurement of electricity. 2. When the electric energy meter is taken out of the original packaging box, it is found that the inner packaging or the outer shell is damaged. Do not install or power on the electric energy meter. Please contact the technical service department of the product company. 3. The watt-hour meter should be installed indoors and choose a dry and ventilated place. The bottom plate of the watt-hour meter should be placed on a sturdy fire-resistant wall that is not susceptible to moisture and vibration. The table should not be tilted vertically. 4. When installing the watt-hour meter, install the specified phase sequence (positive sequence) and correct wiring diagram for wiring. The wires inserted into the junction box should be tightly fixed to avoid the bad connection of the connectors and burning the junction box. 5. To use the power meter in areas with more thunderstorms, lightning protection measures should be taken at the installation site. 6. In places where there is contamination and may damage the organization, the electric energy meter should be installed in a protective cabinet. 7. The load used by the three-phase watt-hour meter should be within 5% to 150% of the rated load, for example: 50A watt-hour meter can be used in the range of 2 to 75A. 8. An experienced electrician or professional is required to install the energy meter, and be sure to read the installation manual. Zhejiang Tepsung Electric Meter Co.,Ltd is a professional China manufacturer and supplier of 3 phase electricity meter . We specialize in the field of electronic and electromechanical energy meters. We have established a mature and professional team in instrument design, production and sales (pre-sales and after-sales), which has been widely praised at home and abroad. Welcome to order: https://www.yhddb.com/