“AIST A300” meter is used for measuring and metering of active and reactive energy in three-phase AC circuits and transmission of telemetric information about the consumed electricity when used in automated data acquisition systems.
Main functions
Electric energy meter three-phase electronic “AIST A300” performs the following functions:
- Measurement of current and voltage in each phase.
- Calculation of active and reactive energy.
- Registration of consumed energy.
- Countdown of time and calendar date.
- Exchange of information with the concentrator by means of data transfer units.
- Data storage in the energy memory
Consumer and service data are displayed on the liquid crystal display (LCD) located on the front panel of the meter. The meter can be operated autonomously or in an automated system for collecting data on electricity consumption. It is possible to configure the meter parameters using a computer. The meter allows to control electricity consumption taking into account the developed tariff structure.
Digital data transmission interfaces
The meters have RS-485 interface and IR port. The IR port is designed for local communication with the meter via a computer with an adapter for IR communication (USB/IRDA converter). This converter provides an infrared communication channel with the meter. The communication speed of transmission via IR port is 1200 bps. RS-485 allows information transfer between the meter and a hub or a computer with an RS-485 adapter. The RS-485 communication speed can be set within the range of 1200~9600 bps. To perform data exchange it is necessary to use specialized software “AIST Meter Configurator”, as well as appropriate adapters for interface connection. For reading by RS-485 interface it is necessary to connect the meter serial interface circuits via RS-485/USB interface converter to the USB port of a personal computer.
Control relay
The meter has a built-in power relay that can be controlled remotely by a command in the meter protocol format. The command to disable/enable the relay is given via the RS-485 interface or via an additional data input/transmission unit installed in the meter. During the switch-on procedure, after the corresponding command has been given to the meter, it is also required to press the control button on the meter panel and hold it for two seconds – this is an additional protection measure against erroneous switch-on of the meter. Thanks to the power relay built into the meter, remote control of consumers is possible.
The replaceable communication module is designed for single‑phase electricity meters.
The modular controller is used for remote reading collection. It is installed in the standard mounting slot within the meter’s housing.
The key advantage is the controller’s operation in the Data Acquisition Unit mode: the module interrogates the metering device and generates a telemetry data packet using open industrial protocols — SNMP, MQTT, and MODBUS. This enables seamless integration with any SCADA systems and IoT platforms.
The controller transmits data from the meter to the server via the 5G cellular network. The module requires a SIM card to operate. Subscription fees for communication services are charged by mobile network operators.
