Many devices are complementary, as are multi-user energy meters . Multi-user energy meters are generally used with current transformers. So do we know how multi-user energy meters choose current transformers? Let ’s take a look together!
二是为了将多用户电能表标准化，运用多用户电能表的输入电流只要1A或5A两个规格，具体是选1A还是5A，就看您挑选的电流互感器变比，比方选150/5的，就选5A的电度表，选150/1电流互感器,就选1A。 How to choose a multi-user electric energy meter 150/5 is the current transformer ratio. The current transformer is based on the share to change the large ammeter to a small current. For example, 150/5 is to reduce the large current by a 1/30 share. There are two purposes: one is to reduce the cost of multi-user energy meters for metering equipment; the other is to standardize multi-user energy meters. The input current of multi-user energy meters requires only two specifications of 1A or 5A, specifically whether to choose 1A or 5A. 5A, depending on the ratio of the current transformer you choose. For example, if you choose 150/5, choose a 5A watt-hour meter. If you choose a 150/1 current transformer, choose 1A.
Smart multi-user energy meters are used as the home interface of the power grid. On the one hand, the power grid transmits the **, high-quality power to the user's electrical equipment through smart meters; and with the widespread application of new power, many distributed new power, such as Wind energy, solar energy, etc. have been fully used at the user end. This kind of micro-distributed power can also be reflected into the power grid through smart meters, and complete grid connection with the power grid.
Therefore, smart meters need to have two-way power transmission and metering functions. The selection of transformers and multi-user energy meters should be summarized and considered based on quantitative accuracy requirements, the size to be quantified, and the operating environment. When multi-user energy meter readings, the demand is multiplied by the previous transformation ratio, which is the final number of electricity consumption. Multi-user energy meters connected to current transformers need only 1A and 5A.
The current of the selected transformer is 1.2 times the rated current, which can only be large or small, and is generally rounded between 1.2 and 1.5 times; the smart multi-user energy meter is used as the home interface of the power grid. High-quality electrical energy is delivered to the user's electrical equipment; With the widespread application of new power, many distributed new powers, such as wind energy and solar energy, have been fully used on the user side, so smart meters require two-way power Transmission and metering functions.