The main types of smart meters are IC card meters, users hold IC cards to the power supply department to pay for power purchase, power supply departments use power vending management machine to write the purchase of electricity into the IC card, users hold IC cards in the induction area to swipe non-contact IC card (referred to as card, the same below), you can close the power supply, after power supply to take the card away. When the remaining power in the meter is equal to the alarm power, pull the power off alarm (or buzzer alarm), at this time the user can restore the power supply by swiping the card in the sensing area; When the remaining power is zero, the power is automatically turned off, and the user must pay for the purchase of electricity with the card again before the electricity can be restored. For residential electricity, when compared with mechanical meters and electronic meters, it has the following advantages:
1. It has a variety of anti-theft functions, small starting current, no latent operation, wide load, low power consumption, straight error curve, and good stability during long-term operation. Single-phase local fee-controlled smart meter
2. Beautiful appearance, small size, light weight and easy installation.
3. High accuracy: all-electronic design, built-in imported special chip, accuracy is not affected by frequency, temperature, voltage, and high-order harmonics.
4. Long life: using SMT technology, optimized circuit design, no need to adjust the circuit after the whole machine leaves the factory.
5. Low power consumption: adopt low-power design to reduce power grid line loss.
6. Pre-purchase of electricity; IC card transmits data to realize data readback, including: read back the total power, remaining electricity, cumulative power purchased in the meter, total power purchase times and other information.
7. Store table constants, initial values, user addresses, names and other information.
8. Overload alarm power off, remaining power alarm, remind users to purchase electricity in time.
The emergence of smart meters has also brought many benefits to energy meter testing institutions. For example, in the past, when testing a mechanical meter or electronic meter, after the meter is on the energy meter detection device, the commissioning personnel need to manually enter the address of each meter in the debugging software, as well as the active reactive power level of the meter, the commissioning parameter scheme applicable to the meter, which greatly increases the workload of the commissioning personnel, delays the delivery time of the electric energy meter on schedule, and has a non-negligible impact on the brand image of the enterprise, but since the birth of the smart meter, the commissioning personnel only need to put the meter on the machine. Then the network cable port of the debugging computer is connected with the network port on the electric energy meter verification device, and the communication serial port between the PC and the device is set, and their various parameters can be automatically generated on the verification software, and through the software short-term automatic verification process, whether the quality of the smart meter meets the national standard, it is clear at a glance on the computer display.
