①Powerful and easy to expand
An electronic energy meter is equivalent to several inductive energy meters. For example, a full-featured electronic multi-function meter is equivalent to two positive active meters, two positive reactive meters, two maximum demand meters and one It only has a pressure-loss chronograph, and can realize the functions of time-sharing measurement and automatic data reading that these seven meters cannot. At the same time, the reduction in the number of meters effectively reduces the pressure drop of the secondary circuit and improves the reliability and accuracy of the entire metering device.
②High accuracy level and stable
The accuracy level of inductive energy meters is generally 0.5 to 3.0, and the error is easy to change due to mechanical wear, and the electronic energy meter can easily use various compensations to easily reach a higher accuracy level, and the error is stable Good performance, the accuracy level of electronic energy meters is generally 0.2 ~ 1.0 level.
③The starting current is small and the error curve is smooth
Inductive energy meters can only be started and measured at 0.3% Ib, and the error curve changes greatly, especially at low loads. The electronic energy meters are very sensitive and can start and start at 0.1% 1b Measurement, and the error curve is good, the error is almost a straight line within the full load range.
④Wide frequency response range
The frequency response range of inductive energy meters is generally 45 to 55 Hz, while the frequency response range of electronic multi-function meters is 40 to 1000 Hz.
⑤ Little influence by external magnetic field
Inductive energy meters are measured based on the principle of moving into a magnetic field, so the external magnetic field has a great influence on the meter's measurement performance. The electronic energy meter mainly relies on the multiplier for calculation, and its measurement performance is less affected by the external magnetic field.
⑥Easy to install and use
The installation of inductive energy meters has strict requirements. If the horizontal deviation of the suspension is large or even significantly inclined, it will cause inaccurate energy measurement. The electronic energy meter uses an electronic measurement method without mechanical rotating parts, so there is no such problem. In addition, its small size and light weight make it easy to use.
⑦ Large overload capacity
Inductive electric energy meters work with coils. In order to ensure their measurement accuracy, they can only be overloaded 4 times; while electronic multi-function meters can reach 6 to 10 times overload.
⑧ Stronger anti-theft power
Electricity theft is an unavoidable practical problem in China's urban and rural electricity consumption, and the inductive energy meter has a poor ability to prevent electricity theft. The new type of electronic energy meter is based on the basic principle to prevent common electricity theft. For example, the ADE7755 can measure the phase and neutral currents through two current transformers respectively, and use the large current as the basis for energy measurement, so as to prevent theft of short-circuit current wires.
Zhejiang Tepsung Electric Meter Co.,Ltd. . is a manufacturer and supplier of single-phase, three-phase electric meters, electronic energy meter and digital energy meters. We have established a mature and professional team in the design, production and sales of electric meters. https://www.yhddb.com/product/electronic-kwh-meter/