Abstract
Electrical installations represent an important part of the industry. In this sense, knowing the state of the electrical installation in real time through the readings of the installed power analyzers is of vital importance. For this purpose, the RS485 bus can be used, which most electrical installations already have. An alternative to the bus wiring and its distance limitation is the use of low-power wide area networks (LPWAN). The long range (LoRa) protocol is ideal for industries due to its low-power consumption and coverage of up to 10 km. In this research, a device is developed to control all the reading and programming functions of a power analyzer and to integrate the device into the LoRa LPWAN network. The power analyzer monitor and programming device (PAMPD) is inexpensive and small enough to be installed in electrical panels, together with the power analyzer, without additional wiring. The information collected is available in the cloud in real time, allowing a multitude of analysis be run and optimization in real time. The results support high efficiency in information transmission with average information loss rate of 3% and a low average transmission time of 30 ms.
Highlights
Electronics 2021, 10, 453. https://Nowadays, knowing the state of residential and industrial electrical installations in real time is of vital importance
Each of the tests lasted 30 min, and alternators, motors, and loads were used under a variety of test conditions, which are discussed
This research develops a low-cost device for the integration of power analyzers into wireless networks under the long range (LoRa) protocol and RS485 interface
Summary
Electronics 2021, 10, 453. https://Nowadays, knowing the state of residential and industrial electrical installations in real time is of vital importance. The internet of things (IoT), together with the storage and analysis of data in the cloud, constitutes a fundamental tool for the monitoring of electrical installations. Many electrical installations in industries are monitored locally with power analyzers that have RS485 bus connection capabilities but are not connected, and measurements are not available remotely. Companies integrating with Industry 4.0 acquire a multitude of data from sensors, and measure a large number of variables, including electrical variables. Integrating power analyzers in expanded, modified, or new installations within industries requires wiring for the RS485 bus where measurements are concentrated. Even in this scenario, the measurements would be stored locally unless they were uploaded to the cloud from the control center
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